8 points) Identify the critical t. An independent reedom and the crtical random sample is selected from an approximately normal population with unknown standard deviation. Find the degrees of selected from an t value for the given sample size and confidence level. Round critical t values to 3 decimal places Sample size, n Conflidence level Degree of Freedom Critical value, 12 90 95 98 27 17

Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman. Assume that the paired sample data is a simple random sample and that the differences have a distribution that is approximately normal. Use a 0.10 significance level to test for a difference between the measurements from the two arms. What can be concluded? Right arm 142 132 127 137 130 D Left arm 174 172 184 137 147 O A. Ho: Hd =0 B. Ho: Ha 0 H1: Hd =0 %3D OC. Ho: Hd = 0 H1: Hd 0 Identify the test statistic. (Round to two decimal places as needed.) t= Identify the P-value. P-value = (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test?

Assum a sample is used to estimate a populatation mean.  Find the 95% confidence interval for a sample size of 41 with a mean of 64.2 and a standard deviation of 13.4.  Enter answer as an open interval (i.e. parentheses) accurate to 3 decimal places.

Find the critical value tc for a 95% confidence level when the sample size is 18. Use Table 4 on page A10 (Appendix)   A. 1.740   B. 2.110   C. 2.101   D. 1.734

Decide whether the normal sampling distribution can be used. If it can be​ used, test the claim about the difference between two population proportions p1 and p2 at the given level of significance α using the given sample statistics. Assume the sample statistics are from independent random samples.   ​Claim: p1=p2​, α=0.10 Sample​ statistics: x1=142​, n1=156 and x2=144​, n2=188 Find the standardized test statistic. Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.

A sample of 19 elements was used to construct a 99% confidence interval for the population variance, the chi-square value (s) used for this test are: Select one: a. 7.015 to 34.805 b. 7.633 to 36.191 O c. 6.844 to 38.582 d. 6.265 to 37.156 ge Next page ETIVITY NEXT ACTIVITY Jump to. Midterm 1

What is the Test Statistic and P-Value?

The number of unhealthy days based on the AQI (air quality index) for a random sample of metropolitan areas is shown. Construct an 80% confidence interval based on the data. Assume the variable is normally distributed. 23, 21, 14, 5, 40, 61, 39, 1, 0, 16