A cat breeder has many cats whose weights average 22 pounds with an SD of 4 poun
ID: 3350711 • Letter: A
Question
A cat breeder has many cats whose weights average 22 pounds with an SD of 4 pounds. Assume that the amount would be normally distributed.
A. What is the probability that a randomly selected cat weights more than 25lb? Answer:_______(enter a, b, c, d or e)
a. 0.23 b. 0.31 c. 0.69 d. 0.91 e. 0.77
B. What is the probability that a randomly selected cat weights between 23 to 26lb? Answer:_______ (enter a, b, c, d or e)
a. 0.16 b. 0.31 c. 0.77 d. 0.24 e. 0.06
C. How many of the next 100 cats will weight less than 28lb? Answer:______ (round DOWN, that is, round the answer to the closest integer below the number (no decimals). That is, if the answer is 10.9378, enter 10). Hint: Think about what is the probability that a cat weights less than 28lb. Then think, if you have 100 cats, how many will weight less than 28lb?
a. 2 b. 43 c. 54 d. 93 e. 97
Explanation / Answer
a)
option A is correct
b)
option D is correct
c)
therefore number of cars =np=100*0.9332 =~93
option D is correct
for normal distribution z score =(X-)/Related Questions
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