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A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years. A random sample of 600 young adults not enrolled in college was selected and 150 of them had at least one motor vehicle accident in the previous two years. At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your pooled proportion?
If 100 percent of a days production is inspected whenever the sample of 10 gives 2 or more defectives, then what is the pobability that 100 percent of a days production will be inspected?
How many ounces should they advertise on the box if they want to be sure that no more than 0.5% of the boxes are filled less than that advertised amount?
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
Using the letter M for male and F forfemale. Define a second sample space S and where the elements represent the number of females selected.
Using an appropriate statistical test determine if there is a significant association between gender and satisfaction with the new initiative.
Prepare a 95% confidence interval for the average grocery bill. Would a 99% confidence interval be narrower or wider than the 95% confidence interval?
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
The following problem develop the concept of determining the probability distribution of random variable and its mean and variance.
The Bunte Auto Repair Shop received a shipment of four carburetors. One is known to be defective. If two are selected at random and tested.
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.
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