Is the mean nursing salary for men and women with similar experience statistically significantly different? A significance test was conducted to test this claim. The p-value was 0.03. What can be said about the 95% confidence interval for the population mean difference?

A political scientist is interested in studying how Americans feel about having a female American president. He asks 100 liberals and 100 conservatives if they would vote for a women president. The political scientist hypothesized that more liberals(1) would vote for a women president than conservatives(2). What would be the correct null and alternative hypothesis?

A nutritionist was interested in studying American’s opinions about healthy living. One hundred randomly selected people who were starting a diet were asked if they consumed at least 24 ounces of water a day. After six months, the same 100 people were asked if they consumed at least 24 ounces of water a day   Six months later “Yes, consumed at least 24 ounces of water” Six months later “No, did not” Initial Response “Yes, consumed at least 24 ounces of water” 50 4 Initial Response “No did not” 10 36  Besides random sampling, what other assumption needs to be met? Is it met?

A vice principal at a high school was studying ACT scores at a local university. She found the following 95% confidence interval for the population mean score for ACT scores: (28, 32). She also conducted a significance test at Ho: mu = 30 versus Ha: mu does not equal 30. The p-value for this test was 0.17.   Which of the following statements accurately describes this situation?

A press organization was interested in studying how people’s voting habits change over the course of an election year. The same one hundred randomly selected registered voters were asked 3 and 6 months out if they had decided who they were going to vote for in the presidential election. Would this be an example of independent or dependent samples?

A political scientist is interested in studying how Americans feel about having a female American president. He asks 100 males(1) and 100 females(2) if they would vote for a women president. Is there a significant difference in how women and men would vote? What would be the correct alternative hypothesis?

Researchers want to determine if there is a connection between choice of musical instruments and gender. They want to see if the proportion of men (m) who play the flute is different from the proportion of women (f) who play the flute. They find that the p-value is 0.11.   What can be said about the 99% confidence interval for the population mean difference?

In 2000, the General Social Survey asked participants if they had looked up information about a political campaign on the internet. Out of 123 men, 49 said yes. Out of 120 women, 65 said yes. Suppose that a significance test for Ho:p1-p2=0 versus Ha:p1-p2 does not equal 0 was computed. What would be the pooled proportion?

For the hypothesis statements, Ho:p1-p2=0 versus Ha:p1-p2 > 0 if the TS equals 2.3, what is the p-value?  

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 1.0. What does this mean?