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Several types of yogurt are sold in a small general store in New England. From a past study of customer selections, the owner knows that 20% of the customers ordered flavor A, 35%, flavor B, 18%, flavor C, 12%, flavor D, and the remainder, flavor E. Now the owner, who thinks that the customer preferences have changed, randomly samples 80 customers and finds that 12 prefer A, 16 prefer B, 30 prefer C, 7 prefer E, and the remainder prefer D. Determine if the customers' preferences have changed from the last study.
According to USA Today, 65% of Americans are overweight or obese. If five Americans are chosen at random, what is the probability that at least one of them is overweight or obese?
A credit bureau analysis of undergraduate students' credit records found that the average number of credit cards in an undergraduate's wallet was 4.09
Identify the two variables. Then state whether they are categorical or numerical and explain.
Create an object that merges all the files into one object. This is a tip in how to be efficient with your data - instead of having 17 separate objects.
What is the upper bound of the 95% confidence interval for the mean price for all phones of this type?
Sample percentages were presumably at the center of each reported range. Report the sample percentage of birth defects for "normal" parents.
Reproduction of bacteria-infected spider mites. Zoologists in Japan investigated the reproductive traits of spider mites with a bacteria infection.
The plant manager wants to evaluate the capability of a critical cutting operation that he suspects might be the source of the gap problem. The nominal specification for this cutting operation is 25.500 inches.
1. A STAT 200 professor took a sample of 10 midterm exam scores from a class of 30 students. The 10 scores are shown below: 95, 67, 76, 47, 85, 70, 87, 80, 67,
The mean time to expose a single panel in a circuit-board plant is two minutes with a standard deviation of 1.5 minutes. What is the natural coefficient of variation?
explain some of the differences between the method of distribution functions the transformation method for finding the
1. Suppose that you are given the following results. Find the correlation coefficient of the data: sx = 9.697, sy = 16.100, b = 1.310
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