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A large investment firm on Wall Street wants to review the distribution of ages of its stockbrokers. The firm believes that this information can be useful in developing plans to recruit new brokers. The ages of a sample of 40 brokers are shown here.
46 28 51 34 29 40 38 33 41 52
53 40 50 33 36 41 25 38 37 41
36 50 46 33 61 48 32 28 30 49
41 37 26 39 35 39 46 26 31 35
a. Make a stem-and-leaf display.
b. Make a histogram.
c. Make an ogive.
d. what have you learned?
A chi-square test of the statistical significance of the relationship has a p-value of .19. Is this evidence that there is a relationship? What is the justification for this conclusion?
Explain depreciation expense, amortization expense, accumulated depreciation, and accumulated amortization?
The benefits office wants to investigate whether a relationship exists between the level of an employee and their interest in a 401k plan. Using the above data, conduct a chi-square analysis and respond to the following question
The marketing department likes to know patterns about the consumers who call the 1-800 phone bank with questions/problems.
How many cars were measured?- Why might the mean be so much larger than the median?- Describe the center and spread of this distribution with appropriate statistics.
question in this problem we will perform regression analysis on the sepal and petal measurements of the first 50
Suppose an economist knows the following statistics about a particular economy:
You must use the best approximate values in the normal distribution tables. Do not average table values.
After looking it over, you realize that you would rather spend your weekend here. Your reservation at the coast can be canceled easily at no charge. Staying at the new resort, however, would cost $50 more. Would you stay at the new resort or conti..
In a computer store, 30% (.3) of the computers in stock are laptops and 70% (.7) are desktops. Five percent (.05) of the laptops are on sale, while 10% (.1).
If the company marks up total cost by 0.40, what price should be charged if 68,000 units are expected to be sold?
Diagram the exercise and eating experiment. Twenty-four public middle schools agree to participate in the experiment described in Exercise 2.28.
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