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8. According to a recent survey, the average annual income in the United States is $55,000 with a standard deviation of $10,500. a. Describe the sampling distribution of all sample means of size 5. b. Describe the sampling distribution of all sample means of size 55. c. Using StatCrunch or a calculator, calculate the probability of the mean of a sample size of 55 being between $54,000 and $56,000. Page 10. Suppose a consumer product researcher wanted to find out whether highlighters lasted longer than the manufacturer's claim that the highlighters could write continuously for 14 hours. The researcher tested a random sample of 40 highlighters and recorded the number of continuous hours each highlighter wrote before drying up. At the 5% level of significance, test the hypothesis that the highlighters wrote for more than 14 continuous hours. Following are the summery statistics: *= 14.5 hours, s = 1.2 hours Step 1: Write a statement defining the null and alternative hypothesis Step 2: CLT Check Step 3 Convert the sample statistic to a test statistic and calculate the probability to value) - The correct type of test statistics: t-scorer-score (Circle correct answer) Show calculations test statistic value D-value Step 4: Interpret and state conclusion MacBook Pro

          8. According to a recent survey, the average annual income in the United States is $55,000 with a standard deviation of $10,500. a. Describe the sampling distribution of all sample means of size 5. b. Describe the sampling distribution of all sample means of size 55. c. Using StatCrunch or a calculator, calculate the probability of the mean of a sample size of 55 being between $54,000 and $56,000. 
Page 10. Suppose a consumer product researcher wanted to find out whether highlighters lasted longer than the manufacturer's claim that the highlighters could write continuously for 14 hours. The researcher tested a random sample of 40 highlighters and recorded the number of continuous hours each highlighter wrote before drying up. At the 5% level of significance, test the hypothesis that the highlighters wrote for more than 14 continuous hours. Following are the summery statistics: *= 14.5 hours, s = 1.2 hours Step 1: Write a statement defining the null and alternative hypothesis Step 2: CLT Check Step 3 Convert the sample statistic to a test statistic and calculate the probability to value) - The correct type of test statistics: t-scorer-score (Circle correct answer) Show calculations test statistic value D-value Step 4: Interpret and state conclusion MacBook Pro

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