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Find the critical value zc necessary to form a confidence interval at the level of confidence shown below. c=0.80
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Find the critical value zc necessary to form a confidence interval at the level of confidence shown below. c=0.80
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Mathematics
3 years
2021-08-19T18:34:07+00:00
2021-08-19T18:34:07+00:00 1 Answers
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Answer:
1.28
Step-by-step explanation:
Given a confidence (c) = 0.80
α = 1 – c = 1 – 0.8 = 0.2
α/2 = 0.2/2 = 0.1
From the normal distribution table, The critical value necessary to form a confidence interval is gotten by getting the z value of α/2, which is the same as that of 0.4 (0.5 – 0.1). The z value of α/2 is: