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Compare the Watergate scandal to other presidential scandals. was it the worst? Why or why not? Did it cause lasting damage to the American political system? Did any good come from it?
according to chebychevs theorem what percentage of a distribution will be within k 3.2 standard deviations of the
For the midcourse PSYC105 test M = 39 (out of 60) and SD = 11.2. What is the deviation score for a person scoring 33 in the test? Complete the formula and show your working and answer.
The data show that 48 of the doctors picked brand x. If these data were evaluated using a chi-square test for goodness of fit, what is the expected frequency for brand x?
An independent second stage is normally distributed with a mean of 43 minutes and variance of 10 minutes. What is the probability that the two stages take over 80 minutes?
1. when an engineer wants to send a binary signal a 0 or 1 signal through a communication channel assume that there is
a grocery store is sponsoring a sales promotion where the cashiers give away one of the letters a e l s u v for each
A discrete random variable Y takes the value -1, 0 and 1 with probabilities 1/2θ, 1- θ and 1/2θ respectively. Let Y1 and Y2 be two independent random variables, each with the same distribution as Y.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be?
suppose we draw 13 cards out of a deck of 52. what is the expected value of the number of aces we
The safety coordinator of a manufacturing facility wishes to demonstrate that the mean time (in days) between safety incidents has deteriorated from the traditional 30 days. What are the appropriate null and alternative hypotheses?
Do the data indicate a significant difference between the frequency distributions for male and females? Test at the .05 level of significance and describe the difference.
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