USA Today reported that the population mean life span of people who live in Hawaii is 77 years. A random sample of 20 obituary notices gave a sample mean life span of ?̅= 71.4 years and a sample standard deviation s = 20.65 years. Assuming that the life span of people in Hawaii is normally distributed, does this indicate that the population mean life span is less than 77 years? Use a 5% level of significance. a.) What is α? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? αα = H0: μ = H1: μ The test is a test b.) Identify the Sampling Distribution you will use. What is the value of the test statistic? The best sampling distribution to use is the distribution. The test statistic (z or t value) is = c.) Find or estimate the P-value for the test. The p-value is = d.) Conclude the test. Based on this we will the null hypothesis.
USA Today reported that the population mean life span of people who live in Hawaii is 77 years. A random sample of 20 obituary notices gave a sample mean life span of ?̅= 71.4 years and a sample standard deviation s = 20.65 years. Assuming that the life span of people in Hawaii is
a.) What is α? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test?
αα =
H0: μ =
H1: μ
The test is a test
b.) Identify the Sampling Distribution you will use. What is the value of the test statistic?
The best sampling distribution to use is the distribution.
The test statistic (z or t value) is =
c.) Find or estimate the P-value for the test.
The p-value is =
d.) Conclude the test.
Based on this we will the null hypothesis.
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