Business Analytics
3rd Edition
ISBN: 9780135231715
Author: Evans
Publisher: PEARSON
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Chapter 5, Problem 43PE
The actual delivery time from Giodanni’s Pizza is exponentially distributed with a
- What is the
probability that the delivery time will exceed - What proportion of deliveries will be completed within
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A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support labeling
legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion.
(a) No preliminary estimate is available. Find the minimum sample size needed.
(b) Find the minimum sample size needed, using a prior study that found that 65% of the respondents said they support
labeling legislation for GMOs.
(c) Compare the results from parts (a) and (b).
...
(a) What is the minimum sample size needed assuming that no prior information is available?
n =
(Round up to the nearest whole number as needed.)
The table available below shows the costs per mile (in cents) for a sample of automobiles. At a = 0.05, can you conclude that at least one mean
cost per mile is different from the others?
Click on the icon to view the data table.
Let Hss, HMS, HLS, Hsuv and Hмy represent the mean costs per mile for small sedans, medium sedans, large sedans, SUV 4WDs, and minivans
respectively. What are the hypotheses for this test?
OA. Ho: Not all the means are equal.
Ha Hss HMS HLS HSUV HMV
B. Ho Hss HMS HLS HSUV = μMV
Ha: Hss *HMS *HLS*HSUV * HMV
C. Ho Hss HMS HLS HSUV =μMV
= =
H: Not all the means are equal.
D. Ho Hss HMS
HLS HSUV HMV
Ha Hss HMS
HLS =HSUV = HMV
Question: A company launches two different marketing campaigns to promote the same product in two different regions. After one month, the company collects the sales data (in units sold) from both regions to compare the effectiveness of the campaigns.
The company wants to determine whether there is a significant difference in the mean sales between the two regions. Perform a two sample T-test
You can provide your answer by inserting a text box and the answer must include:
Null hypothesis,
Alternative hypothesis,
Show answer (output table/summary table), and
Conclusion based on the P value.
(2 points = 0.5 x 4 Answers)
Each of these is worth 0.5 points. However, showing the calculation is must. If calculation is missing, the whole answer won't get any credit.
Chapter 5 Solutions
Business Analytics
Ch. 5 - Lauren drinks a variety of soft drinks. Over the...Ch. 5 - A home improvement company in Cincinnati ran a...Ch. 5 - Consider the experiment of drawing two cards...Ch. 5 - Three coins are drop on a table. List all possible...Ch. 5 - A market research company surveyed consumers to...Ch. 5 - Refer to the card scenario described in Problem 3....Ch. 5 - Refer to the coin scenario described in Problem 4....Ch. 5 - Prob. 8PECh. 5 - Prob. 9PECh. 5 - An airline tracks data on its flight arrivals....
Ch. 5 - A survey of 200 college graduates who have been...Ch. 5 - Prob. 12PECh. 5 - A survey of shopping habits found the percentage...Ch. 5 - A Canadian business school summarized the gender...Ch. 5 - Prob. 15PECh. 5 - Use the Civilian Labor Force data in the Excel...Ch. 5 - Prob. 17PECh. 5 - A home pregnancy test is not always accurate....Ch. 5 - In the scenario in Problem 3, what is the...Ch. 5 - In the roulette example described in Problem 8,...Ch. 5 - Prob. 21PECh. 5 - An investor estimates that there is a 1in10 chance...Ch. 5 - The weekly demand of a slow-moving product has the...Ch. 5 - Construct the probability distribution for the...Ch. 5 - Based on the data in the Excel file Consumer...Ch. 5 - A major application of analytics in marketing is...Ch. 5 - The Excel file Call Center Data shows that in a...Ch. 5 - If a cell phone company conducted a telemarketing...Ch. 5 - During one year, a particular mutual fund...Ch. 5 - A popular resort hotel has 300 rooms and is...Ch. 5 - A telephone call center where people place...Ch. 5 - A financial consultant has an average of eight...Ch. 5 - The number and frequency of Atlantic hurricanes...Ch. 5 - Prob. 34PECh. 5 - Prob. 35PECh. 5 - Prob. 36PECh. 5 - In determining automobile mileage ratings, it was...Ch. 5 - The distribution of SAT scores in math for an...Ch. 5 - A popular soft drink is sold in 2-liter...Ch. 5 - A supplier contract calls for a key dimension of a...Ch. 5 - Historical data show that customers who download...Ch. 5 - A lightbulb is warranted to last for 5,000 hours....Ch. 5 - The actual delivery time from Giodannis Pizza is...Ch. 5 - Apply the chi-square goodness of fit test to the...Ch. 5 - Apply the chi-square goodness of fit test to the...Ch. 5 - Compute the daily change of the closing price for...
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- In a survey of 2193 adults in a recent year, 1233 say they have made a New Year's resolution. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. The 90% confidence interval for the population proportion p is (Round to three decimal places as needed.) J.D) .arrow_forwardLet p be the population proportion for the following condition. Find the point estimates for p and q. In a survey of 1143 adults from country A, 317 said that they were not confident that the food they eat in country A is safe. The point estimate for p, p, is (Round to three decimal places as needed.) ...arrow_forward(c) Because logistic regression predicts probabilities of outcomes, observations used to build a logistic regression model need not be independent. A. false: all observations must be independent B. true C. false: only observations with the same outcome need to be independent I ANSWERED: A. false: all observations must be independent. (This was marked wrong but I have no idea why. Isn't this a basic assumption of logistic regression)arrow_forward
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