An education specialist was studying SAT verbal scores at a local university. She found the following 95% confidence interval for the population mean score for SAT verbal: (450, 550).   She also conducted a significance test at Ho: mu = 445 versus Ha: mu does not equal 445. The p-value for this test was 0.0007. Which of the following statements accurately describes this situation?

A nutritionist was interested in studying American’s opinions about healthy eating. One hundred randomly selected people who were starting a diet whre asked if they ate three servings of whole grains a day. After six months, the same 100 people were asked if they ate three servings of whole grains a day. Besides random sampling and categorical data, what other assumption needs to be met? Is it met?   Six months later “Yes, ate whole grains” Six months later “No, did not” Initial Response “Yes, ate whole grains” 36 15 Initial Response “No did not” 7 42

The General Social Survey asked 612 men (group 1) and 292 women (group 2) if they have been too exhausted from housework to do a good job at work. The 95% confidence interval for

A study was done to see if students who took AP Calculus  before taking the AP statistics course did better than students who did not take AP Calculus. They wanted to see if there was a difference in the AP Statistics exam scores. The p-value was zero. What does this mean?

Is there a difference in the attitude scores (1-10) about learning statistics between underclassmen and upperclassmen students?  What would be the correct alternative hypothesis?

A nutritionist was interested in studying American’s opinions about healthy eating. One hundred randomly selected people who were starting a diet were asked if they ate five servings of fruit or vegetables a day. After six months, the same 100 people were asked if they ate five servings of fruit or vegetables a day.   Six months later “Yes, ate 5 servings” Six months later “No, did not eat five servings” Initial Response “Yes, ate five servings” 20 50 Initial Response “No did not eat five servings” 17 13  What is the sample proportion that did NOT eat 5 servings a day six months later?

A nutritionist was interested in studying American’s opinions about healthy eating. One hundred randomly selected people who were starting a diet were asked if they ate five servings of fruit and vegetables every day. After six months, the same 100 people were asked if they ate five servings of fruits and vegetables a day. What is the value of the test statistic?   Six months later “Yes, ate five servings of fruit and vegetables” Six months later “No, did not” Initial Response “Yes, ate five servings” 44 14 Initial Response “No did not” 35 7

Suppose that you have the following hypothesis: Ho:

In 2012, the General Social Survey included a question that asked participants how many hours they worked a week on household chores. Do females spend more hours working on household chores than males?   Would this be an example of independent or dependent samples?

In 2000, General Social Survey respondents were asked “How many hours did they spend on their personnel computer per week?”. The researchers were interested in seeing if Republicans (1) spent a different amount of time on the personnel computer then Democrats (2).  For this hypothesis, the p-value was 0.9947. Interpret.