According to a survey, 50% of americans were in 2005 satisfied with their job. assume that the result is true for the current proportion of americans. a. find the mean and standard deviation of the proportion for a sample of1000.

Step-by-step explanation:

The probability distribution of sampling distribution is known as it sampling distribution.

The mean and standard deviation of the proportion is given by :-

, where p =population proportion and  n= sample size.

Given : According to a survey, 50% of Americans were in 2005 satisfied with their job.

i.e. p = 50%=0.50

Now, for sample size n= 1000 , the mean and standard deviation of the proportion will be :-

Hence, the mean and standard deviation of the proportion for a sample of 1000:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi