March 6, 2015

Homework Help: statistics

Posted by Lee on Tuesday, April 29, 2014 at 9:21pm.

It is known that the population mean for the Quantitative section of the GRE is 500, with a
standard deviation of 100. In 2006, a sample of 400 students taking the GRE, whose family
income was between $70,000 and $80,000, had a quantitative GRE score of 511. Perform a
one-tailed hypothesis test to determine whether the group, whose family income was between
$70,000 and $80,000, scored significantly higher on average than the population.
8. What is the appropriate hypothesis test?
a. z-test
b. t-test for matched pairs
c. t-test for independent samples
d. chi square test for independence
9. What are the null and alternative hypotheses?
a. H0:μ=μ0; Ha:μ<μ0
b. H0:μ=μ0; Ha:μ>μ0
c. H0:μ=μ0; Ha:μ≠μ0
d. None of these are correct

Answer this Question

First Name:
School Subject:

Related Questions

statistics - It is known that the population mean for the Quantitative section ...
Statistic in Social Science - The verbal part of the Graduate Record Exam (GRE...
Foundations of Measurement - Approximately 400,000 students took the GRE in 2009...
statistics - what are the mean and standard deviation of a sampling distribution...
gre math prob of a sample - sample standard deviation = 3 sample mean = 68 n=30 ...
Psychological Statistics - Assume that GRE scores approximate a normal curve and...
statistic - The Graduate Record Exam (GRE) has a combined verbal and ...
statistics - Assume we draw a simple random sample from a population having a ...
Statistics - In an essay of 250-500 words, thoroughly address the following ...
statistics - A group of 200 students takes the Kaplan course in hopes that it ...