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A researcher selects a sample of 19 women and asks them to rate how important a sense of humor is in someone they want a long-term relationship with. She records scores on a rating scale from -3 (not important at all) to +3 (very important). The mean score in her sample is 1.8 and the standard deviation is 0.6. Assuming that an average score of 0 is the null hypothesis, test whether or not women find this trait important at a .05 level of significance.
Use critical values and the previously given sample information to test the hypotheses you set up in part α by setting α equal to .10, .05, .01, and .001. How much evidence is there that the manufacturer's claim is false?
What is the Variance, Standard Deviation and Range of the following set of scores? 20,24,26,22,18,16,18 and then 10,15,12,18,19,16,12
the environmental protection agency epa has established national ambient air quality standards in an effort to control
A statistics profressor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 60.0 minutes. Find the probability that a given class period runs great than 50.5 minutes.
If the distribution of calls is Poisson, what is the probability of receiving at least 4 calls during a particular minute?
Determine the test criteria that would be used to test Ho: u 1.0 with n=18 and significance level of 0.01 using the classical approach.
A professor told a class that she found a correlation coefficient of .20 between the alphabetical order of a person's last name and that person's cumulative.
A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those
The number of hours that should be worked by a full-time bar attendant is stipulated in the Queensland award as 36.25 hours per week.
Perform a test of hypothesis to test the conjecture at the a = .05 level of significance.
Suppose someone claims that students in higher years at school tend to earn more money, because they are older and have more work experience.
To test the null hypothesis that the mean waist size for males under 40 years equals 34 inches versus the hypothesis that the mean differs from 34, the following data were collected: 33, 33, 30, 34, 40, 35, 35, 32, 32, 34, 36, 30 calculate the T-v..
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