state your process within StatCrunch for each problem.

1. A sample of 412 adults showed that 293 of them are connected to the Internet from home. Construct and interpret a 90% confidence interval for the proportion of all adults that have Internet access at home.

2. Over the past week, I measured the resting heartrates of 24 women ages 30 - 50 and got the following data measured in beats per minute:

61, 63, 64, 65, 65, 67, 71, 72, 73, 74, 75, 77, 79, 80, 81, 82, 83, 83, 84, 85, 86, 86, 89, 95

My claim is that the variance of heart rates for women ages 30 - 50 is different than 12 beats per minute. Is there enough evidence to support my claim? Test at the 0.05 level of significance.

Step 5: There __________ sufficient evidence to conclude that __________________

3. An instructor tells her statistic classes that the following is the historical breakdown of grades on test 1, and that this class should expect the same.

A= 6% B= 14% C= 36% D= 24% F= 20%

A student believes that this is merely a motivating ploy to encourage students to study harder. 150 students take the first exam, producing the following observed results.

A= 27 B= 33 C= 57 D= 18 F= 15

At the 0.05 level of significance, test the claim that the instructor's information about the grade breakdown on test 1 is not correct.

Expected Values = n(%)

Path: Stat -> Goodness of Fit -> Chi Square Test

Step 5: There __________ sufficient evidence to conclude that __________

4. A survey of 65 beer drinkers ages 21-29 had a mean of 22.7 servings of beer during the last month, with a standard deviation of 8.49 servings. A survey of 107 beer drinkers ages 30-39 had a mean of 19.8 servings of beer during the last month, with a standard deviation of 6.21 servings. At the 0.05 level of significance, test the claim that the mean monthly beer consumption of beer drinkers ages 21-29 is greater than the mean monthly beer consumption of beer drinkers ages 30-39.

Step 5: There __________ sufficient evidence to conclude that __________________

5. A statistics instructor, when asked how students do on the first statistics exams claims that the mean score for all students on the first exam is less than 75. To test this claim, 22 students are selected at random. Their scores from the first exam had a mean of 74.2 with a standard deviation of 13.95. Test the instructor's claim at the 0.01 level of significance.

Step 5: There __________ sufficient evidence to conclude that __________________

6. A random sample of 2000 Americans adults showed that 658 had a college degree. Another sample of 1500 Canadian adults revealed that 426 had a college degree. At the 0.01 level of significance, test the claim that the proportion of adults that have a college degree is higher in the U.S. than it is in Canada.

Step 5: There __________ sufficient evidence to conclude that