2 Statstics Questions due by 9-15-2015

Sep 14th, 2015
DreamIt
Category:
Accounting
Price: $20 USD

Question description

Question 1: A math teacher believes that she has developed a review course that increases the scores on the math portion of the SAT exam. Based on reliable data, scores are normally distributed with u = 523 and standard deviation = 113. The teacher obtains a random sample of 1800 students, puts them through the review class, and finds that the mean SAT math score of the 1800 students is 527.

a)State the null and alternative hypothesis.

b) Test the hypothesis at the a= 0.10 level significance.


Questions 2: Researchers want to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 11 adolescents with alcohol use disorders. They wanted to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02cm 3 (this should be 9.03 cm to the third power). An analysis of the sample data revealed that the hippocampal volume is approximately normal with X- (this should be x with a line over it) = 8.49 and s = 0.8. Conduct an appropriate test at the a= 0.01 level of significance.


Tutor Answer

(Top Tutor) Daniel C.
(997)
School: Boston College
PREMIUM TUTOR

Studypool has helped 1,244,100 students

Summary
Quality
Communication
On Time
Value
ashleyisgod
Feb 16th, 2017
" Top quality work from this guy! I'll be back! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1823 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors