Questions from Statistics

Q: Find the indicated probability and interpret the results. From 1975

Find the indicated probability and interpret the results. From 1975 through 2016, the mean gain of the Dow Jones Industrial Average was 456. A random sample of 32 years is selected from this populatio...

Q: A population has a mean µ and a standard deviation σ.

A population has a mean µ and a standard deviation σ. Find the mean and standard deviation of the sampling distribution of sample means with sample size n. µ = 790, σ = 48, n = 250

Q: Find the indicated probability and interpret the results. From 1871

Find the indicated probability and interpret the results. From 1871 through 2016, the mean return of the Standard & Poor’s 500 was 10.72%. A random sample of 38 years is selected from this population....

Q: Find the indicated probability and interpret the results. From 1871

Find the indicated probability and interpret the results. From 1871 through 2016, the mean return of the Standard & Poor’s 500 was 10.72%. A random sample of 38 years is selected from this population....

Q: Find the indicated probability and interpret the results. The mean

Find the indicated probability and interpret the results. The mean per capita carbon dioxide emissions in 58 industrialized countries over a 22-year period is 25.5 metric tons. A random sample of 44 c...

Q: Assume that the childhood asthma prevalences in Exercise 31 are normally distributed

Assume that the childhood asthma prevalences in Exercise 31 are normally distributed. Are you more likely to randomly select 1 city with childhood asthma prevalence less than 3.2% or to randomly selec...

Q: Assume that the carbon dioxide emissions in Exercise 32 are normally distributed

Assume that the carbon dioxide emissions in Exercise 32 are normally distributed. Are you more likely to randomly select 1 country with carbon dioxide emissions less than 30 metric tons or to randomly...

Q: A machine is set to fill paint cans with a mean of

A machine is set to fill paint cans with a mean of 128 ounces and a standard deviation of 0.2 ounce. A random sample of 40 cans has a mean of 127.9 ounces. The machine needs to be reset when the mean...

Q: A machine is set to fill milk containers with a mean of

A machine is set to fill milk containers with a mean of 64 ounces and a standard deviation of 0.11 ounce. A random sample of 40 containers has a mean of 64.05 ounces. The machine needs to be reset whe...

Q: Determine whether the random variable x is discrete or continuous. Explain

Determine whether the random variable x is discrete or continuous. Explain. Let x represent the number of pumps in use at a gas station.