Questions from Business Statistics

Q: In a group of 10 batteries, 3 are dead. You

In a group of 10 batteries, 3 are dead. You choose 2 batteries at random. 1. Create a probability model for the number of good batteries you get. 2. What the expected number of good ones you get? 3. W...

Q: In a litter of seven kittens, three are female. You

In a litter of seven kittens, three are female. You pick two kittens at random. 1. Create a probability model for the number of male kittens you get. 2. What the expected number of males? 3. What the...

Q: Given independent random variables with means and standard deviations as shown,

Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of: 1. 3X 2. Y+6 3. X+Y 4. XY 5. X1+X2

Q: Given independent random variables with means and standard deviations as shown,

Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of: 1. X20 2. 0.5Y 3. X+Y 4. XY 5. Y1+Y2

Q: A random sample of 1000 patients was taken from a large medical

A random sample of 1000 patients was taken from a large medical center database. The six variables included are Sex (M/F), Age (years), Insurance coverage (yes/no), Number of children (010), Marital s...

Q: For the roller coaster data in Exercise 49: 1.

For the roller coaster data in Exercise 49: 1. Examine the relationship between Initial Drop and Speed. 2. Examine the relationship between Initial Drop and Height. 3. What conclusions can you safely...

Q: Given independent random variables with means and standard deviations as shown,

Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of: 1. 0.8Y 2. 2X100 3. X+2Y 4. 3XY 5. Y1+Y2

Q: Given independent random variables with means and standard deviations as shown,

Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of: 1. 2Y+20 2. 3X 3. 0.25X+Y 4. X5Y 5. X1+X2+X3

Q: A grocery supplier believes that in a dozen eggs, the mean

A grocery supplier believes that in a dozen eggs, the mean number of broken ones is 0.6 with a standard deviation of 0.5 eggs. You buy 3 dozen eggs without checking them. 1. How many broken eggs do yo...

Q: A company selling vegetable seeds in packets of 20 estimates that the

A company selling vegetable seeds in packets of 20 estimates that the mean number of seeds that will actually grow is 18, with a standard deviation of 1.2 seeds. You buy 5 different seed packets. 1. H...