Chapter -5 DQ:
Here the confidence level is 92.5% and the alpha value is 0.075
The value of alpha/2 is 0.0375. Next we must determine the area to the left of z alpha/2 is 0.962
To find the value z alpha/2 by using TI-83/84
Open the invNorm function and enter the values of A and the mean and the standard deviation of
standard normal distribution, now we have invNorm(A,0,1) and press ENTER.
Thus the value of z alpha/2 =1.78
Chapter -6 DQ:
(1)
The null hypotheses is H0: P = 0.75
H1: p > 0.75 here the claim is represented by h1
(2)
The value of alpha is 0.06
(3)
The test statistic is z = 1.15
(4)
The critical value is 1.555
(5)
The P value is 0.1251
(6)
In CV method the test statistic does not fall in rejection region z > 1.555 so we fail to reject h0
In P - value method, the P value is greater than alpha so we fail to reject H0
(7)
There is not sufficient evidence to support the claim that more than 75% of MATH 1340 students
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