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Given the five pairs of (x, y) values,
x
0
2
4
6
8
y
5
7
Calculate the following least squares estimates. Carry out all calculations exactly and round to 3 decimal places the final answers only.
If 15 subjects take a pre-test and a post-test with a mean change score of 1.5, and if the standard deviation of the comparison distribution is calculated to be .5, what is the t score?
Assuming that 52 miles per gallon is the population mean and 2.4 miles per gallon is the population standard deviation, calculate the probability that the sample mean will be between 52 and 53.
1. for a population that is normally distributed with a mean of 100 and standard deviation of 10 what value would
Estimate the proportion of infants whose mothers experienced toxemia during pregnancy. Use 95% confidence level and doctors think that more than 20% of the infants their mothers experienced toxemia. Is that correct?
a sample of 36 patients in a doctors office showed that they had to wait an average of 45 minutes with a standard
Vincent Chiarella was employed as a printer in a financial printing firm that handled the printing for takeover bids. Although the firm names were left out of the financial materials and inserted at the last moment, Mr. Chiarella was able to deduc..
an urn contains six balls of which three are red and three are green. two balls are selected from the urn. if one ball
thirty percent of all telephones of a certain type are submitted for service while under warranty. of these 70 can be
Test the claim that a majority of people prefer the taste of fresh-brewed coffee. Report the large-sample z statistic and its P-value.
in a test of the hypothesis that alcohol consumotion affects reaction time a reasearcher reports that an alpha lever
For each of the given, indicate whether the variable is ordinal or not. If the variable is not ordinal, indicate its variable type.
If a study had a result of F (2, 147)= 4.56, p = 0.003, how many groups were in the study, and what was the sample size?
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