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In a population of 150 women, the heights of the women are normally distributed with a mean of 64.6 inches and a standard deviation of 3.2 inches. If 36 women are selected at random, find the mean, and standard deviation, of the population of sample means. Suppose that the sampling is done without replacement and use a finite population correction factor.
Define the variable - the weight in pounds - it is a dependent variable. Find the mean, median, mode, variance, and standard deviation for your data.
We want to test the hypothesis that population B has a smaller variance than population A.
In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select one vial from the shipment, what is the probability that it has a hairline crack?
Interpret a scatter diagram - Explain the relationship between the hours each student of a school spends in after school jobs each week and their grade average.
For each year, create a bar chart and a pie chart.
To determine whether there is a difference in the proportion of viewers watching the three channels.
Illustrate what does weighting add to usefulness of moving averages and explain how is it done. The yield on a thirty year treasury note at the end of every year since 1990 is recorded below.
During the 2003 season, MLB took steps to speed up the play of baseball games in order to maintain fan interest; the following results come from a sample of 60 games played during the summer of 2002. And a sample of 50 games played during the summ..
Critically discuss the lower control limit for a proportion defective if the average daily production is 5000 units and the average fraction defective is .02?
Evaluate a simple aggregate price index for 2004. Use 2000 as the base period - Estimating the simple aggregate price index.
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
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