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1. In the table below we examine the relationship between final grade and the reported hours per week each student said they studied for the course.
In a test of no association between these variables, we are really studying a model ofA. independence.B. comparing several populations.C. Neither choice is correct.
2. In the table below we examine the relationship between final grade and the reported hours per week each student said they studied for the course.
The size of this table isA. 4 x 6.B. 5 x 3.C. 3 x 5.
3. A large company is being sued for a perceived lack of female managers. The data are
Do we have evidence that females are being discriminated against?
The χ2 statistic value isA. 0.1304.B. 0.9368.C. 0.3638.
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
Find out a 95% confidence interval for the proportion p of adults who have a great deal of trust and confidence in the executive branch of government.
construct a frequency distribution table and describe the shape of the distribution, what score identifies the center for the distribution and are the scores clustered or spread across the scale?
You take a random sample and perform a hypothesis test, getting a p-value of 0.2578. What is the appropriate conclusion? Conclude at the 5% level of significance.
The selection committee of the club is willing to use a 0.01 significance level. You are required to find out whether Amod's salary will be cut next year.
A special test is given to people complaining of sever headaches. if someone has a brain tumor, the test is positive with a probability of .8 (80%).
Listed below are measured loads (in lb) on the left femur of crash test dummies used in the same cars listed in the Chapter Problem. Use a 0.05 significance level to test the null hypothesis that the different car categories have the same mean. Do..
Testing equality of variances - evidence of a difference in the variability of monthly talking time on cell phones for men and women?
Ball bearings are mannormally distributed with a meanufactured with a diameter of 5 mm. But the process has variation, so the diameter is normally distributed with a mean of 5 mm and a standard deviation of .02 mm. A) What proportion of ball beari..
A researcher collects data on children's weights from a random sample of children in the South and concludes that children in the South weigh less than the national average.
All of these cars are for sale by dealers. Produce a dotplot of the prices and comment on features of the dotplot. Suggest a reasonable asking price for the 2005 Escape. Explain your reasoning.
The evidence supports the manufactuer claim at the .05 significance level. Suppose 49 bulbs were tested with the folowing results: x-bar = 827.5 hours, s= 70 hours. Conduct the test using alpha=.05.
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