Answer:
5%
Step-by-step explanation:
This is a significance test for a mean.
The 2 hypothesis here will be:
To determine the z-score of the error in the means you have to use this formula:
This mean that if the z score of a significance level is less than 1.897 the hypothesis that μ>2,200 is suggested.
10% -> z= 1.28
5% -> z = 1.645
1% -> z = 2.33
The most restrictive level of significance is 5%
Answer:
A
Step-by-step explanation:
When you simplify it becomes -2x-10 = -2x-10
Then when you solve there is a 0 infront of the x so it becomes 0x = 0
Answer:
x = -4 , x = -1
Explanation:
Multiply by x on both sides to get rid of fraction
x(x + 4/x) = x(-5)
x^2 + 4 = -5x
x^2 + 5x + 4 = 0
Factor
(x+4)(x+1) = 0
x = -4 , x = -1