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The mean score of a college entrance test is 500; the standard deviation is 75. The scores are normally distributed. What percent of the students scored below 320?
About 50.82%
About 34.13%
About 7.86%
About 0.82%
a manufacturer of clothing knows that the probability of snap flaws is 0.005. an inspector examines 50 shirts in an
On the basis of the sample results, can we conclude that the mean annual lease rate is higher in Hong Kong than in Paris? Develop appropriate null and alternative hypotheses.
compute the correlation coefficient for the data below to the thousandths place please show workx values-2-103y
assume that the number of sick kids in a family is a discrete random variable x with probability function px
The random variable x, which is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length.
a political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote
verify that the function fx 3414x x 0 1 2... is a probability mass function. determine the requested probabilitiesa
A thermometer is randomly chosen and tested at 0 degrees C. What is the probability of a reading of less than -2.75 degrees C?
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
How large of a sample should be studied if the standard deviation from a previous study was 26 cents and he wants his estimate to be accurate to within 15 cents?
For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 40 %.
the following probability distributions of job satisfaction scores for a sample of information systems is senior
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