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a.) The grades of class are A 10%, B 20%, C 40%, D 20% and F 10%. A.) if we assume that the grades are normally distributed, how many standard deviations on either side of the mean will consist C grades?
b.) Suppose that distribution of grades has average of 78 with standard deviation of 11. Find the appropriate cutoff points for the grades A and F.
A yearbook page is to be designed so that there are 24 square inches available for print or pictures with margins of 1.5 inches on the top and bottom
A data set of ordered pairs with a negative linear correlation has a coefficient of determination of 85.2%. What is the linear correlation coefficient?
You want to estimate today's mean temperature, so you make a series of measurements (taken as a sample) throughout the day. The mean of these measurements is 63 degrees Fahrenheit, and their standard deviation is 3.4 degrees Fahrenheit.
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
Calculate a 95 percent confidence interval for the population mean audit delay for all public owner-controlled companies in New Zealand.
Why is statistical significance not necessarily of practical important difference to a business decision? Give an example and explain.
Using the above database, compute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
Probability based on a random experiment - What is the probability, without looking in the drawer
A survey for Hotels asked respondents "When traveling internationally, do you generally venture out on your own to experience culture, or stick with your tour group and itineraries?" The survey found that 23% of the respondents stick with their t..
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4.
Give an example using either completing the square or the quadratic formula and explain each step as if you were teaching someone who had never used the method before.
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