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Of 13 randomly selected college students, 12 said that they are on a socialnetworking website. Construct a 95% small-sample confidence interval for the proportion of all students at the college who are on the social-networking website. Note the sample size.a. (0.78, 1.07)b. (0.67, 0.98)c. (0.64, 1.00)d. (0.50, 1.00)
Statistical aptitude scores are known to be normally distributed, with mean = 50. A researcher has designed a new program intended to improve students statistical aptitude, and has enrolled a sample of 30 students in it.
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. Test the claim that p is less than 0.301 by using What is the value of the test statistic?
You are playing a game by drawing a card from a standard deck and replacing it. If the card is a face card, you win $30. If it is not a face card, you pay $2.
A Model for the World Series Two teams A and B play a series of games until one team wins four games. We assume that the games are played independently and that the probability that A wins any game is p. What is the probability that the series las..
There a flu epidemic that is spreading across SF County. You are a principle and are in charge of 32 teachers. You want to plan ahead and be able to estimate how many substitute teachers the school may need during this epidemic.
Compute the value of the discriminant and give the number of real solutions to the quadratic equation
It is one thing to note the number of people who do not respond to a survey, but few then go on the ask for reasons. Many people have speculated on the reasons, but one survey which routinely asks is the Family Resources Survey for the UK conducte..
Develop a simulation for finding the probability that when 50 people are randomly selected, at least three of them have the same birth date. Describe the simulation and estimate the probability.
What is the probability that you get a seat that would fail the stress test if failing is a score of 6.2 or less and estimate of those population parameters
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
Why does day light savings occur and what day does it start?
A local hardware store claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 20 customers has a mean of 3.7 minutes with a standard deviation of 0.8 minute. If α = 0.05, test the store's claim.
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