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Two sisters attend different universities. Each is sure that she has to compete with brighter students than her sister. They decide to settle their disagreement by comparing ACT admission scores of freshmen at the two schools. Suppose they bring you the following data and ask for an analysis. The N's represent all freshmen for one year.
The U.
State U.
X‾
23.4
23.5
S^
3
N
8000
The sisters agree to a significance level of .05. Begin by deciding whether to use a one-tailed or a two-tailed test. Calculate a t test and interpret your results. Be sure to carry several decimal places in your work on this problem.
What percentage of the high temperatures are within the interval x‾ - S to x‾ + S? Would you conclude that the two distributions are normally distributed? Why or why not?
a tube of listerine tartar control toothpaste contains 4.2 ounces. as people use the toothpaste the amount remaining in
an automobile manufacturer is concerned about a fault in the braking mechanism of a particular model. the fault can on
You are choosing between the following investment strategies: Invest $200 in stock A. Stock A costs $20 per share. Expected yield per share of stock A is $2, and the variance of yield per share is 9 ($-squared). Which investment strategy has the hi..
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
A mathematics professor has two umbrellas, both of which were originally at home. The professor walks back and forth between his home and office, and if it is raining when he starts a journey, he carries an umbrella with him unless both his umbrel..
discuss what satisfying assumption 1-3 for regression inferences by the variables under consideration would mean. an
Denote by P(M) the probability that Montreal wins the Cup. This is also the conditional probability that they win the Cup, given that the first round was inconclusive. Use this insight to set up and solve an equation for P(M).
Statistics is about more than calculations. It is about turning data into information and using this information to understand the population.
The p-value of the test is closest to:
it is reported that 25 percent of american households use a cell phone exclusively for their telephone services. in a
what is the method to prove a cumulative distribution function of frechet distribution?complete
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