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Mathematics, 22.06.2019 03:50
Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.
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Mathematics, 22.06.2019 08:00
Consider the following equation. -16p + 37 = 49 -21p select the equation that has the same solution as the given equation. a. -55 + 12p = 5p +16 b. -5 + 0.44p = 7- 1.25p c. 2 + 1.25p = -3.75p + 10 d. -14 + 6p = -9 - 6p
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