Question

Use the normal distribution of fish lengths for which the mean is

1010

inches and the standard deviation is

44

inches. Assume the variable x is normally distributed.

left parenthesis a right parenthesis(a)	What percent of the fish are longer than 1313 ​inches?
left parenthesis b right parenthesis(b)	If 200200 fish are randomly​ selected, about how many would you expect to be shorter than 66 ​inches?

left parenthesis a right parenthesis(a)

Approximately

nothing​%

of fish are longer than

1313

inches.

​(Round to two decimal places as​ needed.)

left parenthesis b right parenthesis(b)

You would expect approximately

nothing

fish to be shorter than

66

inches.

​(Round to the nearest​ fish.)  

Answer 1

ANSWER:

mean=9 inch

standard deviation = 2 inch

(a)Approximately nothing % of fish are longer than 1313 inches.

  

  

  

Rounding off 0.02

Approximately 2% of fish are longer than 13 inches.

(b) expect approximately nothing fish to be shorter than 66 inches.

Now n=200

Now

You would expect approximately 13 fish to be shorter than 6 inches