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Find the 95% confidence interval for estimating ?d based on these paired data and assuming normality. (Give your answers correct to one decimal place.)
Before 61 67 57 51 61 48
After 54 41 38 37 41 54
Lower Limit:
Upper Limit:
consider the formula used for any confidence interval and the elements included in that formula. what happens to the
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An analysis of 1,000 cellular phone calls made from company phones at the offices of Kant, Taekitini, Moore, LLC reveals that the length of these calls is normally distributed, with m = 240 seconds and s = 40 seconds.
We know that the population variance is 16. Estimate the mean number of admissions per 24-hour period with a 95% confidence interval.
After performing a two sample t-test, you see a p-value of 0.0355. Of the following, which is the appropriate conclusion?
suppose that we will randomly select a sample of 64 measurements from a population having a mean equal to 20 and a
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Do the data indicate a significant difference? Test with ∝ = .05.
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Assuming the standard deviation stays the same, how much do you have to reduce your average production time so that 95% of the time you can deliver the product in under 75 hours?
In chi-square goodness-of-fit test when there is close agreement between observed frequency and expected frequency, chi-square test value will be small.
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