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There are 1200 police officers in Boston: 960 men (M), 240 women (F). Last year, 324 officers were promoted (P): 288 men and 36 women.
Compute the conditional probability of promotion if the officer is a woman, P(P|F).
If promotion and gender were to be independent, how many women should have been promoted for independency (given that 324 officers were promoted)?
If 7 adult smartphone users are randomly? selected, find the probability that at least 5 of them use their smartphones in meetings or classes.
Calculate the p-value. Round your answer to four decimal places. p=
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
The time in months between occurrences of safety violations in a toll manufacturing facility is shown in the table below.
Estimate the mean difference in heart rate for newborns between the two ethnic groups using a 95% confidence interval.
Do you think that some respondents might not give truthful answers to a question about their income? Discuss the possible effects on your estimate and confidence interval.
This airplane will be obsolete in 1 year, so all production of the spare part is to take place at present. The production costs now are $1,000 per item-that is, c 1,000-but they become $10,000 per item if they must be supplied at later dates-that ..
Find the 95% confidence interval of the mean number of ER patients treated each day in the hospital if the standard deviation is 8 instead of 4.
The Computer Systems Department has eight faculty, six of whom are tenured. Dr. Vonder, the chair, wants to establish a committee of three department faculty members to review the curriculum. If she selects the committee at random:
Consider the study we used as an example for a twoway between-groups ANOVA. Older and younger people were randomly assigned to hear either one repetition.
To evaluate the program, he selected a random sample of eight participants and found the number of days each was absent in the six.
A medical association randomly selected 10 plastic surgeons and 10 trauma surgeons and asked them how flexible their schedule is on a 1 (not at all flexible)
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