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A computer chip producer claims that no more than 2% of chips it send out are defective. New QA scheme needs regular testing and sample of 300 chips is tested of which 10 are defective. Define null and alternative hypothesis and, using sample info. Test manufacturer's claim at 0.01 (1%) level of significance.
What does it mean to say that a particular value of x has a z-score of -2.1?
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
What is the 95% confidence interval estimate of the population mean cost for a prescription of Zocor?
Would the method described above be a good way to determine which team was taller (explain why or why not)?
A box contains four tickets, one marked with a star and the other three blank. One draw is made from this box at random.
The 99% confidence interval using a t-distribution is ( ), ( ). Round to one decimal place as needed
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
Jill constructs a test to measure a personality state. The test consists of multiple items which sum up to indicate the degree of the trait that is present.
In the week before and the week after a holiday, there were 10,000 total deaths, and 4972 of them occurred in the week before the holiday.
You're considering paying $5 to buy a ticket in a local lottery. You were told that 10,000 tickets will be sold. There are 5 prizes. The first prize is $5,000, the second is $1,000, the third is $500, the fourth is $100 and the last prize is $10.
Consider a random sample of size n from an exponential distribution, Xi ~ EXP(1,eta). a) Show that Q = X1:n - eta is a pivotal quantity and find its distribution.
An independent testing services road-tested 36 of the automobiles.
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