The 99% Confidence interval for the mean sale time for all homes in the neighborhood is:87.857, 112.143.
<h3>Confidence interval</h3>
a. The assumption is: Assume that the population has a normal distribution.
The CI is exact for the normal populations and for small samples the z-interval method should be used in a situation where the variable is normally distributed.
b. Confidence interval:
CI=Sample mean±z-score×Standard deviation/√Size of the sample
CI=100-2.576×20/√18, 100+2.576×20/√18
CI=100-12.143, 100+12.143
CI=87.857, 112.143
Therefore the 99% Confidence interval is 87.857, 112.143.
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Answer:
x = 1.5
y = 0.5
Step-by-step explanation:
y = −x + 2
y = 3x − 4
so
-x + 2 = 3x -4
2 + 4 = 3x + x
4x = 6
x = 1.5
then y = -x + 2 = -1.5 + 2 = 0.5
$90
because if 1 body equals 30 each and she has 3 body’s add 30 3 times 30+30=60+30=90
Answer:
0.925m
Step-by-step explanation:
1.85m*12 = 22.2m used
2/3 = 22.2m <----- for gifts
3/3 = 33.3m <----- overall length of ribbons
33.3m - 22.2m = 11.1m
11.1m/12 = 0.925m
