Use SAS for problems 7 and 8 During your first lab, be sure to learn from Lab1-r

Question

Use SAS for problems 7 and 8 During your first lab, be sure to learn from Lab1-review sas how to (1) read the smoke data under Example 2.(2) carry out procedures needed and (3) identify information you need from SAS output to answer the questions. If a 99% confidence interval for mu mu zls (2.5, 3.5). which of the following confusions(s) can be drawn based on this interval? Reject H_o mu_1 = mu_2 alpha = .01 if the alternative is h_ac mu_1 = mu_2 Reject Het mu_1 = mu_2 at alpha = 0.01 if the alternatives is Hs mu_1

Explanation / Answer

a) P(Z<=2.5) = .9938
b) P(|Z|>z) = .242
Which means are out of -z and z is .242, or .242/2 = .121 in each of the tails.
Hence, find the Z for .121. that is Z = 1.17

c)P(Z<=z) = .5
This means that we find the z which covers half of the area under normal dist.
Since the central point or the mean of the normal dist. is at z=0, therefore,

P(Z<=z) = .5 at z=0

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