Listed in the following table are practice exam questions and solutions, and the exam questions and solutions. Additional materials for exam preparation can be found under the class sessions dedicated to exam review. Students were encouraged to prepare a 4x6 inch notecard to use for reference during each exam.
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Exams files. Need help getting started? Don't show me this again Welcome! Exam 1 PDF. Solutions to Exam 1 PDF. Exam 2 PDF. Solutions to Exam 2 PDF. Final Exam PDF.Tom was throwing a six-sided die. The first time he threw, he got a three; the second time he threw, he got a three again.
However, the concert staff told them the tickets were limited.
Twenty people wanted to attend the concert but only 10 free tickets were left. So the concert center staff decided to use a lottery to decide who would receive the free tickets. What the probability of Laura and Melissa both getting a 6? There were 50 of them: 20 red, 10 green, 12 yellow and 8 blue. After shaking the box, he randomly selected 2 candy balls from the box.
Throwing a die one hundred times. The probability of getting a heart while playing card games. Grades earned by students on a statistics final exam. Sarah is thinking about having the test. Before she has the test she wonders the probability that she has TB. The probability of Sarah having TB is ….
More information needed to calculate. It depends on the values of the mean and standard deviation. One standard deviation of the mean.
STATS 200 Quiz 2 Complete Answers
Two standard deviations of the mean. Three standard deviations of the mean. It depends on the value of the mode. What is the corresponding Z score for a case having a value of 10? Approximately, what proportion of the area lies between values of 17 and We cannot tell from the given information.
Their professor creatively decided to give each of them their Z-score instead of their grade. Rachel got her Z-score of She was wondering how well she did on the exam. It was very good, much better than almost all. Search this site. Report abuse. Google Sites.True or False.
STAT Final Exam Cheat Sheet
Justify for full credit. Identify which of these types of sampling is used: cluster, convenience, simple random, systematic, or stratified. He teaches two sections, and plans on randomly selecting 10 students from the first section and 15 students from the second section. She surveyed all of her classmates to collect sample data. Show all work.
Just the answer, without supporting work, will receive no credit. Express the relative frequency to two decimal places.
A box contains 3 marbles, 1 red, 1 green, and 1 blue. Consider an experiment that consists of taking 1 marble from the box, then replacing it in the box and drawing a second marble from the box. Express the answer in simplest fraction form. The five-number summary below shows the grade distribution of two STAT quizzes for a sample of students.
For each question, give your answer as one of the following: i Quiz 1; ii Quiz 2; iii Both quizzes have the same value requested; iv It is impossible to tell using only the given information. Then explain your answer in each case. There are students in a high school.
Among the students, students have a laptop, and students have a tablet. Let L be the event that a randomly selected student has a laptop, and T be the event that a randomly selected student has a tablet. Consider rolling two fair dice. Let A be the event that the two dice land on different numbers, and B be the event that the first one lands on 6. How many different ways can the two books be selected? Assume random variable x follows a probability distribution shown in the table below.
Determine the mean and standard deviation of x. Mimi just started her tennis class three weeks ago. Assume her opponent serves 10 times. As we know, the distribution of X is a binomial probability distribution. What is the number of trials nprobability of successes p and probability of failures qrespectively?
Assume the weights of men are normally distributed with a mean of lb and a standard deviation of 30 lb. Assume the IQ scores of adults are normally distributed with a mean of and a standard deviation of In a study designed to test the effectiveness of acupuncture for treating migraine, patients were randomly selected and treated with acupuncture.
After one-month treatment, the number of migraine attacks for the group had a mean of 2 and standard deviation of 1. She conducted a survey on a random sample of adults.
The survey showed that 80 adults in the sample believe in global warming. Assume Mimi wants to use a 0. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
Show all work; writing the correct P-value, without supporting work, will receive no credit. In a study of memory recall, 5 people were given 10 minutes to memorize a list of 20 words.
Each was asked to list as many of the words as he or she could remember both 1 hour and 24 hours later.We will update answers for you in the shortest time. Thank you! We truly value your contribution to the website. Refer to the exhibit. Assuming that the routing tables are up to date and no ARP messages are needed, after a packet leaves H1, how many times is the L2 header rewritten in the path to H2?
Explain: H1 creates the first Layer 2 header. The R1 router has to examine the destination IP address to determine how the packet is to be routed. If the packet is to be routed out another interface, as is the case with R1, the router strips the current Layer 2 header and attaches a new Layer 2 header. When R2 determines that the packet is to be sent out the LAN interface, R2 removes the Layer 2 header received from the serial link and attaches a new Ethernet header before transmitting the packet.
Which type of static route is configured with a greater administrative distance to provide a backup route to a route learned from a dynamic routing protocol? Explain: There are four basic types of static routes. Floating static routes are backup routes that are placed into the routing table if a primary route is lost.
A summary static route aggregates several routes into one, reducing the of the routing table. Standard static routes are manually entered routes into the routing table. Default static routes create a gateway of last resort. Explain: The C in a routing table indicates an interface that is up and has an IP address assigned. The S in a routing table signifies that a route was installed using the ip route command. Two of the routing table entries shown are static routes to a specific destination the The other entry S The entry with the 0.
Explain: OSPF has an administrative distance ofso the floating static route must have an administrative distance higher than Because the target network is Explain: A floating static route needs to have an administrative distance that is greater than the administrative distance of the active route in the routing table.
To be a backup route the floating static route must have an administrative distance greater than 90 and have a next hop address corresponding to the serial interface IP address of Branch1.
