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Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with a mean of 12.8 ounces and a standard deviation of 0.6 ounces. If the manufacturer wants to keep the mean at 12.8 ounces but adjust the standard deviation so that only 2% of the bags weigh less than 12 ounces, how small must that standard deviation be?
For each of the following populations, would a score of X = 50 be considered a central score (near the middle of the distribution) or an extreme score (far out in the tail of the distribution)?
Years to Complete a Graduate Program: The average number of years a person takes to complete a graduate degree program is 3. The standard deviation is 4 months. Assume the variable is normally distributed. If an individual enrolls in the program, ..
A bowl contains 20 chips, of which 9 are red, 8 are white and 3 are blue. Six chips are taken at random and without replacement. Find the probability that each of the 6 chips is red.
The following data represent the number of weed-eaters sold per month at a local garden shop and their prices
Assume that company A makes 80% of all electrocardiograph machines, company B make 15% of them, and the company C makes the other 5%.
Explain finding value of test statistic for the given data also interpret the result. Can Mr. Ratter compute which the mean weight of the bags is less than 50 pounds.
The McNemar test is a test on a 2x2 classification table when you want to test the difference between paired proportions. Chi-square test for 2X2 tables compares the tallies or counts of categorical responses between two (or more) independent grou..
Design a contingency table that will hold your data. What are your degrees of freedom and critical value at a 0.05 confidence level? You do not need data to answer this.
The mean time for the completion of a shopping center is estimated to be 14 months with standard deviation = 4 months. What is the probability that the renters will not be able to move in 19 months?
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
A new county hospital is attempting to determine whether it needs to add a particular specialist to its staff. Five percent of the general hospital population in the county contracts the illness the specialist would treat.
Compute the following .r = correlation between x and y = - 0.7 = mean of the values of x = 50.25 = mean of the values of y = 31.77 = standard deviation of the values of x = 15.85 = standard deviation of the values of y = 1.76 The slope of the leas..
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