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The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200
a. Nancy Bright's SAT score was 1390. What percentage of students have scores more than Nancy Bright?b. What percentage of students score between 1100 and 1200?c. What are the minimum and the maximum values of the middle 87.4% of the scores?d. There were 165 students who scored above 1432. How many students took the SAT?
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
For certain bird species, wiith appropriate assumptions, the number of nests escaping predation has a binomial distribution. Suppose the probability of success (that is, a nest's escaping predation is .3. Find the probability that at least half of..
Find an integer k that the probability is at least .99 that you will find k invoices that overcharge the customer. Use trial and error with the BInomdist function to find k.
A bowl contains 20 chips, of which 9 are red, 8 are white and 3 are blue. Six chips are taken at random and without replacement. Find the probability that each of the 6 chips is red.
According to an article, 19% of the entire US population have high-speed access to the Internet. Random samples of size 200 are selected from the US population.
What is the appropriate inferential statistical test for the case scenario? Why?
A recent article in theWall Street Journal reported that the prime rate for large banks now exceeds 9 percent. A sample of eight small banks in the Midwest revealed the following prime rates (in percent):
You have 4 jars. In the largest jar you have three balls numbered 1 to 3. Then you have 3 colored jars. Jar 1 has a red ball and two orange balls.
Find the best point estimate of the mean salary of all NCAA football coaches.
Anthony is measuring his participants' emotional states in two different ways (self-report and galvanic skin response) in order to gain a greater confidence that he is actually measuring the emotional that he thinks he is.
Find the probability that the first ball drawn is red and the second ball drawn is green. Place your answer, rounded to 4 decimal places, in the blank.
Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
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