The scores at a golf course recorded last year followed a normal distribution with mean 78 and standard deviation 11. You choose an SRS of 15 scores and calculate xbar = mean score. Which of
the following are the mean and standard deviation of the sampling distribution of x bar?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.

Multiply and simplify. 2x2y3z2 · 4xy4x2 how to do?