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Companies in the shipping industry vary greatly in terms of the sides of the fleet and annual revenue. The following table shows the data for 6 smaller companies in the industry:
Company A B C D E F
Ships (100s) 11.5 10.0 8.0 5.0 7.2 6.3
Revenue ($millions) 138 135 100 35 40 32
Please answer the following questions:
a. Use the least squares method to develop the estimated regression equation.
b. Panda Inc. has 500 ships in service. Use the estimated regression equation developed in part (a) to predict annual revenue for Panda Inc.
c. At α = 0.05, please use t-test to test for the significance of the slope.
d. Compute the coefficient of correlation.
In January 2001, Microsoft argued in a filing to the U.S. Court of Appeals that the trial court had made a mistake. Would this have been a Type I or a Type II.
The lengths of human pregancies are normally distributed with a mean of 268 days and a standard deviation of 15 days.
Obtain a 95% confidence interval for the mean monthly rent for two-bedroom apartments. Assume that measurements are normally distributed. Round to two decimal places.
we know many types of data fall into a normal distribution with most of the observations falling toward the middle.
Based on this information, what is the probability that a customer will spend more than 9 minutes in the record store?
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
Monash University has put in place a 4 week course of lunchtime exercise breaks for its staff to see if its employees' job satisfaction can be improved.
Do all three prototypes have the same average range? Construct an ANOVA table, and carry out the test. Explain your results.
Suppose you obtain a 100 bag random sample by taking 25 subgroups of 4 bags each, the mean weight of the 25 subgroups was 16.00 ounces with a total of the subgroup ranges of 87.5 oz.
Find a 98% confidence interval for the mean number of days required for successful completion of physical therapy for patients in the average group. Discuss the results.
How many employees are within one standard deviation from the average? How does this compare to what you would expect for a normal distribution?
a local ice cream shop sells 10000 cones of vanilla-flavored ice cream each year. the cones are ordered from an outside
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