Mathematics, 21.03.2020 02:05, u8p4

A survey asked 40 people if they were concerned about the environment - 6 said that they were very concerned. Which of the following statements correctly describes how the confidence interval for the population proportion of people that are very concerned about the environment should be computed?

A. There are not 15 successes and 15 failures. A confidence interval can be computed by adding 9 successes and 9 failures.

B. There are at least 15 successes and 15 failures. A large sample confidence interval for the population proportion can be computed (phat +/- z * sqrt(p*(1-p)/n) with no additional values added.

C. There are not 15 successes and 15 failures. A confidence interval can not be done.

D. There are not 15 successes and 15 failures. A confidence interval can be computed by adding 2 successes and 2 failures.

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 17:40, nicole5918

Which of the following are accepted without proof in a logical system? check all that apply.

Answers: 1

continue

Mathematics, 21.06.2019 18:30, Jenniferwolf

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Answers: 1

continue

Mathematics, 21.06.2019 19:30, valerieaj113

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Answers: 2

continue

Mathematics, 21.06.2019 20:30, attp203

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

Answers: 3

continue

Do you know the correct answer?

A survey asked 40 people if they were concerned about the environment - 6 said that they were very c...