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Earn +20 ptsQ: What is the Z value for 91 percent confidence interval estimation?
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What is the Z value for 95 percent confidence interval estimation?
1.96
What is the z value for 75 percent confidence interval estimation?
1.15
What is the z value for 86 percent confidence interval estimation?
Pr{z<=1.0805}~=0.86
What is the Z value for 90 percent confidence interval estimation?
The answer depends on whether the test is one-tailed or two-tailed.One-tailed: z = 1.28 Two-tailed: z = 1.64
What is the critical value of z for an 88 percent confidence interval?
The two tailed critical value is ±1.55
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