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To compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability?
Test 1 Test 2 Test 350 50 4948 49 4751 51 5146 46 5549 48 55
If there are 12 business-class passengers and 50 tourist-class passengers on a particular flight, what are the expected value of total luggage weight and the standard deviation of the total luggage weight?
Determine Probability using exponential distribution.The average time between failures of a laser machine is exponentially distributed with the mean of 40,000 hours.
The length of a Colorado brook trout is normally distributed. What is the probability that a brook trout's length, (Round your answers to 4 decimal places.)
Using alpha = 0.05 and a computed value of +4.49, can we conclude that the percentage of claims for married policyholders is less then for single policyholders?
Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
Expected value, variance and standard deviation.A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
the population mean of monthly wages of all college graduates under age of 30. Interpret your answer in the context of the problem.
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
Determine the range, variance, and standard deviation for the sample data.
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