A survey of university students was conducted and found that students spend 2 hours per class...
A survey of university students was conducted and found that students spend 2 hours per class hour studying. A Teacher at your school wants to determine whether the time students spend at your school is significantly different from the two hours. A random sample of 15 Statistics Students is carried out and the findings report an average of 1.75 hours with a standard deviation of 0.24 hours. Test the 5% level of significance.
a. Critical value of t = 1.761. Calculated value of t is -4.03
b. Critical value of t is 2.145. Calculated value of t is -4.03
c. Critical value of t is -4.03. Calculated value of t is 2.145
d. Critical value of t is 1.761. Calculated value of t is -1.041
e. The t-test should not be used, rather use the z-test.
f. None of the above.
Homework Answers
H0: 
= 2
Ha:
2
Test statistics
t = (
-
) / ( S / sqrt(n) )
= ( 1.75 - 2) / (0.24 / sqrt ( 15) )
= -4.03
This is two tailed test,
From T table,
With significance level of 0.05 and df of 14,
t critical value = -2.145 , 2.145
Ans : none of the above.
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