Question

Suppose that a population parameter is 0.7 and many large samples are taken from the population. If the sample proportions are normally distributed, with 99.7% of the sample proportions falling between 0.655 and 0.745, what is the standard deviation of the sample proportions

Answer 1

this is the empirical rule essentially. you know that (0.655,0.745)=(.7+-3 sd). now solve for sd

Answer 2

i don't know how to do any of the problem

Answer 3

sd=.015

Answer 4

I just need the answer please

Answer 5

https://en.wikipedia.org/wiki/68%E2%80%9395%E2%80%9399.7_rule

Answer 6

so the answer is 0.025?

Answer 7

is the answer 0.025?

Answer 8

hello?