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A machine produces pipes used in airplanes. The average length of the pipe is 16 inches. The acceptable variance for the length is .3 inches. A sample of 25 pipes was taken. The average length in the sample was 15.95 inches with a variance of .4 inches.
a. Construct a 95% confidence interval for the population variance.
b. Construct a 95% confidence interval for the population standard deviation.
c. Test at the 5% level of significance that whether the variance of length of pipes is significantly different from the standards.
Please make sure these are included as part of the problemA. State the null and alternative hypotheses to be tested.B.. Compute the test statistic.C.. State the decision ruleD.. Draw conclusions.
For each data set, compute and save g(m hat). Then do the following: Plot the histogram of B values of g(m hat)and sqrt(n)*[g(m hat)- g(m )].
You wish to find out if negative relationship exists between amount of bottled water someone drinks and their water bill. Create a prediction model, if suitable.
The letters of the word PRESERVE are arranged at random. Then what is the probability that all the 3 E's occur together??
Biologist estimates that 50% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Calculate the standard deviation for this data = since it is a case of grouped data with classes. use group or class midpoints in the formula in place of x values.
Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course:
The statistical analysis predicted that there would be 104 foxes. Calculate the residual for that data point.
The number of girls who attend a summer basketball camp has been recorded for the seven years the camp has been offered.
A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 175 and a standard deviation of 15. If an applicant is randomly selected, find the probability of a rating that is between 150 and 200.
A random sample of 70 printers discovered that a20 of them were being used in small businesses. Find the 99% limit for the population porportion of printers that are used in small businesses.
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
Take your data and arrange it in the order you collected it. Count the total number of observations you have, and label this number N. Then create another set of data starting from one and increasing by one until you reach N.
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