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The managers in a company’s East and West regions were rated on the basis of the company’s evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calculation.
Region Manager Rating Region Manager Rating
West 1 74 East 1 81
West 2 88 East 2 63
West 3 78 East 3 56
West 4 85 East 4 68
West 5 100 East 5 80
West 6 114 East 6 79
West 7 98 East 7 69
A study was completed that examined the relationship between coffee consumption and level of stress for a group of 50 undergraduate students. The correlation was .373, and it was a two-tailed test, done at the .01 level of significance.
Describe the role of postsynaptic potentials (excitatory and inhibitory), synaptic transmission, and receptors in producing and regulating behavior.
The average stock price for companies making up the S&P 500 is $30, and the standard deviation is $8.20. Assume the stock prices are normally distributed.
A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?
Cardio-Pulmonary Resuscitation (CPR). In 180 days of school, about how many days can we expect that the teacher on bus duty will likely be certified in CPR?
The hypothesis test produces a z-score of z = 2.37. Assuming that the researcher is using a two-tailed test, what decision should be made?
A discussion of extreme weather reports that: "In most states, hurricanes occur infrequently. Yet, when a hurricane hits, the losses can be catastrophic.
Find the probability that the age of a randomly selected CEO will be between 56-57 y/o. (round to 4th decimal) The probability a randomly selected CEO will be between 56-57 y/o is?
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random
Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Explain.
Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation greater than 10 beats per minute.
A researcher collected sample data for 17 women ages 18 to 24 . The sample had a mean serum cholesterol level (measured in mg/100 mL) of 188.8 , with a standard deviation of 5.5.
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