Compared with dynamic routes, what are two advantages of using static routes on a router? Choose two. Explain: Static routes are manually configured on a router. Static routes are not automatically updated and must be manually reconfigured if the network topology changes.Designed for students who do not meet the prerequisites for 2. Offered through the Student Learning Center. Summer: 6 weeks - 5 hours of lecture and 4. Final exam required. Standard measures of location, spread and association.
Normal approximation. Probability and sampling. Binomial distribution. Interval estimation. Some standard significance tests. Credit Restrictions: Students who have taken 2X, 5, 20, 21, 21X, or 25 will receive no credit for 2.
Summer: 6 weeks - 7. Terms offered: FallSummer 8 Week Session, SpringFallSpringSummer 8 Week Session Foundations of data science from three perspectives: inferential thinking, computational thinking, and real-world relevance. Given data arising from some real-world phenomenon, how does one analyze that data so as to understand that phenomenon?
The course teaches critical concepts and skills in computer programming and statistical inference, in conjunction with hands-on analysis of real-world datasets, including economic data, document collections, geographical data, and social networks. It delves into social and legal issues surrounding data analysis, including issues of privacy and data ownership. Prerequisites: This course may be taken on its own, but students are encouraged to take it concurrently with a data science connector course numbered 88 in a range of departments.
Emphasizes the use of computation to gain insight about quantitative problems with real data. Expressions, data types, collections, and tables in Python. Programming practices, abstraction, and iteration.
Visualizing univariate and bivariate data with bar charts, histograms, plots, and maps. Introduction to statistical concepts including averages and distributions, predicting one variable from another, association and causality, probability and probabilistic simulation. Relationship between numerical functions and graphs. Sampling and introduction to inference.
These include certain topics in: principles of data visualization; simulation of random processes; and understanding numerical functions through their graphs.Instructions for the Final Exam. The final exam covers all topics we have learned in class. The exam focuses equally on recent and old topics. Material covered after the second midterm will appear on the final exam. The final exam is designed to test your understanding of statistical procedures.
You may be given JMP output and asked to interpret it. Be sure that you are familiar with such output! For example, you may be given some problems with two or more sets of JMP output reporting the results of different analyses, and you have to choose the correct analysis. You do not need to memorize JMP commands or click-sequences for the exam.
You also will be asked some questions that are not attached to specific data. For example, you may be asked to design a particular study or to comment on the validity of statistical statements. During the exam, you are allowed to use two sheets of 8.
Both sides of the sheets can be used. The instructor will provide any tables that are needed. The exam is designed to take less than three hours, although you have the full three hours to complete it. A useful way to study for these exams is to study homwork problems. Often, the hardest and most crucial part of statistical analyses is deciding which inferential technique to use.
Thus, you may find it helpful to ask a friend to select problems from an introductory statistics textbook there are manyhave them cover up any instructions like "use a one-sample t-test to This simulates real-life, and it also simulates the exam.Nailing Your Undergraduate Statistics Exam (Video 2)
Practice final 1. Answers to practice final 1. Practice final 2. Answers to practice final 2.This would lead, for example, to a shift toward more healthy choices, more user-friendly products, and products and brands that better fit their personality. This could be a big opportunity for niche brandsand a threat to the mass-market brands that had won big in previous years by using scale and ubiquitous availability, supported by the trust gained by heavy advertising.
Our latest research certainly shows a decrease in consumption in categories deemed less healthy and a willingness to spend significantly more on health and more environmentally conscious categories. It also shows consumers are more likely to spend more to indulge themselves and more likely to try new technology.
While their consumption choices have become more individualistic, though, it is important to note that family values continue to be at the top of their priorities (Exhibit 3). One area our predictions missed, however, was by anticipating that consumers, as they became more individualistic in their choices, might focus less on basic product reliability and safety.
Perhaps in part because of a number of more recent food scandals, however, consumers seemed more concerned with these issues in 2015 than they were before. When our team first started researching Chinese consumers, nearly ten years ago, many of us were surprised by their fickle attitude toward brands.
Fewer than half of consumers tended to stick with their favorite brands, compared, for example, with almost three quarters of US consumers. As we debated this tendency while making our predictions, we wondered if, in the clash between pragmatism and individualism, brand loyalty would stay low, increase, or even decline.
Ultimately, we decided it would increase as the emotional benefits of brands became more important to consumers and as increased choice and availability of branded products (online and off) would allow consumers to optimize for price and convenience without changing choices too often.
Our recent research confirmed the changes we anticipated. Consumers are now significantly less likely to buy a brand that is not already among their favorites, continuing the upward trend we observed in 2011 (Exhibit 4). The modern shopper Our 2011 predictions were bullish on e-commerce, predicting that Chinese consumers would adapt their channel choices even faster than has occurred in developed markets. We estimated that by 2020, online consumer-electronics purchases would jump to 40 percent, from about 10 percent.
More mainstream categories would rise to 15 percent, and some categories, such as groceries (now below 1 percent), could reach about 10 percent. These changes are occurring even as the enduring pragmatism and diligence of the Chinese consumer continue to be in place. Our latest research shows that consumers of all age groups are much more likely to collect information online, even on fast-moving consumer goods, than they were just three years ago.
In 2015, online food and beverages sales (excluding fresh) reached 7. The online share of consumer-electronic purchases, meanwhile, has reached a whopping 39 percent in 2015, and it now looks possible that by 2020 it will be about 50 percent of overall sales.
Making predictions may be difficult, especially about the futureas US Baseball Hall of Famer Yogi Berra famously observed.