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1. Of three cards, one is painted red on both sides; one is painted black on both sides; and one is painted red on one side and black on the other. A card is randomly chosen and placed on a table. If the side facing up is red, what is the probability that the other side is also red?
2. A couple has 2 children. What is the probability that both are girls if the eldest is a girl?
Two impendent samples of signs 9 and 8 gave the sum of squares of deviation from their respective means as 160 and 91 can the samples be regarded as drawn from the normal population with equal variance
a researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population
The mean change score for the sample studied is an increase of 5.2. What is considered a medium effect size for a t test for dependent means?
Let x be a random variable that represents a braking distance. Find the probability that a randomly selected braking distance is less than 49 meters.
Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, they use different media to reach potential buyers.
If one of these consumers is randomly selected, what is the probability that the person prefers design A and is under 25?
A random sample of 40 part time workers has a mean annual earnings of $3120 and a population standard deviation of $677. Compute the 95% confidence interval for the mean.
Following are the data collected. Should the head of the Bureau be concerned about the time taken at lunch by employees? Why?
a sample of size 21 is taken and a significance test for h0 u 0 versus ha u doesnt equal 0 is run. the test
according to the pew internet amp american life project 75 of american adults use the internet. the pew project authors
the average life span for batteries is 100 hours with a standard deviation of 10 hours. construct a confidence interval
Analyst computes production cost per unit in each order and averages these to get $50.
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