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Validate the probability distribution
Determine the distributions given below represent a probability distribution. Justify your answer.
x
20
30
40
50
P (x)
0.3
0.2
0.1
0.4
Explain why random samples are preferred to nonrandom samples.
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
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Determine expected cell counts if null hypothesis is true and show them in a two-way table. Determine the chi-square() statistic?
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In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
Explain the value of test statistic using t distribution for the given value. Illustrate value of the t test statistic if you are testing a hypothesis.
The mean time to download an Google video is 1 minute 30 seconds. Suppose the download time is normally distributed with standard deviation of 20 seconds.
What is the probability that a particular driver had exactly two speeding violations?
Explain which indicate that changes in the concentration of carbon dioxide which cause changes in the global temperature
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
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