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An average computer mouse inspector can inspect 40 mice per hour with a population standard deviation of 8 mice per hour. The 50 computer mice inspectors at a particular factory can only inspect 34
Suppose those players were a random sample of the NBA and assume the heights of NBA players follow Normal distribution. Find a 95% confidence interval for the mean height of NBA players?
What would be your recommendation to the local Farm Bureau for estimating the average loss of production per acre, given the data you have at hand?
A high of 10 was possible. A sample of five tests was selected from each group. The test grade results were: At the 0.01 level, what is the critical value?
The average GPA has been 3.0. Is this year's class significantly different from the long-run average? At what alpha level would it be significant?
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlat
In a batch of 8,000 clock radios 6o/o are defective. A sample of 5 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one
Calculate a confidence interval for the population mean difference between indoor and outdoor concentrations using a confidence level of 95%, and interpret the resulting interval.
Research shows that the life time of Everlast automobile tires is normally distributed with a mean value of 70,000 miles and a standard deviation of 7,000 miles. What is the probability of having a
The grades of 20 students are listed in the stem and leaf diagram below. What is the probability of randomly selected student to have a grade more than or equal to 60 and less than or equal to 80.
Using suitable probability model, calculate the probability of producing more than 3 faulty chips per hour. Explain the reasons for choosing your probability model.
Egyptians watch an average of 2.5 hours of television per person per day. If the standard deviation for the number of hours of television watched per day is 1.6 and a random sample of 225 Egyptians
Find the joint density f(u,v) for (U,V) (Hint: take into account the region where it is non-zero). Calculate f(1,0) and input it as the answer.
A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage
A local businessperson is going to donate $1000 to the favorite charity of a randomly selected graduate. What is the probability that the graduate selected will be a male who is not a me
What are the sample variances for the yields in the two groves? Test the equality of these two variances using significance level of 5%.
Compute a 90% confidence interval or the population mean, based on the sample 67, 76, 52, 70, 69, 59, 75, 72, 53, and 257. Change the last number from 257 to 61 and recalculate the confidence interv
A bowl contains 40 chips. there are 9 red, 15 white, 5 yellow, 8 blue and 3 green chips. What is the probability of picking at least one white chip on 3 picks done with replacement?
Determine the appropriate null and alternative hypotheses to assess weather students whose first language is not english score differently on the math portion of the sat exam.
An airline estimates that 92% of people booked on their flights actually show up. If the airline books 79 people on a flight for which the maximum number is 77, what is the probability that the numb
Recycling is supposed to save resources. Some people think recycled products are lower in quality than other products. What is the conditional distribution of opinion about quality of recycled coffee
A Texas clock company owns two factories, one in Dallas and one in Fort Worth. The Fort Worth factory makes 70% of their clocks, and 5% of their clocks are defective. However, 2% of the Dallas clock
An auditor wants to estimate what proportion of a bank's commercial loan files are incomplete. The auditor randomly samples 100 files and finds 9 are incomplete. Using a 95% confidence interval, es
Two players, A and B, take turns on a gambling machine until one of them scores a success, the first to do so being the winner. Their probabilities for success on a single play are p for A and q for