CHAPTER 3 NON REGEN Graph I. Graph II. Graph III. Graph IV. (b) Use Table A in t
ID: 3430138 • Letter: C
Question
CHAPTER 3 NON REGEN
Graph I.
Graph II.
Graph III.
Graph IV.
(b) Use Table A in the text to find the proportion of observations with values less than 2.85. (This is the proportion satisfying z < 2.85)
Answer to 4 decimal places.
2. (a) In which of the standard Normal curves shown below does the shaded area represent the proportion of observations with values between -1.66 and 2.85 (-1.66 < z < 2.85)?
Graph I.
Graph II.
Graph III.
Graph IV.
(b) Use Table A in the text to find the proportion of observations with values between -1.66 and 2.85. (This is the proportion satisfying -1.66 < z < 2.85)
Answer to 4 decimal places.
3. In each density curve shown below, determine which points represent the mean and the median?
-Point A. Point B. Point C. Mean
-Point A. Point B. Point C. Median
-Point A. Point B. Point C. Mean
-Point A. Point B. Point C. Median
-Point A. Point B. Point C. Mean
-Point A. Point B. Point C. Median
PICK EITHER POINT A,B,C, FOR BOTH MEAN AND MEDIAN
4. The daily milk production of a herd of cows is assumed to be Normally distributed with a mean of 31 liters, and standard deviation of 8 liters.
A) On what proportion of days is daily production less than 53.4 liters?
Answer= (Round your answer to 3 decimal places.)
B) On what proportion of days is production more than 53.7 liters?
Answer= (Round your answer to 3 decimal places.)
5.The lengths of pregnancies in a small rural village are Normally distributed with a mean of 266 days and a standard deviation of 15 days.
What percentage of pregnancies last beyond 253 days?
P(X > 253 days) = %
Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
6.A company knows that replacement times for the quartz time pieces it produces are Normally distributed with a mean of 10.7 years and a standard deviation of 1.6 years.
Find the proportion of a randomly selected quartz time pieces that will have a replacement time less than 7.8 years?
P(X < 7.8 years) =
Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
If the company wants to provide a warranty so that only 3.5% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty?
warranty = ____ years
Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Explanation / Answer
1.
Graph 1 0.998 2. Graph1 0.949 3. B,B A,B C,B 4. 0.997 0.002 5. 80.694 6. 0.035 7.801