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1) Suppose that 5% of cereal boxes contain a prize and the other 95% contain the message, "Sorry, try again." If a person buys 10 boxes,
a) What is the probability that she will get at least one prize?
b) What is the probability that she will get exactly 1 prize?
c) What is the probability that she will get the message "Sorry, try again," at least seven times?
d) What is the expected number of prizes?
e) What is the standard deviation of prizes?
a study is conducted to compare three new appetite suppressants a b and c to a placebo in terms of their effects on
a brewerys filling machine is adjusted to fill bottles with a mean of 31.2 oz. of ale and a variance of 0.003.
1. the epa wants to test randomly selected sample of n water specimens and test the mean daily rate of pollution
Suppose that 255 such companies are selected independently and at random. (a) What is the probability that 186 companies in the sample electronically monitor their employees?
In the belief that Statistics is too hard, a student claims that the mean score on a final exam is less then 70. 15 scores will be chosen at random to test this claim.
At the .10 significance level you will test to determine if there has been an increase in selling time. What is your decision?
Find the probability that x is less than or equal to 8 using the normal approximation to the binomial and what is the probability that less than 7 of the calculators will be defective?
Part A: Russia is well known to be amongst the most adroit nations at manipulating public opinion in other countries via its foreign influence operations. A Russian SVR agent has 45 million dollars
From an inventory of 48 cars being shipped to local automobile makers, 12 have defective radios installed. What is the probability that one particular dealership receiving 8 cars will find 2 radios being defective? Make assumptions if necessary.
Positive values correspond to students who gained weight and negative numbers correspond to students who lost weight. Is a weight fain of 15 pounds of (6.8) kilograms unusual?
The mean and standard deviation of these scores are 23.0 and 5.0 respectively. The test was administered to 100 students. What is the T-score equivalent to the raw-score 13?
Mr.Smith works on a temporary basis. The mean length of each job he gets is three months. If the amount of time he spends between jobs is exponentially distributed with distributed with mean 2, then at what rate does Mr. Smith get new job?
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