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A manager hopes to improve the sales figures for 10 employees by sending them to a motivational seminar. To test the effectiveness of this seminar, the manager compares the sales figures for each salesperson for the month immediately prior to the seminar and the month immediately following it.
Employee before after
Homer 19 12
Bart 6 18
Lisa 9 12
Marge 5 7
Maggie 9 14
Ned 8 17
Milhouse 11 9
Willie 11 17
Stu 11 12
Gill 7 7
Run a statistical hypothesis test and determine if the seminar significantly improved sales figures for the company
The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an average of $250.00 per purchase and perchance at least 2 to 3 items for working out and weight lost
A sample of 46 bars is taken and their mean length is determined to be 51 centimeters with a standard deviation of 3.6 centimeters. Using a .01 significance level, test the retailers claim that the population mean is less than 50 centimeters.
Construct a frequency distribution (class, tally and frequency) for the data set using the indicated number of classes. In the table, include the midpoint, relative frequencies and cumulative frequencies.
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
In a certain college, 20% of the physics majors belong to ethnic minorities. If 10 students are selected at random from the physics majors, what is the probability that exactly 2 belong to an ethnic minority?
Suppose that population has normal distribution. Determine a 95 percent confidence interval for population standard deviation sigma.
The number of hurricanes that are formed during each hurricane season can be modeled using the Poisson probability distribution.
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
The sat scores attainted by the students in nyc are approximately normally distributed with a mean of 500 and a standard deviation of 80. Find the percentage of students who score less than 700.
Is the dependent variable discrete or continuous? interval, or ratio) is used to measure the dependent variable?
Find out the earliest completion time for play and critical path.
Suppose that it is important to demonstrate that the wall thickness exceeds 4.0 mm. Test appropriate hypotheses using these data. Draw conclusions at α= 0.05.
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