Answer:
a) The estimated standard deviation of the sampling distribution of the proportion is 0.023
b) the estimated standard deviation have been if he had surveyed only 100 customers is 0.046
Step-by-step explanation:
given information:
the number of sample, n = 400
sample proportion, p = 70% = 0.7
a) standard deviation of a sample proportion is
σ = 
= 
= 0.023
b) if n = 100, so
σ = 
= 
= 0.046
The answer is 3 cm.
Circle A's diameter is 27, right? However, circle A is 3 times the value of the area of B. Because of that, you need to do 27/3, the inverse, in order to get the diameter of circle B.
Next, because radius is half of the diameter, you do 9 divided by 3 or 9 times 1/2.
Answer:
m=.5
Step-by-step explanation:
Just saying you have a 25% chance of getting it right if you guess
Answer:

Step-by-step explanation:
