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What does a negative correlation statistic value mean?
A For most individuals, both variables had values less than zero
B The results are the opposite of what was expected
C On the whole, individual with low values on one variable tended to have low values on the other variable
D On the whole, individuals with high values on one variable tended to have low values on the other variable
For a random sample of 10 fifth generation iPod music players, the mean battery life was 9.47 hours with a standard deviation of 2.14 hours.
1. of 1906 people who came into a blood bank to give blood 300 people had high blood pressure. estimate the probability
a simple random sample of 40 salaries of ncaa football coaches has a mean of 415953 and a standard deviation of
Classic Golf, Inc. manages five courses in the Jacksonville, Florida, area. The Director wishes to study the number of rounds of golf played per weekday at the five courses. He gathered the following sample information.
the number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a
the length of time in seconds that a user views a page on a web site before moving to another page is a lognormal
What is the probability that more than one machine is in the system? Probability that more than two are broken and waiting to be repaired or being serviced? More than three? More than four?
Use this information to construct a probability table, and then calculate each of the following probabilities:
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
1.a study was performed to examine the personal goals of children in grades 4 5 and 6. a random sample of students was
A student population consists of 55% females and 45% males. A researcher recorded the gender of each student emerging from a theater and found a total of 385 females and 215 males.
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