Question

A Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures the motivational attitude toward school, and study habits of students. Scores range from 0 to 200. The mean for Canadian college students is about 115, and the standard deviation is about 30. A teacher who suspects this population average to be incorrect gives the SSHA to 25 students who are at least 30 years of age. The sample average score is 127.8. Calculate the p-value.

Select one:

a. 0.03

b. 0.3

c. 0.003

d. 0.5

Answer 1

Answer----->>

Here while calculating p-value for z-score probability we refer standard normal distribution table.

"enlivo Solution given that A survey of study Habits and Atitudes (SSHAD is a psychological test that measures the motivational attitude to world school and study habiles of Students score range 0 to 2001 The mean mean for canadian College Student is about 115 and population standard deviation is '30 je 6=30 dami # teacher who claims that this popullon mean is incorrect Also, Samplesize=n=25. Sample mean= 127.8. Nulland atematine hypothesis is Hoi UE 115 Ha: 4 & 115 le 4 = 115 Test statistica under Ho (4=115) 127.8-15 xell 3/n - 2.13 30/125 D-vwue! P(1K) > 2113) = 1- (1z1 < 2013) =) - P(-2.13 <<< 2013) 21 - [P(Z <2:23) - P(Z<2:13)] - 2-2.PCZK2013) 2-12) (0.9834). 10 0.0332 1 p-value = 0.0332 : correct option is a) 0.03