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Let p1 = 100 and n1 = 500; and p2 = 200 with n2 = 500. Test whether there is a statistical difference between the two proportions at the 5% significance level.
1. The difference is not statistically different.
2. The difference is statistically different.
In the Distance problems, the kids are given a Rate (speed) that a vehicle is going, as well as a Time that the vehicle travels, and asked to calculate the Distance travelled. In the Rate problems they are asked to compute Rate from the other two ..
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
Assume a population standard deviation of 450-kilowatt hours. Determine the standard error of the mean.
The mean of a normal probability distribution is 60; the standard deviation is 5.
A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
They find that these 100 people lost an average of 38 hours with a standard deviation of 9.5 hours. What is the P-value for this significance test?
Calculate the population mean and population standard deviation.
Also use the regression model to predict a student's average if he/she misses 4 classes.
Illustrate what is the probability all four calls are infact emergencies. Illustrate what is the probability that three or more calls are not emergencies.
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
Two letters are chosen at random without replacement from word statistical. Determine the probability that both letters are s?
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