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Sample proportion and probability based on normal distribution.
A nationwide study in 2003 indicated that about 60% of college students with cell phones send and receive text messages with their phones. Suppose a simple random sample of n = 1136 college students with cell phones is obtained.1. Describe the sampling distribution of p' , the sample proportion of college students with cell phones who send or receive messages.?2. What is the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?
Sample of size 26 was taken from normal population with standard deviation 1.697. Approximate the probability that standard deviation of sample is greater than 1.23.
Determine the event that the sum of the numbers falling uppermost is less than or equal to 7
Run a regression of Y on X in Excel and turn in the output with a note explaining what the coefficients {correlation coefficient (multiple R), standard error, t-statistic and F-statistic} mean.
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
Suppose that during a basketball practice. Joe tries 3 shots from the free throw line; imagine further that he has a probability equal to 0.6 of making each shot and that the attempts are independent. Let 'X' be the number of baskets he makes in t..
What can we conclude from these figures at a level of significance of .01?
What is the probability that a cereal would be high calorie, given that is low fiber? In other words, what is P (high calorie, given low fiber)?
The airline must sell 150 seats to break even on this particular flight. On what percent of the flights does the airline make money?
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
Use a 0.05 significance level to test the claim of a cereal lobbyist that the mean for all cereals is less than 0.3g.
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