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This following is the print out for the variable, DISTANCE_2, from the MAT 131 Student Survey. This variable was the responses for the question, “What is the distance (in miles) from your home to the College?”. Assume that the sample is representative of all students taking Statistics 1 at Cincinnati State. 95% confidence interval results: Variable Sample Mean Std. Err. DF L. Limit U. Limit DISTANCE_2 13.872011 0.82889538 183 12.23659 15.507431 Is it likely that true mean distance from home to College for all students at Cincinnati State taking MAT 131 is greater than 20 miles? Explain.

Would the standard error likely get larger or smaller if the sample size were increased? Explain.

This following is the print out for the variable, DISTANCE_2, from the MAT 131 Student Survey. This variable was the responses for the question, “What is the distance (in miles) from your home to the College?”. Assume that the sample is representative of all students taking Statistics 1 at Cincinnati State. 95% confidence interval results: Variable Sample Mean Std. Err. DF L. Limit U. Limit DISTANCE_2 13.872011 0.82889538 183 12.23659 15.507431 What is the margin of error for this confidence interval? Round to two decimal places.

A researcher wants to determine if the average cholesterol level in his city is different from the national average of 195. Draw a conclusion about the cholesterol levels in the research’s city at the significance level of 0.01. Test of Ho:  μ = 195 vs H1:  μ ≠ 195n     Mean    T-stat    p-value 50   198       1.77       0.0768

Suppose a 95% confidence interval for the population proportion of American adults who exercise regularly is 0.29 to 0.37. Which one of the following statements is FALSE?

A journal article reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in a particular town. A random sample of 233 fathers from this town yielded 96 who did not help with child care. What is the null and alternative hypotheses?

A test of significance with alpha = 0.05 results in a p-value of 0.1. What do you conclude?

Using question 5, what is the best point estimate for the population mean?

To continue the study into the drinking habits of adults, the researcher decides to collect data from adults working in “blue collar” jobs to see whether their drinking habits are in the same proportion as the general public. The null hypothesis for this test is H0:  p = 0.26 and the alternative hypothesis is H1: p > 0.26. The researcher collected data from a random sample of 90 adults with “blue collar” jobs of which 30 stated that they drank once a week or less in the last month. Find the values of the sample proportion, the test statistic, and the p-value associated with the test statistic.

How many times should we gently invert the tubes to ensure proper blood/additive mix?