Answer:
<em>H₀</em>: <em>μ</em>₁ - <em>μ</em>₂ = 0 vs. <em>Hₐ</em>: <em>μ</em>₁ - <em>μ</em>₂ > 0.
Step-by-step explanation:
A test is to be performed to determine whether the average sales are higher in stores where customers are approached by salespeople than in stores where they aren't.
A two-sample test can be used to determine whether there is a significant difference between the sales of the stores where the customers are approached by salespeople and the stores where the customers are not approached by salespeople.
We can either use the <em>z</em>-test or <em>t</em>-test. If the population standard deviation for the sales of the two stores are given then we will use the <em>z</em>-test. And if not then the <em>t</em>-test will be used.
1 : group of stores where customers are approached by salespeople
2 : group of stores where customers are not approached by salespeople
The hypothesis can be defined as follows:
<em>H₀</em>: There is no difference between the average sales of the two stores, i.e. <em>μ</em>₁ - <em>μ</em>₂ = 0.
<em>Hₐ</em>: The sales for the store 1 is higher than that for store 2, i.e. <em>μ</em>₁ - <em>μ</em>₂ > 0.
Answer:
if the slopes are the same then they are parralel not sure about perpendicular
The domain is the possible values of x.
There are no real values for ln 0 or ln of a negative number so the value of (1 - x) must be > 0
1 - x > 0
-x > -1
x < 1
Domain is x < 1 or in interval notation it is ( -∞, 1)
Answer:
k+15
Step-by-step explanation:
The word "increased" indicates that there will be addition and the word "product" indicates there will be multiplication. Since it's asking for the product of 5 and 3, we can solve by multiplying those two numbers to get 15. Our variable k will then add 15. So, the final answer we get is: k+15