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The mean height of a group of students in a statistics class is 5 ft 6 in and standard deviation is 2 in. Height is normally distributed.
a. What is the probability that a randomly selected individual is shorter than 5 ft. 6 in?
b. What is the probability that a randomly selected individual is taller than 5 ft 10 in?
c. What is the probability that individual will be between 5 ft 3 and 5 ft 10?
d. What height separates the top 25% of the students from the lower 75% of students?
count the number of sequences of 5 as 6 bs and 7 cs in which the first a occurs somewhere before the first
Construct a 95% confidence interval estimate of the population mean energy usage for this model of refrigerator.
a using exponential distribution estimate the average time using the sample mean.times1118022136011b using the previous
suppose you want to test the claim that mu!=3.5 with standard deviation unknown. Given a sample size of n = 40 and a level of significance of alpha=.05, when should you reject H0.
Write an analysis of his study that addresses the following issues: Is his sample representative of the population of all college textbooks?
I want to establish if a new product is worth marketing. At least 85 percent of the public must express interest in the product and for those that do the average cost they are willing to pay must be at least $47.50.
Fuel efficiency of hatchbacks and large sedans. Let's compare the fuel efficiencies (miles per gallon) of model year 2009 hatchbacks and large sedans.34
you have been recently hired as a marketing analyst in an advertising agency. you are assigned the task of assessing
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Choose one nominal variable from the RSM700 data set and one scale variable from the same data set. Develop a frequency table and an appropriate graph
Use Tinterval on your calculator (press Stat then tests to find the 95% confidence interval. What is the error bound?
What is the probability that a single, randomly selected piece of material will be defective? (Give the answer to two decimal places.)
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