Imagine we choose an American household at random and define the random variable C to be the number of cars (including SUVs and light trucks) the household owns. The standard deviation of C
is 1.08. Which of the following is the best interpretation of this value?
A) The number of cars would be at most 1.08 from the mean.
B) The mean number of cars would be about 1.08 from the expected value.
C) The mean number of cars would be around 1.08
D) The number of cars would be within 1.08 from the mean about 65% of the time.
E) The number of cars would typically be about 1.08 from the mean.

Fran would like to estimate the mean amount of time it takes people in her town to travel to work. the town's population is 150,000 and about 90,000 of those are working adults. which statements are true? select each correct answer. there is no way to infer the value of the mean. she must collect data for all 90,000 working adults and calculate the mean. a larger sample of working adults will provide a better estimate of the true mean than a smaller sample. the population of working adults is too large for using a sample to estimate the mean of the entire group. if she takes a random sample of the population of working adults in her town, the mean for that group is likely close to the mean for the entire group.

Match each graph with the correct equation from the equation bank. not all equations will be usef

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.