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A candy company claims that 19% of its plain candies are orange, and a sample of 100 such candies is randomly selected.
Find the mean and standard deviation for the number of orange candies in such groups of 100.
perform linear regression analysis to obtain an equation to predict age at death given a specific cholesterol level.
a researcher conducted an experiment on the effects of a new multivitamin on energy level with a control group received
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Explain.
The numbers of years served by selected past members of the U.S. Supreme Court is listed below. Find the percentile rank for each value. Which value corresponds to the 40th percentile? Construct a boxplot for the data and comment on their shape.
How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 seconds?
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
The Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed.
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
Does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in British versus American trade magazines? Please show work.
The standard deviation of the population weight losses is about 10 pounds. How large a sample should he take to estimate the mean weight loss to within 2 pounds, with 95% confidence?
A box of 200 bolts of it known that 2% of such bolts are expected to be defective.(you may take the distribution to be poission; e-4=0.0183).
Give the estimate of mean and variance of population distribution of weekly wintertime Breckenridge snowfall using sample.
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