Answer: ($3.532, $4.166)
Step-by-step explanation:
Given : Significance level : 
Critical value : 
Sample size : n= 157
Sample mean : 
Standard deviation : 
The confidence interval for population mean is given by :_


Hence, the 0% confidence interval for the average tip given at this restaurant = ($3.532, $4.166)
Answer: It will be (2,-5) and (6,3) because they are one the slope line
Step-by-step explanation:
Hope is Helped
A) 31.110
B) 0.110
When rounding to three decimal places, you consider if the number to the right of the third decimal place is less than or greater than 5. If it's less than 5, then the digit in the third decimal place stays the same. If it is greater than or equal to 5, then you round the digit in the third decimal place up by one.
Answer:
1 is 4
2 is 3
3 is 6
Step-by-step explanation:
tofu tu ugh uh runs
Answer:
1 haircut = 47 dollars
1 colouring = 98 dollars
Step-by-step explanation:
Let
be equal to the cost of 1 haircut.
Let
be equal to the cost of 1 colouring treatment.
<u>1) Form equations</u>
Equation 1: 3 haircuts + 1 colour = 239 dollars
⇒ 
Equation 2: 2 haircuts + 1 colour = 192 dollars
⇒ 
<u>2) Solve the system of equations</u>
Subtract equation 2 from equation 1 to cancel out y (elimination)
-
⇒ 
Therefore, Natalie charges 47 dollars for 1 haircut.
Plug x back into one of the equations to solve for y

Subtract both sides by 94

Therefore, Natalie charges 98 dollars for 1 colouring treatment.
I hope this helps!