Educational testing companies provide tutoring in an
effort to help students perform better on the SAT. The company
claim their courses will improve scores by an average of 120
points. A researcher is uncertain of the claim and believes that
120 points many be an over estimation. In an evaluation of one of
the services, the researcher collects scores from 3 students who
took the class and 48 who did not.

Never use plagiarized sources. Get Your Original Essay on
Question: Educational testing companies provide tutoring in an effort to help students perform better on th…
Hire Professionals Just from $11/Page
Order Now Click here

A. Use a= .05 and the following data. What is your
conclusion?

Data

Sample mean- course= 1058 no course= 983

sample Standard devation- course= 90 no course=
105

What will my sample size for n1 and n2 be. What will
the sample mean for both be? What will the variance for both 1 and
2 be?

What is the point estimate? Margin of error? and
C.I?

Open chat
Lets chat on via WhatsApp
Hello, Welcome to our WhatsApp support. Reply to this message to start a chat.