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Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The X column indicates the number of client contacts last month, and the Y column shows the value of sales ($ thousands) last month for each client samples
a. Determine the regression equation.
b. Determine the estimated sales if 40 contacts are made.
At 5 % level of significance, does this sample prove violation of the guideline that average patient muts pay no more than $250 out-of-pocket? Is this a close decision?
Does this result support original claim, or is population percentage considerably less than 45%. Use alpha=.05 for level of significance.
You wish to do a community needs assessment survey of a community to find out how much office space is needed by professionals in the community.
Determine the class with the greatest number of data values.
The effectiveness of treating respiratory infections with herbal remedies was studied. "Days of fever" was used to measure effects. Among 356 children treated with herbal remedies, teh mean number of days with was 0.36,
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:
Is it reasonable to compute that the mean of the population is actually $15,000.
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
If a 99% confidence interval is calculated to estimate the difference between the average hourly rates for each type of graduate, what is the margin of error? Assume both population standard deviations are equal.
Describe to a person who has never taken a course in statistics the meaning of a grouped frequency table.
If garage is robbed, determine the probability doors were left open?
Construct and interpret 90 percent on confidence interval for the mean. Be sure to interpret the meaning of this interval.
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