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According to the Sacramento Bee, Americans are not getting enough sleep per night. Assume that the distribution of sleep hours for Americans is Normal and has standard deviation 2 hours. Suppose we take many SRSs of Americans, each of size 10, and calculate the average hours of sleep per night for each sample. According to the 95 part of the 68-95-99.7 rule, 95% of all values of fall within __________ on either side of the unknown mean . What is the missing number?
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Sketch a histogram of these data and give the modal class.
Consider the relationship between derived scores and the normal curve. In terms of the normal curve and how it relates to psychological testing and assessment.
List the simple events in the sample for this experiment. Assuming that each pair of city council members has an equal chance of being selected, assign probabilities to each simple event.
Determine the probability that subscriber didn't rent the car during past 12 months for either business or personal reasons?
Find the probability of committing a type I error.
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two sampl..
Michelle is a counselor at the local crises center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
If a student is randomly selected what is the possibility that the student is male and from out of state.
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
Which of the following sets of data provides the clearest diffrence between the two samples?
A group of workers on a manufacturing assembly line type information into a computer. They take a training class on how to use a computer, especially as related to data entry.
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