Population is left-handed
Suppose that 10% of a population is left-handed. What is the probability that in a sample of n=10 individuals,3 or more individuals are left-handed?
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A random sample of n = 16 scores is obtained from a population with a mean of µ = 80 (assume ? is unknown) and a treatment is administered to the sample. After treatment, the sample mean is found to be M = 82 (assume higher numbers mean the
An urn contains w1 white and b1 black balls. A second urn contains w2 white and b2 black balls. A ball is selected at random from the first urn and placed in the second urn. Then a ball is selected from the second urn.
A sample of 24 of 172 funded projects revealed that 17 were valued at $17,200 each and 7 were valued at $20,480 each. From the sample data, estimate the total value of the funding for all the projects.
Jim takes a simple random sample of 15 from a very large population whose variance is unknown. She intends to perform a one-tail test for the mean, so draws a boxplot of the sample values and finds that distribution of the sample values is roughly
Assuming the incomes are normally distributed, find the percentage of women age 25-34 whose 2004 incomes range from $19,000 to $34,000.
One study has reported that the sensitivity of the mammogram as a screening test for detecting breast cancer is 0.96, while its specificity is 0.93. It is estimated that 10% of women aged 55-75 in a particular population has breast cancer. What is
A die is rolled 24 independent times. Let Y be the sum of the 24 resulting values. Recalling that Y is a random variable of the discrete type approximate: (a) P(Y >= 86) (b) P(Y < 86) (c) P(70 < Y <= 86).
By means of a scatter Diagram, Determine if there is a relationship between hours of machine use and millimeters of the target. Data for 20 (x,y) pairs with hours of machine use as the x variable are
How much money can be withdrawn at the end of 21 years if $6,000 is deposited at the end of each year for 14 years, and no deposits are made after, where the fund earns 1.2 percent?
The machining center at a production facility has three lathes of differing ages and thus precision. The oldest, machine A, produces finished units of product of which 88% are good, 8% are blemished, and 4% unusable.
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