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The aircraft seam needs 28 rivets. Seam will have to be reworked if any of these rivets is defective. Assume rivets are defective independently of one another, each with the same probability.
If 24% of all seams need reworking, determine the probability that rivet is defective?
How small must probability of the defective rivet be to make sure that only 5% of all seams need reworking?
Should you use a two tailed test versus the one tailed test? If the hypothesis is non-directional and you predict a difference between the means but do not specify which mean will be higher a two tailed test should be used.
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
A restaurant claims that its speed of service time is less than 18 minutes. A random selection of 36 service times was collected, and their mean was calculated to be 17.1 minutes.
Find the value of q-hat from proportion and degrees of freedom used to find the t-score.
How variable is the number of service calls with which Sam's department must deal?
The remaining 5 were not given the overview. Here are the scores for students in each group:
Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chick..
What percentage of observations of a normal distribution are represented by the mean plus or minus 1.96 standard deviations?
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
Determine a 95% confidence interval for the true mean weight of such boxes?
Using your own experience, estimate the probability the local weather forecast is correct. Explain the rationale behind your estimate.
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