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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.
What is the correlation, and why is it so high? Since all of the guessed weights were higher than the actual weights, does that influence the correlation at all?
Steve Goodman, production foreman for the Florida Gold Fruit Company, estimates that the average sale of oranges is 4,700 and the standard deviation is 500 oranges. Sales follow a normal distribution.
The following data values are a simple random sample from a population that's normally distributed with (symbol for variance) o2=4.0:
You are conducting an evaluation of services at a social service agency. One of the evaluation issues is finding out whether male clients rate the quality of casework services as highly as do female clients.
What is the probability that the first order will come on the fourth sales call of the day? Please show work and round to 4 decimal places.
Identify the null and alternative hypothesis, test statistics, p-value(or range of P-value), critical value(s), and state the final conclusion that address the original claim.
Assume that each shipment contains a random sample of bearings. a. What is the probability that a given shipment is acceptable?
56% are enrolled in school. If a sample of 500 such children is randomly selected, find the probability that at least 250 will be enrolled in school.
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
What is the rejection point at α = .10 and indicate if you would accept or reject H o ?
Use formula z=(mean of values in sample - mu subscript mean of values in sample) divided by (lower case sigma divided by sqrt number of values in sample)
Compute the minimum sample size required assuming that no prior information is avaiable?
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