00:01
Hello students, in this question first of all we have to find out the critical value.
00:04
So here it is a two -tailed test.
00:06
Two -tailed test.
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Two -tailed test.
00:10
Two -tailed test.
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And it is a z -test.
00:15
And also the alpha value is 0 .02.
00:18
Therefore, we get the critical value.
00:21
Critical value is equal to plus or minus 2 .3263.
00:27
And after that, we have to find out the z -test value.
00:35
So here the z -test, z -score is mu equal to 18.
00:41
And the population variance sigma square is 691 .69.
00:46
And mean mu equal to 75 .3.
00:50
And sample size n equal to 106.
00:52
Therefore, here z equal to m minus mu...