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Suppose that 98% of the customers in your market have Internet access, and you select a random sample of 500 customers. What is the probability that the same has: (a) greater than 99% of the customers with Internet access, (b) between 97% and 99% of the customers with Internet access, and (c) fewer than 97% of the customers with Internet access?
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
How many different ways to be appointed head of a division How many different ways could the three new heads be appointed?
If the sample size (n) is large, and the sample is a random sample, then the distribution of the sample mean x-bar is approximately a:
On average, 40 percent of U.S. beer drinkers order light beer. (a) What is the probability that none of the next eight customers who order beer will order light beer?
Tweleve cases of leukemia are reported in people living in a particular census tract over a 5 year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer incidence rates?
What is the approximate estimated bootstrap standard error of the median, What is the approximate bias of the median estimated from bootstrapping - What is the bootstrap t confidence interval for the median
A sample of 64 account balances from a credit card company showed an average balance of $1,040. A previously determined population standard deviation is $200.
Let C be a circle enclosing the distinct points z1,z2,...zn. Let p(z)=(z-z1)(z-z2)...(z-zn) be the polynomial of degree n with roots at these points.
A machine for making nuts is known to create nuts with a standard deviation in size of 0.20mm. A tradesman is required to adjust the machine to make 49mm nuts.
Determine the sample space of one such throw and determine the probability for each event and in the game of Ludo, a player has to throw one die and move a selected token based on the number shown on the die.
A. What is the 90% confidence interval for the daily sales at all restaurants. B. What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2..
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
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