Answer:
D. 2 1/4
Step-by-step explanation:
8 7/4 - 7
9 3/4 - 7
2 1/4
Answer:
y = 5/2x + 6
Step-by-step explanation:
Find the slope:

Use point-slope form to find the equation in slope-intercept form:

Answer: (30.49 years, 42.31 years)
Step-by-step explanation:
The formula to find the confidence interval is given by :-

, where
= Sample mean
z* = Critical value.
= Population standard deviation.
n= Sample size.
As per given , we have
n= 40
We know that the critical value for 99% confidence interval : z* = 2.576 (By z-table)
A 99 percent confidence interval for µ, the true mean age of guests will be :

∴ a 99 percent confidence interval for µ, the true mean age of guests = (30.49 years, 42.31 years)