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You notice in your introductory psychology class that more women tend to sit up front, and more men sit in the back. To determine whether this difference is significant, you collect data on the seating preferences for the students in your class. The data follow.
Men WomenFront of the Room 15 27Back of the Room 32 19
a. What is X2 obt?b. What is df for this test?c. What is X2cv?d. What conclusion should be drawn from these results?
Let x be the weight of a fawn in kilograms. Convert the following x interval to a z interval. Round to the nearest hundredth.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
The population of IQ scores forms a normal distribution with a mean of u=100 and a standard deviation with a mean of sigma=15.
Use SPSS and generate all necessary summary statistics and figures (e.g. boxplots, histograms and/or scatter plots) to describe the relationship between the workers' mental health
The following random sample was collected: 22 33 44 6 The 80% confidence interval for the mean is?
a fair dice is tossed. let x denote the number that appears and let y1 if an odd number appears and y3 if an even
The average number of calories in a small chocolate bar is 225. Suppose that the distribution of calories is approximately normal with 10. Find the probability that a randomly selected chocolate bar will less than 200 calories.
Over the past few years, banks have strongly promoted online banking and the paying of bills online. In 2003, about 50% of internet users paid bills online.
for the z-score equation if given the standard deviation as well as n how do we know whether to make the standard
The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of four hours. What is the probability that you do not receive a message during a two-hour period?
If we assume that the monthly rents for apartments on the east side are normally distributed, is there enough evidence to conclude, at the .05 level of significance, that is less than $675?
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
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