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In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select one vial from the shipment, what is the probability that it has a hairline crack?
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
Follow the conventions as described in the general guidelines for writing up Special Problems.
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
What happens to the boundaries for the critical regions?
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
Given that alarm has just sounded, find out the probability that real emergency situation exists?
To find out the efficiency of the current ticket operation, Mike wishes to examine several queue operating features.
If new inspector measures 101 stampings with variance of 0.13 square inch, test at 0.05 level of significance whether inspector is making satisfactory measurements. Suppose normality.
The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals. He calculated t = 1.9 from his data.
The systolic blood pressure of a group of 18-year-old women is basically distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg.
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