Question

Question 17

1. The mean of a distribution is 20 and the standard deviation is 2. At least what percentage of the values will fall between 10 and 30? Do not round the percentage. Blank 1 %

Question 18

1. The exam scores of 20 students were recorded as follows: 73, 87, 62, 98, 43, 90, 88, 97, 100, 87, 95, 100, 56, 78, 100, 88, 70, 78, 63, 78 Find the MODE. If there is no mode, type No Mode. If there is more than one moe separate them with commas (example: 34, 6). Blank 1

Question 19

1. Find the weighted mean of the number of hours 17 college students watched television.

   Number of Students	Hours
   8	6
   6	4
   3	2

   Round your answer to one decimal place (example: 6.5).

   Weighted Mean: Blank 1

Question 20

1. The average amount of a purchase at a pipe and tobacco store is $2.12. The standard deviation is $0.45. 95% of the amount of purchase fall between what to prices? Put your answer in as dollars with cents (example: $5.67). Do not round or your answer will be marked incorrect. Blank 1 and Blank 2

Question 21

1. The average age of nurses at Three Rivers Hospital was 32, with a standard deviation of 6 years and the average salary of the nurses was $24000, with a standard deviation os $8000. Which is more variable? Type in the CVar as a percent rounded to two decimal places (example 6.78). Ages: CVar: Blank 1 % Salaries: CVar: Blank 2 % Type in either Ages or Salaries: Which is more variable? Blank 3

Answer 1