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SAT scores. SAT scores (out of 2400) are distributed normally with a mean of 1500 and a standard deviation of 300. Suppose a school council awards a certificate of excellence to all students who score at least 1900 on the SAT, and suppose we pick one of the recognized students at random. What is the probability this student's score will be at least 2100? (The material covered in Section 2.2 would be useful for this question.)
suppose we toss a fair die twice. let e denote the event that the sum of the two tosses is 7 and f denote the event
Fathers revisited. Consider again the results of the poll about fathering discussed in Exercise. If we select two people at random from this sample.
a manufacturer of computer hard drives claims a failure rate of 5 or less during the first three years of operation.
What is the median lifetime of these phones (in years)? In addition to selecting one of the multiple choice answers, describe what you did step-by-step to arrive at a solution.
For each of the following binomial random variables, specify n and p: A fair die is rolled 30 times. X = number of times a 6 is rolled.
Then repeat the process of generating 1000 confidence intervals. Report the percent hit. How does this compare with the percent hit that you found in the previous exercise?
What is the conditional probability that a student likes gospel music if we know that he or she likes country music and what is the conditional probability that a student who does not like country music likes gospel music?
Workers at a large toxic clean up project are concerned that their white blood cell counts may have been reduced. Let x be a random variable that represents white blood cell count per cubic millimeter of whole blood in a healthy adult.
The purpose of two-way ANOVA is to learn about (a) the means of two populations.
There are many reasons why sales are not completed; sometimes it is due to variables beyond the control of the salesperson, but often it's due to a failure to gain commitment. Why--after investing all the time and effort in prospecting, qualifying..
A new surgical procedure has been developed to remove cataracts; it involves a smaller incision.- State the null and alternative hypotheses in terms of σ.
Analyze the data and explain which one would be the better medication for both a sore throat and a fever
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