According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange County police officer feels that this percentage is different in Orange County. To test this, he randomly selects 120 people living in Orange County who are 25 or older and finds that 48 of them have been arrested. Test the police officer's claim at the a-0.05 level of significance.

A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 303 people over the age of 55, 79 dream in black and white, and among 284 people, under the age of 25, people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. dream in black and white. Use a 0.05 significance level to test the claim that the proportion of vvnat is tne conciusion pasea on tne contiaence intervai? Because the confidence interval limits V 0, it appears that the two proportions are Because the confidence interval limits include values, it appears that the proportion of people over 55 who dream in black and white is V the proportion for those under 25. c. An explanation for the results is that those over the age of 55 grew up exposed to media that was displayed in black and white. Can these results be used to verify that explanation? O A. Yes. The results can be used to verify the given…

What proportion of students have a meal plan on campus? A local university claimed that 70% of students had a campus meal plan. A random sample of 30 students found that 24 of them had a meal plan on campus. Use this sample to test the claim. Use a level of significance of 0.1.

The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.

A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 314 people over the age of​ 55, 73 dream in black and​ white, and among 291 people under the age of​ 25, 12 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts​ (a) through​ (c) below. a. Test the claim using a hypothesis test. b. Test the claim by constructing an appropriate confidence interval. The 98% confidence interval is

The National Football League (NFL) is conducting a survey of fan behavior by collecting a random sample of 240 NFL fans. One question asks fans if they have ever participated in a violent act in or around their favorite team's stadium. Nationally, 28% of NFL fans have participated in a violent act around their team’s stadium. The research finds that 14% of Green Bay Packers fans have committed a violent act on game day. Conduct a significance test to answer the research question: Is there a significant difference (a=.05) in the proportion of Green Bay Packers fans compared to the rest of the NFL fans that have participated in a violent act?    Which of the following test requirements does NOT belong in Step One for this test?  Random sample Interval ratio variable of violent acts Normal Sampling distribution What is the critical score? What is the obtained score?

A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?

A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 285 people over the age of 55, 68 dream in black and white, and among 307 people under the age of 25, 14 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. An explanation for the results is that those over the age of 55 grew up exposed to media that was displayed in black and white. Can these results be used to verify that explanation?   A. Yes. The results can be used to verify the given explanation because the difference in proportions is practically significant.   B. Yes. The results can be used to verify the given explanation because the difference in proportions is statistically significant.   C. No. The results speak to a possible difference between the proportions of people over 55 and under 25 who dream in…