Stats Review
The director of market research at a large department store chain wanted to conduct a survey throughout a metropolitan area to determine the amount of time working women spend shopping for clothing in a typical month. Develop a first draft of the questionnaire needed in (a) by writing three categorical questions and three numerical questions that you feel would be appropriate for this survey. Write three numerical questions that you feel would be appropriate for this survey. Select all that apply. A. About how much money do you spend on clothing every year? B. How many children do you have? C. What is your favorite clothing store? D. About what is your yearly salary? E. What type of car do you own? F. Do you spend more time shopping for clothing online than at stores? G.How much do you enjoy shopping?
A. About how much money do you spend on clothing every year? B. How many children do you have? D. About what is your yearly salary?
Four coins are tossed. What does the sample space consist of? Which of the following identifies the sample space for the four flipped coins? A. Getting a head or a tail on any of the four coins B. Not getting a head on all coins C. Getting a head on any of the coins D. Getting a head on one coin and a tail on all others
A. Getting a head or a tail on any of the four coins
Four coins are tossed. Which of the following is a joint event? A. Getting a tail on the fourth coin and a tail on the second coin B. Getting a head or a tail on the third coin C. Not getting a head on the first coin D. Not getting a head on the second coin
A. Getting a tail on the fourth coin and a tail on the second coin
Four coins are tossed. a. Give an example of a simple event. Which of the following is a simple event? A. Getting a head on all coins B. Getting a head on the first coin C. Getting a tail on no coins D. Getting a head on the third coin and a head on the second coin
B. Getting a head on the first coin
A conglomerate corporation develops, manufactures, and markets a wide range of products, including medical diagnostic imaging devices, jet engines, lighting products, and chemicals. In 2013, the stock price rose 33.68%,and in 2014, the stock price declined 9.1%.If one purchased $1,000 of some social media stock at the start of 2013, its value would be $2,911.43 at the end of 2014. Compute the geometric mean rate of return per year of the two-year period 2013-2014.
The geometric mean rate of return is 10.23%per year.
Suppose the rate of return for a particular stock during the past two years was 5% and −40%. Compute the geometric mean rate of return.
The geometric mean rate of return is −20.6%.
A conglomerate corporation develops, manufactures, and markets a wide range of products, including medical diagnostic imaging devices, jet engines, lighting products, and chemicals. In 2013, the stock price rose 33.68%,and in 2014, the stock price declined 9.1%.If one purchased $1,000 of some social media stock at the start of 2013, its value would be $2,911.43 at the end of 2014. c. Compare the result of (b) to the value of the $1,000 of the social media stock. Choose the correct answer below and fill in the answer box to complete your choice. A. The value of the $1,000 invested in the conglomerate corporation's stock in 2014 was greater than that of the value of the $1,000 invested in the social media stock. The conglomerate corporation's stock would earn $nothing more than the social media's stock. B. The value of the $1,000 invested in the conglomerate corporation's stock in 2014 was less than that of the value of the $1,000 invested in the social media stock. The social media stock would earn $1696.28 more than the conglomerate corporation's stock.
B. The value of the $1,000 invested in the conglomerate corporation's stock in 2014 was less than that of the value of the $1,000 invested in the social media stock. The social media stock would earn $1696.28 more than the conglomerate corporation's stock.
The director of market research at a large department store chain wanted to conduct a survey throughout a metropolitan area to determine the amount of time working women spend shopping for clothing in a typical month. Develop a first draft of the questionnaire needed in (a) by writing three categorical questions and three numerical questions that you feel would be appropriate for this survey. Write three categorical questions that you feel would be appropriate for this survey. Select all that apply. A. About how much of your free time do you spend shopping? B. What is your favorite article of clothing to shop for? Your answer is correct. C. Do you shop online for clothing at least once a week? Your answer is correct. D. About what is your yearly salary? E. How many children do you have? F. How many days a week do you shop? G. Which of the following clothing stores have you visited in the past year?
B. What is your favorite article of clothing to shop for? Your answer is correct. C. Do you shop online for clothing at least once a week? G. Which of the following clothing stores have you visited in the past year?
Four coins are tossed. What is the complement of getting a tail on the first coin? Which of the following is the complement of getting a tail on the first coin? A. Getting a tail on the first coin and a head on all others B. Getting a head on all coins C. Getting a head on the first coin and a tail on all others D. Getting a head on the first coin
D. Getting a head on the first coin
The director of market research at a large department store chain wanted to conduct a survey throughout a metropolitan area to determine the amount of time working women spend shopping for clothing in a typical month. Indicate the type of data the director might want to collect. A. The director of market research could collect data about things like how much they enjoy shopping, whether they shop online or not, and their age. B. The director of market research could collect data about things like what they like to shop for, who they like to shop for, and the type of car they own. C. The director of market research could collect data about things like how much time they believe working women spend shopping and the type of places they like to shop. D. The director of market research could collect data about things like the amount of free time they have, the amount of money they make, and the amount of time spent shopping.
D. The director of market research could collect data about things like the amount of free time they have, the amount of money they make, and the amount of time spent shopping.
A conglomerate corporation develops, manufactures, and markets a wide range of products, including medical diagnostic imaging devices, jet engines, lighting products, and chemicals. In 2013, the stock price rose 33.68%,and in 2014, the stock price declined 9.1%.If one purchased $1,000 of some social media stock at the start of 2013, its value would be $2,911.43 at the end of 2014. b. If you purchased $1,000 of this conglomerate corporation's stock at the start of 2013, what was its value at the end of 2014?
The value of this stock at the end of 2014 was $1215.15
You want to select a random sample of n=1 from a population of three items (which are called A, B, and C). The rule for selecting the sample is as follows: Flip a coin; if it is heads, pick item A; if it is tails, flip the coin again; this time, if it is heads, choose B; if it is tails, choose C. Explain why this is a probability sample but not a simple random sample. Choose the correct answer below. A. This is a probability sample because the probability of each outcome is the same, but it is not a simple random sample because the N items in the frame were not partitioned into n groups of k items. B. This is a probability sample because the probability of each outcome is the same, but it is not a simple random sample because you cannot flip the same coin both times. C. This is a probability sample because the probability of each outcome is known, but it is not a simple random sample because there is a higher probability of picking item A than there is of picking item B or of picking item C. D.This is a probability sample because the exact probability of each outcome is unknown, but it is not a simple random sample because it is known that there is a higher probability of picking item A than there is of picking item B or of picking item C.
This is a probability sample because the probability of each outcome is known, but it is not a simple random sample because there is a higher probability of picking item A than there is of picking item B or of picking item C.
The following is a set of data for a population with N=10. 4, 3, 2, 3, 4, 11, 9, 9, 11, 8 a. Compute the population mean. b. Compute the population standard deviation.
a. 6.3 b. 3.29
Suppose that you measure the time it takes to download a video from the internet. a. Explain why the download time is a continuous numerical variable. b. Explain why the download time is a ratio scaled variable. a. Choose the correct answer below. A. Download time is a continuous numerical variable because it has values that can only be placed into categories. B. Download time is a continuous numerical variable because it has numerical values that arise from a measuring process. C. Download time is a continuous numerical variable because it has numerical values that arise from a counting process. Choose the correct answer below. A. Download times are categories in which no ranking is implied. B. Download times are numerical values that imply order but do not specify the amount of additional time that is added between higher levels. C. Download times are numerical values that imply order and the difference between the times is meaningful, but it does not have a true zero point. D. Download times are numerical values that imply order and also have a true zero point.
a. Download time is a continuous numerical variable because it has numerical values that arise from a measuring process. b. Download times are numerical values that imply order and also have a true zero point.
