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A random sample of 55 standard hotel rooms in the Philadelphia, PA area has a mean nightly cost of $154.17 and a standard deviation of $38.60. Construct a 99% confidence interval for the population mean cost.
Can you give a general rule as to what happens with confidence intervals as a function of sample sizes and confidence levels? What are the trade-offs?
the no. of grams of carbohydrates contained in 1-ounce servings of randomly selected chocolate and non chocolate candy
Given that the sample mean is x¯=93.81, and the sample standard deviation is s=4.65, determine if there are any outliers. (We will define an outlier to be any data value outside of the x¯+_2s range.)
Sampling Distribution for mean
The mean sat verbal score is 401, with a standard deviation of 97. Use the empirical rule to determine what percent of the scores lie between 207 and 498.
question 1 suppose you own a campsite in chamarel and you wish to increase the site in order to increase your profits.
The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.
question as a region sales manager you are interested in testing if there is a difference in sales close rates between
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Determine a point estimate of population mean. Determine the 99% confidence interval of true mean weight of the minivans.
From the test data, can we determine whether the oven has an effect on the cake's density? The null hypothesis should be: Oven has no effect on density.
Consider the following results for two samples randomly taken from two populations. Construct a 99 percent confidence interval estimate of the difference between the two sample means.
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