Takeout Food A magazine article reported that 14% of adults buy takeout food every day. A fast-food restaurant owner surveyed 220 customers and found that 44 said that they purchased takeout food every day. At =α0.05, is there evidence to believe the article's claim? Use the critical value method with tables. Do not round intermediate steps. State the hypotheses and identify the claim. H0: Claim or not a Claim H1: Claim or not a claim One- tailed or two tailed Critical Value: Test Value: z=

Takeout Food A magazine article reported that 14% of adults buy takeout food every day. A fast-food restaurant owner surveyed 220 customers and found that 44 said that they purchased takeout food every day. At =α0.05, is there evidence to believe the article's claim? Use the critical value method with tables. Do not round intermediate steps. State the hypotheses and identify the claim. H0: Claim or not a Claim H1: Claim or not a claim One- tailed or two tailed Critical Value: Test Value: z=

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A business has just completed a marketing campaign. They want to determine if their original market share of 50% has increased as a result of the campaign. A survey conducted found 81 out of 150 people had bought the products. Determine whether the company has increased its market share - Use either the p-value or the z statistic conduct the test. Has the market share of the company increased?- The marketing team plan to continue to monitor their market share. In a future study, they want to be able to estimate their market share to within +/−5% and with 90% confidence. What size sample is required? Use the sample proportion from part ii.
A survey was developed to estimate the average number of hours per week that adults spend exercising. Every third person entering a large fitness complex was surveyed, with a total of 2,500 people being surveyed. The data showed that the mean number of hours spent exercising was 3.2 hours per week. Which characteristic of the survey could create a bias in the results? The size of the sample The size of the sample The method of analyzing the data The method of analyzing the data The method of choosing the people who were surveyed The method of choosing the people who were surveyed The size of the population
State the hypotheses and identify the claim. Compute the test statistic Find the P-value. Make the decision. Write the conclusion. Assume all populations are normally distributed. Test all claims at 0.05. 7. In a random sample of 1020 U.S adults in a recent year, 459 approve of the job the Supreme Court is doing. In another random sample 1510 U.S. adults taken 3 years prior, 694 approved of the job the Supreme Court is doing. Can you support the claim that the proportion of U.S. adults who approve of the job the Supreme Court is doing is less than it was 3 years prior?
The average home in the US is expected to cost $240,000. A random sample of 56 homes sold this month showed average price of $232,000. Assume you have access to this data. We are interested in determining cost if the cost of average home has decreased this month. If the test statistic is -1.66 what is the p-value?
A company that has a 10% market share (they sell their product to 10% of all potential buyers) launches a marketing campaign. At the end of the campaign period, the company conducts a survey in order to assess whether its market share has increased. The result of the survey issued to 500 customers was 12.5%.h0= p=0.10, h1= p>0.10test statistic= 1.86P value= 0.0314 a. State your conclusion using ΅ = 0.05.b. What would be the potential Type I and Type II errors in this problem? Explain these possible errors in context.
claim: Most adults would not erase all of their personal information online if they could. A software firm survey of 585 randomly selected adults showed that 49.3% of them would erase all of their personal information online if they could. Make a subjective estimate to decide whether the results are significantly low or significantly high, then state a conclusion about the original claim.
Identify the test statistic. Identify the P-value. State the final conclusion that addresses the original claim.
PrActicE the legalization of marijuana. Among the Democratic voters surveyed, 158 of the 200 people aged 18-29 and 210 of the 300 people aged 50-64 supported legalizing marijuana. Is this difference significant at a = .05? A random sample of individuals in one town was surveyed about their position on
A random sample of 50 households was selected for a telephone survey. The key question asked was “Do you or any member of your household own a cellular phone that you can use to access the Internet?” Of the 50 respondents, 20 said “yes” and 30 said “no”. Determine the proportion of households with cellular phone that can be used to access Internet. If the population proportion is 0.45, determine the standard error of proportion.
You are testing the claim that the proportion of men who own cats is larger than the proportion of women who own cats. You sample 70 men, and 30% own cats. You sample 170 women, and 60% own cats. test statistic = [three decimal accuracy]
You are testing the claim that the proportion of men who own cats is smaller than the proportion of women who own cats.You sample 90 men, and 80% own cats.You sample 110 women, and 70% own cats. test statistic = [three decimal accuracy]
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