SOLUTION: I have zero idea what this question is even asking me and really need some help.Thank you Three experiments investigating the relation between need for cognitive closure an

Question 752964: I have zero idea what this question is even asking me and really need some help.Thank you

Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an introductory psychology course. The "need for closure scale" has scores ranging from 101 to 201. For the 73 students in the highest quartile of the distribution, the mean score was x = 178.70. Assume a population standard deviation of σ = 7.81. These students were all classified as high on their need for closure. Assume that the 73 students represent a random sample of all students who are classified as high on their need for closure. How large a sample is needed if we wish to be 95% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an introductory psychology course. The "need for closure scale" has scores ranging from 101 to 201. For the 73 students in the highest quartile of the distribution, the mean score was x = 178.70. Assume a population standard deviation of σ = 7.81. These students were all classified as high on their need for closure. Assume that the 73 students represent a random sample of all students who are classified as high on their need for closure. How large a sample is needed if we wish to be 95% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure?
------
n = [z*s/E]^2
----
n = [1.96*7.81/2]^2 = 59 when rounded up
================
Cheers,
Stan H.
==================
RELATED QUESTIONS
I have zero idea what this is asking me and have read the chapter three times and need... (answered by tommyt3rd)

I have zero idea what this question is asking me and could really use some help. Please... (answered by stanbon)

simplify. assume that no denominator is zero and that 0^0 is not considered {{{... (answered by mananth)

which is a zero of the following function? f(x)=x^2-x-12 a.1 b.2 c.3 d.4 I... (answered by solver91311)

How many different three-digit numbers can be formed from the digits 0 through 9 if the... (answered by solver91311)

This Question is from Applied Statistics and is Question 13.30 I have read page 591 nad... (answered by stanbon)

Hello, I go to the Moring Star Online Homeschooling Academy. And need sever... (answered by scott8148)

The question is asking "What is the largest three digit number that is divisible by both... (answered by darq)

This question is really hard and I need some help! Thank you! Evaluate 1/2^-22^-3-4^5 (answered by arallie)