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If our decision in a hypothesis test is to fail to reject the null hypothesis, then do we know that the null hypothesis must be true?
The amount of time a bank teller spends with each customer has a population mean = 3.1 minutes and population standard deviation = 0.4 minute.
Assume that standard deviation is $3,204 and that 36 four-year institutions are arbitarily selected. Determine the probability that sample mean cost for these 36 schools is less than $25,000.
You estimate that the probability of getting both jobs is only 0.1. What is the probability that you get exactly one of the jobs?
A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
An orange juice producer buys all their oranges from one particular orchard. The amount of juice from the oranges is approximately normally distributed with a mean of 152 ml. and a standard deviation of 41 ml.
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
The following table shows the number of miles driven in each trial.
Recent medical research demonstrated there is a strong (r=.60) correlation between the excessive weight and incidences of breast cancer. How can we interpret this statement?
Assuming that the sample was not skewed (i.e. it was normally distributed), about how many exam scores would you expect to fall between the range of 75 to 85?
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
Test claim that mean responses are same for all populations of patients receiving either treatment and of either gender.
Based on observations of a few third graders in the lunch line, they assess P(P) as 0.75. More convincing evidence that P(P) is .75 would be?
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