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
Answer:
I think its B i might be wrong
Step-by-step explanation:
This is impossible without getting a never ending decimal somewhere between 1.14 and 1.15.
Answer:
39°
sum of triangle's interior angles: 180°
180°-90°-51°=39°