Question

Font Paragraph ard 15. Find the standard deviation of this sample: 4, 7,9, 12, 15. a. 4.550 b. 3.798 c. 4.278 d. 2.997 16. A politician who is running for the office of governor of a state with 3 million registered voters commissions a survey. In the survey, 53.6% of the 5,000 registered voters interviewed say they plan to vote for him. The population of interest is the: a. b, c. d. 5,000 registered voters interviewed 53.6 %, or 2,680 voters interviewed who plan to vote for him 46.4%, or 2,320 voters interviewed who plan not to vote for him 3 million registered voters in the state 17. When data are collected in a statistical study for only a portion or subset of all elements of interest, we are using a. a sample b. a parameter c. a population d. Both b and c Use for questions 18 to 20. Dr. Stubborn only likes to use cash when making purchases. However, since he has begun shopping online, he has had to make some purchases using his credit card. Dr. Stubborn wants to have a better idea of how he is spending his money online. Below is a sample of the dollar amounts of purchases he has made using his credit card. Please answer the following questions based on these. 100 85 25 8496 39 105 99 85 105 18. What is the mean of the sample? a. 81.60 b. 79.70 c. 84.50 d. 82.30 O Type here to search

Answer 1

15) Option c

Sample standard deviation= 4.278

16) Population of interest is 3 million registered voters in the state.

17) sample

18) mean = 823/10= 82.30

Option D.