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The GSS measures the amount of hours individuals spend on the Internet per week. Males use the Internet 10.17 hours per week (standard deviation 11.71, N=118), while women use the Internet 9.08 hours per week (standard deviation = 12.26, N =157_.
Test the research hypothesis that men use the Internet more hours than women, set alpha at .05.
Would your decision have been different if alpha were set at .01?
What rule of probability are you using to obtain the joint probabilities and why? In order to answer the 'why' part of the question you must tell me why the rule of probability you chose to use applies in this case.
Comparing the response times between 2 cab companies. companies A and B were each called at 50 randomly selected times. the calls to company A were independently made from the calls to company B. company A had a mean response time of 8.5 minutes with..
a project was planned using pert with three times estimates. the expected completion time of the project was determined
When we say we have confidence level of 95% what do you believe our "margin of error" is?
Misery loves company. It is time for the PE (professional engineer's exam). The results of the national test were normally distributed around the mean score of 70.
1.we are interested in comparing the proportions of males and females who think earning a large salary is very
Evaluate your histograms for any outliers in your data. Based on your evaluation of outliers, you may trim no more than 1% of the data contained in the data set. This must be done symmetrically (i.e., trimming no more than 0.5% off the top and 0.5..
What is the probability that there will be more than 6 accidents in a 1-hour period? What is the probability that there will be at most 2 accidents during the 2-hour busy period on a particular day?
Find the mean, median, mode, standard deviation, and variance. Analyze and explain why these statistical measures are important and how they apply to your data.
a researcher wants to estimate at a 99 confidence level the mean age of all persons who own sports cars. it is known
Identify a research issue, problem, or opportunity that uses data that has absolute zero measurements, ratio level data.
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
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