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If you record data for a year, and find that the mean number of women in shelters is 250, with a standard deviation of 75, and the distribution is normal, answer this. If the city's shelters have a capacity of 350, will that be enough places for the women on 95% of all nights? If not, what number of shelter openings will be needed? Then if the capacity is only 220 openings because some shelters have closed, what is the percentage of nights that the number of women seeking shelter will exceed the current capacity?
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference among the means?
The table below lists the number of audience impressions (in hundreds of millions) listening to songs and the corresponding numbers of albums sold (in hundreds of thousands).
The mean age of school bus drivers in Denver is claimed to be 56.9 years. A hypothesis test is performed at a level of significance of 0.05 with a P-value of 0.03. Choose the best interpretation of the hypothesis test.
But did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct.
At the .05 significance level, test the claim that the proportion of all children in the town who suffer from asthma is 11%.
Estimate the population in 1600 and graph the population trend from 1600 through to 2000
Critically discuss the relationship between a sample and the type of population it is taken from? What population factors should be taken into consideration?
The researcher found that Lincoln's educational score did not correlate with the expected variables.
Based on this sample information find out what percent of variation in starting salaries is described by GPA, and find out the equation that would forecast salary from GPA. Give a scatter plot.
(a) Find the range. (b) Find the variance. (Give your answer correct to two decimal places.) (c) Find the standard deviation. (Give your answer correct to two decimal places.)
A company operates four machines during three shifts each day. From production records, the data in the table below were collected.
A random sample of 25 days' receipts is chosen for an audit. What is the probability that the sample mean is larger than $2,220?
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