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A sample of 186 randomly selected students, found that the proportion of students planning to travel home for Thanksgiving is 0.75. What is the standard deviation of the sampling distribution?
Round to 3 decimal digits.
the independent newspaper tabulated the gender of all candidates running for election in the 1992 british general
The flashlight batteries produced by Manufacturer X are known to have a mean life of 60 hours, with a standard deviation of 4 hours. At least what percentage of flashlights will have a life of 54 to 66 hours?
one person has 3 dollars to gamble each time he uses only one dollar the probability is 60 to lose and 40 to win. if he
There are many conventions within Egyptian imagery that go against our own iconography.
Explain the difference between the standard deviation of the sampling distribution of the mean and the standard error of the mean. Explain which one is more likely to be used in practice and why.
Headache relief Doctors identify "chronic tensiontype headaches" as headaches that occur almost daily for at least six months.
Describe a simulation to estimate the probability of answering at least four of the ten questions correctly. carry out three repititons. estimate the probability
an experiment involves selecting a random sample of 256 middle managers at a random for study. one item of interest is
Discuss the difference between sampling bias and measurement bias. Give exam, ples of statistical studies in which each is an important consideration.
The “test of independence” and the “test of homogeneity” are completed in identical fashion, using the contingency table to display and organize the calculations. Explain how these two hypothesis tests differ.
you and your opponent both roll a fair die. if you both roll the same number the game is repeated otherwise whoever
(a) What is the standard error of the mean? (b) What is the probability that the sample will have a mean between 55 and 58 MPH?
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