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Create a new variable: Profits per employee. Create a frequency distribution and histogram for this variable, and calculate the mean, median, and standard deviation. Describe how BankTen compares with other banks in terms of profits per employee.
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer and Catanese (2003) examined the importance of food as a source of pleasure versus concerns ab..
Several factors influence the value obtained for a t statistic. Some factors affect the numerator of the t statistic and others influence the size of estimated standard error in the denominator.
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
The difference between a random variable and a probability distribution is: A. A random variable does not include the probability of an event. B. A random variable can only assume whole numbers
Score for the states eith graders on the examination is more than 260. At alpha equals 0.04 is there enough evidence to support the clim?
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
In a survey of women in a certain country (ages 20-29) the mean height was 64.5 inches with a standard deviation of 2.75 inches. What height represents the 90th percentile? What height represents the first quartile?
Describe a hypothesis upon which the manufacturer might wish to conduct a test concerning the relative effectiveness of the new fertilizer.
The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?
A microeconomist wants to determine how corporate sales are influenced by capital and wage spending by companies. She proceeds to randomly select 26 large corporations and record information in millions of dollars.
Let X be the number of calls you need to make until you find your friend. Give the probability mass function for X. How many calls do you expect to make until you find your friend?
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