76 percent of Americans consider themselves Christian, 4 percent other religion, and the rest have no religion. Is this distribution the same in California? 800 Californians were surveyed.

76 percent of Americans consider themselves Christian, 4 percent other religion, and the rest have no religion. Is this distribution the same in California? 800 Californians were surveyed.

Chi-Square Test for G.O.F.

Is the type of music that people listen to related to the state that they were born in? 10,000 Americans were asked what type of music they listened to and where they were born.

Is the type of music that people listen to related to the state that they were born in? 10,000 Americans were asked what type of music they listened to and where they were born.

Chi-Square test for Independence

Before the passage of the new business assistance act, 65% of all new businesses closed their doors within one year of opening. 52 businesses that have opened since are being tracked. Has the business failure rate declined since the passage of the act?

Before the passage of the new business assistance act, 65% of all new businesses closed their doors within one year of opening. 52 businesses that have opened since are being tracked. Has the business failure rate declined since the passage of the act?

1-prop z-test

How many mph over the speed limit does the average car travel? Police officers randomly clocked 850 cars.

How many mph over the speed limit does the average car travel? Police officers randomly clocked 850 cars.

1 sample t-int

A new treatment is being tested to see how much more effective it is in curing people with the Ebola virus. The old treatment has a 34% success rate. 55 people infected with Ebola were given the new treatment.

A new treatment is being tested to see how much more effective it is in curing people with the Ebola virus. The old treatment has a 34% success rate. 55 people infected with Ebola were given the new treatment.

1-prop z-interval

What is the average voter turnout during an election? 38 cities reported their voter turnout during the last election.

What is the average voter turnout during an election? 38 cities reported their voter turnout during the last election.

t-interval

How much better has the NASDAQ done than the Dow Jones industrial this year? The daily point gains and losses have been charted since January 2.

How much better has the NASDAQ done than the Dow Jones industrial this year? The daily point gains and losses have been charted since January 2.

2 sample t-interval

75 college students and 75 high school students were asked what percent of their free time is spent watching television. Determine a confidence interval for how much more high school students spend watching television than college students.

75 college students and 75 high school students were asked what percent of their free time is spent watching television. Determine a confidence interval for how much more high school students spend watching television than college students.

2-sample t-interval

What is the difference between the crime rates for African Americans vs. Caucasians? 4000 African Americans and 4000 Caucasians were observed for five years to see if they committed a crime.

What is the difference between the crime rates for African Americans vs. Caucasians? 4000 African Americans and 4000 Caucasians were observed for five years to see if they committed a crime.

2-prop z-interval

A fire scientist wants to know if there is a relationship between the number of staff that are at the fire station and the amount of time it takes for the fire engine to leave the station when an emergency call is received.

A fire scientist wants to know if there is a relationship between the number of staff that are at the fire station and the amount of time it takes for the fire engine to leave the station when an emergency call is received.

t-test for slope (regression)

Do people who wear hats spend more money at the mall than people who do not wear hats? 300 of each were followed.

Do people who wear hats spend more money at the mall than people who do not wear hats? 300 of each were followed.

2-sample t-test (independent)

Is the flu shot effective? 1000 people who were given the flu shot and 2000 who were not were asked six months later if they got the flu over the past six months.

Is the flu shot effective? 1000 people who were given the flu shot and 2000 who were not were asked six months later if they got the flu over the past six months.

2-prop z-test

Do wives spend more money on nonessentials than their husbands? 90 couples were observed.

Do wives spend more money on nonessentials than their husbands? 90 couples were observed.

Matched Pairs t-test

75 people were questioned about their age and the amount they have already saved for retirement. Based on this data, can you provide a range of values that your 36 year old instructor has likely saved for retirement?

75 people were questioned about their age and the amount they have already saved for retirement. Based on this data, can you provide a range of values that your 36 year old instructor has likely saved for retirement?

t-interval for slope (regression)

Do men and women watch different television shows? 780 men and 650 women who watched TV on Wednesday at 8:00 PM were asked what show they watched.

Do men and women watch different television shows? 780 men and 650 women who watched TV on Wednesday at 8:00 PM were asked what show they watched.

Chi-Square test for Homogeneity