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The following is the number of minutes to commute from home to work for a group of automobile executives.
28 25 48 37 41 19 32 26 16 23 23 29 36
31 26 21 32 25 31 43 35 42 38 33 28
a. How many classes would you recommend?
b. What class interval would you suggest?
c. What would you recommend as the lower limit of the first class?
d. Organize the data into a frequency distribution.
e. Comment on the shape of the frequency distribution.
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.
Find out the probability of an event relies on past history of record data. The relative frequency method of computing the probability of an event relies on past history.
Shall we reject the hypothesis that the population mean is 6.0? Interpret the result.
Machine X test unit cost $3000 with beta=3 and theta=500, Machine Y test unit cost $2000 with beta=3 and theta=400. If the machines oil fixtures has life of 20 hrs, which machine goes to market first?
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
Solution utilizing graphical method. Compute the following linear programming problem. Among which of the following points (X, Y) is not a feasible corner point.
What is the probability that the device will detect at least one of the two shoppers entering together?
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
Compare these with the percentages specified by Tchebysheff's Theorem.
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
Calculate the mean number and median number of apples in a bag.
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