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Consider a population of 1024 mutual funds that primarily invest in large companies. You have determined that mu?, the mean? one-year total percentage return achieved by all the? funds, is 9.50 and that sigma?, the standard? deviation, is 2.50. Complete? (a) through? (c).
a. According to the empirical? rule, what percentage of these funds is expected to be within ?±3 standard deviations of the? mean? ___%
b. According to the Chebyshev? rule, what percentage of these funds are expected to be within ?±4 standard deviations of the? mean? ________% ?(Round to two decimal places as? needed.)
c. According to the Chebyshev? rule, at least 96?% of these funds are expected to have? one-year total returns between what two? amounts?
Between _____ and ______.
?(Round to two decimal places as? needed.)
Given your answer in part (a), which of these two alternative headlines do you think would be preferable: "Breast-feeding leads to better school performance".
For each female/male pair type, construct and interpret a 90% confidence interval for the population mean number of eggs produced by the female spider mite.
According to figures released by the National Agricultural Statistics Service of the U.S. Department of Agriculture, the U.S. production of wheat over the past.
question 1 a sample space consists of 64 separate events that are equally likely. what is the probability of
Exercise 1 In a survey to estimate the abundance of a rare animal species in a study region divided into N = 1000 units, an initial simple random sample of n = 100 units is selected.
the mean iq is 100 with a standard deviation of 14. suppose iq scores are normally distributed. if your iq is 116 what
To test Upper H0?: µ=100 versus Upper H1?:µ ?n?100, a simple random sample size of n=21 is obtained from a population that is known to be normally distributed.
given that z is standard normal random variable compute the following probabilitiesa p-1lt-zlt-0b
on the average mr. z drinks and drives once in 4 years. he knows that every time when he drinks and drives he is caught
Henry's dresser drawer has many lose socks: 5 gray, 5 black and 6 white. If two socks are randomly pulled out without replacement, what is the probability that both socks will be white?
(a) Construct a stem-and-leaf diagram for these data. Use the numbers 02, 03, 04, 05, 06, and 07 as stems.
In an entrance examination in Mathematics and Statistics, of the 120 students appeared for the examination, 65 passed in Mathematics, 75 passed in Statistics
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