The confidence interval extremities are given by the formula:
m +/- (z · σ / √n)
In your problem:
m = 3.13
<span> σ = 0.23
n = 36
The z-score for a 99% confidence interval is 2.576
Therefore:
</span>m - (z · σ / √n) = 3.13 - (2.576 · 0.23 / √36) = 3.031
<span>m + (z · σ / √n) = 3.13 + (2.576 · 0.23 / √36) = 3.229
Therefore, the confidence interval is (</span>3.031, <span>3.229).</span>
Answer:
To thirds if I'm not wrong
Step-by-step explanation:
three fourths meaning 3/4 of a number is 1/2
so:
3/4 of number is 1/2
1/4 of number = number ÷ 4
3/4 of number = (number ÷ 4) × 3
(number ÷ 4) × 3 = 1/2
<divide both sides by 3>
number ÷ 4 = 1/6
<multiply both sides by 4>
number = 4/6
<show in lowest term>
number = 2/3
the number is 2/3
D) 8.7lbs
Subtract $2.50 from the total cost, because that's a fixed number, then do more math and boom, just like magic, it's solved.
So when x = -1, you just substitute the variable x to -1.
"4x" means 4 times x, so when x is replaced to -1, that would be 4 times -1.
f(-1) = 4(-1) = -4
So the value of function at x = -1 would be -4.
Hope this helps.
Answer:
it is 60 i thim k think so
