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The following data represents the amount of time ( in minutes ) that a person had to wait for a bus to work on a random sample of 5 working days.
6--8--5--7--5
Assume that waiting times are approximately normally distributed.
Construct a 98% confidence interval for the population mean of waiting times.
One particular morning, the length of time spent in the examination room is recorded for each patient seen by each physician at an orthopedic clinic. Does the data prove a significant diference in mean times, using a=.05 Minutes in Examination roo..
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
Describe how multiple correlation and/or regression analysis is (or could be) applied in your work or life environments. Define the dependent and independent variables.
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
It does not matter, when data are skewed mean and median are the same.
In what sense is this business problem? A societal problem? An individual problem?
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
A business has 5 telephone lines. The first rings every minute on the average, the second every ½ minute, the third every 2 minutes, the fourth every 5 minutes,
Play 100 games of scraps and empirically determine an estimate for the probability of winning.
Determine the coefficient of determination. Assuming a direct relationship between the variables, what is the coefficient of correlation?
The average price of a car wash is $5.00. A sample of six car washes averaged $5.70 and had a sample standard deviation of $1.30. Assuming a normal population, use the critical value method to test the claim at a= 0.05.
Determine the 90% confidence interval for average days worked by employees in all payroll departments?
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