5.8 visits per year? Use the P-value llellou Number of Jobs The U.S. Bureau of L

Question

5.8 visits per year? Use the P-value llellou Number of Jobs The U.S. Bureau of Labor and Statis- tics reported that a person between the ages of 18 and 34 has had an average of 9,2 jobs. To see if this average is correct, a researcher selected a random sample of workers between the ages of 18 and34 and asked how many different places they had worked. The resulis wer as follows: 8 12 15 6 1 9 13 At d 005, can it be concluded that the mean is 9.27 Use the P-value method. Give one reason why respondents might not have given the exact n jobs that they have worked number of

Explanation / Answer

Standard deviation = 4.74

Given,

Null hypothesis: Average jobs is equal to 9.2

alternative hypothesis: true mean is not equal to 9.14

mu = 9.2

SD=4.74

x-bar=9.14

SE = SD / sqrt(n) , where n is the sample size

Solution:

test statistic : t = 0.0015945,

df = 6,

p-value = 0.9988
95 percent confidence interval:
4.75825 13.52746

Conclusion: Since p-value is 0.9988 , which greater than 0.05 , hence we accept the null hypothesis and conclude that average job is equal to 9.2.

8 12 15 6 1 9 13 avearge 9.14

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