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1. A normally distributed population has a mean µ=32 and a standard deviation ?=7. For a set of samples of size 8 taken from this population, about 99.7% of the means will be in what interval?
Can someone please answer and explain.
a computer assigns three character log-in ids that may contain the digits 0 to 9 as well as the letters a to z with
24 of the students in the sample received an "A". Test the instructor's claim at a 5% level of significance. What is your conclusion?
Set up the following null and alternative hypotheses for both factors and their interaction. You should have three verbal statements, not symbolized statements.
Random samples of size 64 are taken from a large population whose mean is 160 and whose standard deviation is 25. What is the mean of the sampling distribution of the sample mean?
What is your initial perception of this information? What are other ways, beyond looking at the p-value alone, you could use to try to interpret what this outcome of r(2398) = -.21 tells us about the relationship between length of time taking drug..
the mean and standard deviation of the lifetime of a battery in a portable computer are 3.5 and 1.0 hours
70 people received a higher score on the second test, 13 a lower score, and 1 received the same score. At the 0.05 significance level, test the claim that the music has no effect on memorization skills.
The Skateworld Company operates ice rinks in several major cities throughout the United States. During each session of open skating, one customer is selected at random to receive a free pass for a future open skating session.
Pages a user can expect from a print cartridge. A sample of 10 cartridges revealed the following number of pages printed. What is the point estimated of the population mean?
The researcher would like to create another regression model and use data from people who are currently students - In simple Ordinary Least Squares regression, the fitted line must always go through a particular point, which is found from the x and ..
A firm will promote two employees out of a group of six men and three women. list the chances of this experiment if there is particular concern about gender equity.
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one week period.
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