Assume that we ran an experiment on providing free access to netflix to college students and...

Assume that we ran an experiment on providing free access to netflix to college students and we wanted to know how it will impact their exam scores. We gave 400 student free access to Netflix and 400 students did not get it for free.

a. If the average exam score for treatment students is 85 and the average exam score for control students is 80, while the standard deviation for each group is 60, what would the 95% confidence intervals be for the average of each group? (To be accurate please use 1.96 SE’s to compute the intervals).

b. Is there a statistically significant difference between the two groups? Why?

c. Imagine instead that the standard deviation for each group was 40. What would be the lowest grade possible (whole number) that the treatment group could get where we would still be able to detect a statistically significant difference?

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Student loans: The Institute for College Access and Success reported that 69% of college students in...

Student loans: The Institute for College Access and Success reported that 69% of college students in a recent year graduated with student loan debt. A random sample of 85 graduates is drawn. Use Cumulative Normal Distribution Table as needed. Round your answers to at least four decimal places if necessary. a. Find the probability that less than 56% of the people in the sample were in debt. b. Find the probability that between 60% and 75% of the people in...

Free College? Is College Worth the Money? Should it be free? How can we make it...

Free College? Is College Worth the Money? Should it be free? How can we make it happen in America? What are the pros and cons? TAKE A SIDE AND PROVE YOUR POINT OF VIEW. (1 paragraph)

Suppose a politician proposes that we make college education free for all students. What impact would...

Suppose a politician proposes that we make college education free for all students. What impact would this proposal have on the level of human capital and the rate of growth in the country? Several societies around the world make it very difficult for women and girls to become educated. What impact would this have on economic growth in these countries? Suppose that the government decides to cut spending on research and development. What impact would this have on future economic...

We ran a recrystallization experiment in lab, ultimtely I know recrystallization is used for purification purposes,...

We ran a recrystallization experiment in lab, ultimtely I know recrystallization is used for purification purposes, but this question is confusing me. What affect did recrystallization have upon the yield of product, the appearance of the product, and its melting point? yield and MP confuse me. I wasnt given the resources to check the MP during lab so is there a generalized consenssus of wha I know you wont be able to tell me about appearance, I have that potion...

The state of California conducted an experiment with college students. Teachers and students were randomly assigned...

The state of California conducted an experiment with college students. Teachers and students were randomly assigned to be in a regular sized class or a small sized class. The dependent variable is the student’s score on a math test (MATHSCORE). Let SMALL = 1 if the student is in a small class and SMALL = 0 otherwise. The other variable of interest is the number of years of teacher experience, given by TCHEXPER. Let BOY = 1 if the stu-...

Assume that we want to access a web document at a given URL. We do not...

Assume that we want to access a web document at a given URL. We do not know the IP address of the web server. What application layer and transport layer protocols will we use to access the document?

In an experiment, college students were given either fourquarters or a $1 bill and they...

In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below.Purchased GumKept the MoneyStudents Given Four Quarters31311515Students Given a $1 Bill19192828a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters.The probability isnothing.b. Find the probability of randomly selecting a student who...

In an experiment, college students were given either four quarters or a $1 bill and they...

In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 27 13 Students Given a $1 Bill 18 26 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability...

In an experiment, college students were given either four quarters or a $1 bill and they...

In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 30 12 Students Given a $1 Bill 14 26 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability...

In an experiment, college students were given either four quarters or a $1 bill and they...

In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Purchased Gum Kept the Money Students Given Four Quarters 35 17 Students Given a $1 Bill 19 30 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability...

Subjects