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A Quality check process of a certain brand of sports car includes ultrasonic paint thickness check. In order to pass the check, paint thickness should be in between 4 and 5 mils. Assume that cars are independent regarding to their paint quality. Each car has a 90% chance of passing the test. What is the probability that 3 of the next 6 cars will fail the test?
if two televisions are randomly selected, compute the probability that both televisions work. what is the probability that at least one does not work?
In this problem set you will get some practice performing hypothesis tests for two samples. If you use Statdisk to perform any portion of these analyses, please include the results, label them, and refer to them accordingly in your interpretations..
The waiting times have a standard deviation of 4.9 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
IQ scores but have been standardized so that complete sample has mean of M = 10 and standard deviation of s = 2. Compute mean and the standard deviation for the sample of n = 8 females and for sample of n = 8 males.
If we select, at random, a small business owned by a non-Hispanic white, what is the probability that it is a male-owned firm?
a bank has the following data on the gender and marital status of 200 customers: single 20 male 30 female, married male 100 female 50,
Can you please explain a general strategy for factoring in a very organized way. Give an example if possible.
A manufacturer of automobile transmissions uses three different processes. The management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown below.
Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a:
What assumptions must you make in order to use these statistics for inference? Explain in context what this confidence interval means.
A psychologist wants to determine if there is a linear relationship between the number of hours a person goes without sleep and the number of mistakes he/she makes on a simple test. The following data is recorded. Determine the regression line equ..
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