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What is the probability that for any day, the number of special orders sent out will be more than 4? What is the standard deviation of the number of special orders sent out daily?
The pulse rates for 13 adult women were as follows. Construct a 0.98 confidence interval for the mean pulse rate. (Give your answers correct to one decimal place)
Researchers gathered data on cholesterol levels and performance on a stress test on a treadmill from a sample of patients. The mean cholesterol score was 112 and the mean stress test score was 89.
A normal population has a mean of 73 and a standard deviation of 6. You select a sample of 40. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 d
A politician claims that she will receive 64% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 50 of those sampled will vote for her. I
Consider a known confidence interval with a standard deviation of S = 7 and a sample size of n = 12. If the standard deviation was changed to S = 4 what will happen to the width of the interval?
A recent test had 25 multiple choice questions ( each having 3 choices) and 15 True/False questions. Determine the probability that one randomly selected test would have no more than 10 multiple cho
With 95% confidence, what is the smallest error of estimate one can achieve within this budget? If a sample of the size computed above is drawn from the lot and the sample proportion was phat = 0.06,
A departmental group of twelve individuals includes five engineers and seven technicians. Two individuals are to be selected at random from among the 12: What is the probability that the selection
Use normal approximation to find the probability that more than 47% of the sampled printers operate at the advertised speed, i.e. the printing speed is equal to or greater than 23 ppm.
Give an explanation for your boundary conditions and explain what other conditions we need to distinguish which solution to these equations gives us the fj? Solve these equations and give the criter
The third door leads to a tunnel that will return him to the mine after 7 hours. If we assume that the miner is at all times equally likely to choose any one of the doors, what is the moment generat
The employee credit union at State University is planning the allocation of funds for the coming year. The credit union makes four types of loans to its members. In addition, the credit union invest
Formulate the linear programming problem that determines the optimal production quantities in order to maximize the profit. Use Excel Solver to solve this problem. What is the optimal quantities of ea
The student takes a random sample of beads and finds that 16 out of the 44 beads sampled are purple. What is the p-value associated with the hypothesis test from Question 1?
We find a test statistic of Z=-2.57 What is the corresponding p-value? Give your answer as a proportion between 0 and 1 to 4 decimal places.
The researcher plans to take a random sample of 100 students from charter schools. He will then carry out a test of hypothesis using a significance level of 0.01. Which of the following will increas
Test whether the true mean yield strength is 50 kpsi. Use α = 0.05 and assume a normal distribution. Clearly state your conclusion in the context of the problem.
What are the average and standard deviation of the mass of your sample of squirrels from the arboretum? Maintaining the probability of making a Type I error at 5%, is the mass of adult grey squirrels
What is the probability that exactly ten customers will ask for hot pepper? What is the probability that 1 or more customers will want hot pepper?
The reference desk of a university library receives request for assistance. Assume that a Poisson probability distribution with an arrival rate of 10 request per hour can be used to describe the arr
(a) Find the 95% confidence interval for the true mean decrease in the drying time based on this sample. (Give your answers correct to two decimal places.) to (b) Do you think these percentages aver
Explain and interpret your conclusion in part e. What does this mean? Determine the observed p-value for the hypothesis test and interpret this value. What does this mean?
1. The speed of automobiles on a section of I-95 is normally distributed with a population mean of 65 miles per hour and a population standard deviation of 8 miles per hour. A random sample of 30 ca
The number of automobiles passing through a particular intersection per hour is estimated to be 20. Find the probability that fewer than 5 vehicles pass through during any 1-hour interval. Assume th