Answer: D. (4,4)
Step-by-step explanation:
1. You have the following expression:
3. To find the point that satifies the expression shown above, you only need to substitute each one of them into the expression, as you can see below:
A. (This is not true)
B. (This is not true)
C. (This is not true)
D. (This is true)
4. Therefore, the correct answer is the option D, which is: (4,4)
Answer:
The average weekly grocery bill per four-person family in the town is significantly different from the national average.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = $100
Sample mean, = $103.23
Sample size, n = 25
Alpha, α = 0.05
Sample standard deviation, s = $8.82
First, we design the null and the alternate hypothesis
We use Two-tailed t test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We accept the null hypothesis.
We accept the null hypothesis and determine that the average weekly grocery bill per four-person family in the town is significantly same to the national average.