Answer:
<h2>
11.2≤
12.8 </h2>
Step-by-step explanation:
Confidence interval for the population mean is expressed by the formula;
CI = xbar ± Z(S/√n) where;
xbar is the sample mean = 12.5
Z is the z score at 99% confidence = 2.576
S is the standard deviation = √variance
S = √2.4 = 1.5492
n is the sample size = 25
Substituting the given values into the formula given above,
CI = 12.5 ± 2.576(1.5492/√25)
CI = 12.5 ± 2.576(0.30984)
CI = 12.5 ± 0.7981
CI = (12.5-0.7981, 12.5+0.7981)
CI = (11.2019, 12.7981)
Hence the 99% confidence interval for the population mean is 11.2≤12.8 (to 1 decimal place)
.108 I hope that this helps
Answer:
The slope is -1
Y-intercept is (0, -6)
Equation is y = -1x - 6 or y = -x - 6 either is right
Step-by-step explanation:
We already know that the slope is negative because the line is pointed this way \ pointed up to the left.
You have to do rise/run to find the slope.
The rise is 6 and the run is 6
6/6 = 1 since the line is negative the slope is -1x or -x
The y intercept is -6
Use the point (-2, -4)
Plug in
-4 = -(-2) + b
-4 = 2 + b (subtract 2 on both sides)
-6 = b
y = -x - 6
Hope this helps ya!!
Answer:
81/42
Step-by-step explanation:
8 1/10 ÷ 4 1/5
81/10 ÷ 21/5
81/10 * 5/21
(81*5)/(10*21)
405/210
81/42
Answer:
$4.82
Step-by-step explanation:
30% of 15 = 4.5
7% of 4.5 = 0.315
4.5+0.315 = $4.815 approx $4.82
Please mark me brainliest
