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Inverse probability based on normal distribution.
The mean price of new homes from a sample of houses is $155,000 with a standard deviation of $15,000. The data set has a bell-shaped distribution. Between what two prices do 68% of the houses lie?
What percentage of population scored between the mean and Jorge?
The manager is concerned that sales are slipping, after taking into account the average value of sales for four consecutive Saturdays being $4800.
Define the rejection region. State the statistical decision.
Would you use a one-tailed or two-tailed test? Explain your response.
The 99% confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is:
What is sampling with replacement, and why it is used?
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
What is the probability all three of the selected homes have a security system?
Determine the mean number of times the machine was used per day.
What does the standard deviation mean? Interpret the standard deviation relative to the average or mean?
Carry out test of independence to find out whether employee health insurance coverage is independent of size of company. Use α = 0.05 level of significance.
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