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People's handshakes seem to be related to other aspects of their personalities (Chaplin, Phillips, Brown, Clanton, & Stein, 2000). For example, a firm handshake is negatively related to shyness. To measure the magnitude of this effect, a researcher obtained a sample of n =12 people who were rated as having firm handshakes and n = 8 who were rated as having weak handshakes. Both groups had 50% males and 50% females. Each individual was given a personality test measuring shyness. The average score for the firm handshake group was M = 43 with SS = 1170 and the average for the weak handshake group was M = 61 with SS = 990. Use the sample data to estimate how much difference there is in shyness between people with firm handshakes and people with weak handshakes. Make a point estimate and a 95% confidence interval estimate.
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
Dividend is expected to grow 7% a year for next 3 years and then at 5% a year after that. Determine the expected dividend per share for each of the next five years?
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Find the probability that the number of who consider themselves basketball fans is :
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.50 inches.
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
Find out coefficient of correlation between variables. Interpret the value.
Develop a hypothetical table of data using a grid of 3 rows and four columns.
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