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He claim is that more than 75% of adults always wear a seat belt in the front seat. A Harris poll of 1012 adults resulted in 870 who say that they always wear a seat belt in the front seat. Find the value of the test statistic z for proportion.
Numbers of people who live in the north, both aboriginal and non-aboriginal. See an inconsistency here within the law. Their use of them - then why would we allow this?
If the 95% confidence interval for the average age of a learner at Capella is 27.8 yrs.
A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44.
In a class of 40, 16 driver a car made outside the United States. What is the confidence interval for the total population of students at the 95% level?
A technician services machines as companies in the Phoenix area. Depending on the type of malfunction, the service call can take exactly 1, 2, 3, or 4 hours. The different types of malfunctions occur at the same frequency.
Is there a statically signifant relationship between these variables. b. Compute column percentages for the table to determine tthe pattern of the relationship.
To find out whether two categorical variables are independent, one should use the.
A quality inspector is interested in the time spent replacing defective parts in one of the company's products. The average time spent should be at most 20 minutes per day according to company standards.
What does standard deviation measure? In looking at the standard deviations of the "with fireplace" and "without fireplace" selling prices, one is much larger than the other.
The top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
Find out the probability that disc doesn't touch line between two planks. Find out also expected distance from center of the disc to closest line between two planks.
There are 400 employes and 100 of them smoke. There are 250 males working for the company and 75 of them smoke. What is probability of an emloye selected random?
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