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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.
You listen to radio station for 1 hour, at arbitrarily selected time, and carefully observe that amount of advertising time is equal to 7 minutes. Compute z-score for this amount of advertising time.
Mr. Olsen uses an unusual grading system in his class. After each test, he transforms the scores to have a mean of 0 and a standard deviation of 1.
Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.
Two machines are supposed to be producing steel bars of approximately the same length.- Construct and interpret the 95% confidence interval for the difference between the population means.
For p1 = p2, find the probability that their first successes are simultaneous, and use this to find the probability that Nick's first success precedes Penny's.
To the firm itself, would this information be primary data or secondary data?- To a competitor, what type of information would this represent?
what was the modal response and What strikes you about this frequency distribution - What does the graph suggest about the center and spread
An employer interviews 10 people for 5 management positions in a company and 5 of the 10 people are men. if all 10 are qualified, in how many ways can employer fill the management positions if exactly 2 are men?
to investigate the relationship between yield of potatoes y and level of fertilizer application x a researcher divides
What proportion of municipal bonds is issued by suburbs and What is the probability that a randomly selected visit will last between 60 and 90 minutes?
Determine the critical value for a left-tailed test of a population mean at the α=0.005 level of significance based on a sample size of n = 30
For the data in given Exercise, determine the ideal fourths and the corresponding interquartile range.- verify that the sample variance and Winsorized variance are 7.4 and 1.8, respectively.
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