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Construct a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.60 and a sample size equal to 150.
In a study comparing individual performance with group performance
the scores of a random sample of 8 students on a physics test are as follows 60 62 67 6970 72 75 and 78. test to see if
Determine the probability that exactly 8 of them started smoking before 18 years of age.
a researcher wants to estimate at a 99 confidence level the mean age of all persons who own sports cars. it is known
If 15% of the suitcases are overweight, find the maximum weight allowed by the airline. Assume the variable is normally distributed.
A poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
what is the f ratio? why is the computation of the f ratio based on mean squares instead of sums of
A person claims to have ESP (extrasensory perception). A coin is tossed 16 times, and each time the person is asked to predict in advance whether the coin will land heads or tails.
the survival rate during a risky operation for patients with no other rate of survival is 76. what is the probability
Pepsi wanted to test to determine if the males preferred Pepsi more than the females. (a) PConduct the appropriate test and describe the results (ick your own alpha value)
(a) Find the mean and the standard deviation of X
There are two rejected units. If a customer orders 180 units, what is the probability that the delivery will have at least one reject unit?
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