You take a simple random sample of 100 adults from a town in the Western United States to determine the proportion of those in town who invest in the stock market. Assume the unknown population proportion or percentage of people in town who invest in the stock market is p = 0.30 (or 30%).

1. What is the mean of the distribution of the sample proportions?

a. 30
b. 70
c. 0.70
d. 0.30

2. What is the standard deviation of the distribution of the sample proportions?

a. 0.004
b. 0.046
c. 0.458
d. 4.583

3. What is the probability that your random sample of 100 adults will have a sample proportion less that 0.25?

a. 0.138
b. 0.124
c. 0.876
d. 0.862

step-by-step explanation:

5×5×5+2(8)÷2(2)+3(3)

15+16÷4+9

31÷13

do 31÷13 and u will get ur answer

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

i don't know, but that looks pretty bad. my school passed us unless we failed in all the subjects, but idk abt ur school's rules.

copyright potato 2019.

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.