For the following set of scores: 1,4,3,5,7 (a) If the scores are a population, what are the variance and standard deviation?

(b) If the scores are a sample, what are the variance and standard deviation?

I'll give brainliest if you answer right : )

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.