1) A large, national study conducted in 2007 reported that the mean systolic blood pressure for adult males was 130. In 2008, an investigator hypothesized that due to financial meltdown and stress, systolic blood pressures have increased. In order to test this hypothesis (i.e., that the mean systolic blood pressure increased in 2008), a sample was collected of 100 adults. The mean and the st.dev of the sample is 135 and 10.2 respectively. (a) Test the hypothesis at 0.05 level of significance. (b)Find the p-value of the test in (a) and draw conclusion using the p-value. (c) Estimate the mean systolic blood pressure in 2008 using 95% confidence interval. Can you support the hypothesis claim from this interval? Explain.

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1) A large, national study conducted in 2007 reported that the mean systolic blood
pressure for adult males was 130. In 2008, an investigator hypothesized that due
to financial meltdown and stress, systolic blood pressures have increased. In order
to test this hypothesis (i.e., that the mean systolic blood pressure increased in
2008), a sample was collected of 100 adults. The mean and the st.dev of the
sample is 135 and 10.2 respectively.
(a) Test the hypothesis at 0.05 level of significance.
(b)Find the p-value of the test in (a) and draw conclusion using the p-value.
(c) Estimate the mean systolic blood pressure in 2008 using 95% confidence
interval. Can you support the hypothesis claim from this interval? Explain.
Transcribed Image Text:1) A large, national study conducted in 2007 reported that the mean systolic blood pressure for adult males was 130. In 2008, an investigator hypothesized that due to financial meltdown and stress, systolic blood pressures have increased. In order to test this hypothesis (i.e., that the mean systolic blood pressure increased in 2008), a sample was collected of 100 adults. The mean and the st.dev of the sample is 135 and 10.2 respectively. (a) Test the hypothesis at 0.05 level of significance. (b)Find the p-value of the test in (a) and draw conclusion using the p-value. (c) Estimate the mean systolic blood pressure in 2008 using 95% confidence interval. Can you support the hypothesis claim from this interval? Explain.
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