Answer:
Step-by-step explanation:
The total cost of the bench would be $72 after the markdown being 10% from the orginal proce which was $80.
a. The standard error is equal to the standard deviation divided by the square root of the sample size:
SE = (23 ppm)/√18 ≈ 5.42 ppm
b. The t statistic is given by the difference between the true and sample means, divided by the standard error:
t = (192 ppm - 180 ppm)/SE ≈ 2.21
c. The p-value is approximately 0.0204.
d. Since p < 0.05, the difference is significantly different, so we reject the null hypothesis.
e. A type I error might have occurred, since it's possible that the null hypothesis was true, but we ended up rejecting it.
Try adding the two and think of it mentally as if you were drinking the amount of cups of water that's what I do when I have questions like these :))
Answer:
x > -4
Interval notation is (-4,∞)
Step-by-step explanation:
We need to get x alone
To get x alone , we need to remove -1/2 from left hand side
To remove denominator 2 we multiply both sides by 2
-1x> 4
To remove -1 , divide both side by -1
When we divide or multiply by negative then reverse the inequality symbol
x > -4
Interval notation is (-4,∞)
