CareerBuilder.com conducted a survey of 2245 employers asking if they had fired an employee for shopping online while at work. 257 employers said they had fired an employee for online shopping while at work. A manager at a local recruiting agency claims that more than 10% of employers fire an employee for online shopping while at work. Does the sample data provide evidence to support this manager’s claim at α=0.05? You will solve this problem by providing answers to the following questions. Run the correct hypothesis test (state your calculator command or Excel formula used) and provide the information below. Give the correct symbols AND numeric value of each of the following (round answers to 3 decimal places). Calculator command or Excel formula: Test Statistic: Critical value [HINT: this is NOT , show your work]: p-value:
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To determine if the sample data provides evidence to support the manager's claim that more than 10% of employers fire an employee for online shopping while at work, we will conduct a hypothesis test for a proportion. Show more…
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Part 1) SHOPPING AT WORK, LOSE YOUR JOB? – 8 pts CareerBuilder.com conducted a survey of 2245 employers asking if they had fired an employee for shopping online while at work. 257 employers said they had fired an employee for online shopping while at work. A manager at a local recruiting agency claims that more than 10% of employers fire an employee for online shopping while at work. Does the sample data provide evidence to support this manager’s claim at α = 0.05? A. Is this a test for a population proportion or a population mean? B. What distribution is used to conduct this test? C. Is this a left-tailed, right-tailed, or two-tailed test? State AND verify all assumptions required for this test. [HINT: This test should have four assumptions to be verified.] State the null and alternate hypotheses for this test: (use correct symbols and format!) Null hypothesis: Ho: Alternate hypothesis: Ha: Run the correct hypothesis test and provide the information below. Give the correct symbols AND numeric value of each of the following (round answers to 3 decimal places). Test Statistic: Critical value [HINT: this is NOT α]: p-value: State your statistical decision (Justify it using the p-value or critical value methods!) and interpret your decision within the context of the problem. What is your conclusion? Find a 95% confidence interval for the proportion of employers who fire employees shopping online at work. Interpret this interval in context to the manager’s claim above. (Hint: Does 10% lie in the interval?) Show calculator command and/or formula used to get the answer.
Kari H.
In a survey conducted by CareerBuilder.com, employers were asked if they had ever fired an employee for holiday shopping online while at work. Of the 1279 randomly selected employers who participated in the survey, 262 said they had fired an employee for shopping online while at work. Do the data provide convincing evidence that more than 1/5 of employers have fired an employee for shopping online at work? Test the relevant hypotheses using a 5% significance level.. Question 1. Please use this format: Ho: (null hypothesis in words) Ha: (alternative hypothesis in words) (2 points each for correct hypothesis statements, 1 point for the correct numerical value) is the Normal model a good fit for the sampling distribution? 1) Answer the question (1 point) 2) Show all relevant calculations (2 points) 3) Summarize your findings that support your answer to this question. (2 points)
Rashmi S.
Joshua A.
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