Answer:
The confidence interval is from 69.82 o 82.18
Step-by-step explanation:
Using this formula X ± Z (s/√n)
Where
X = 76 --------------------------Mean
S = Standard Deviation
If Variance = 144
S = √144
S = 12
n = 25 ----------------------------------Number of observation
Z = 2.576 ------------------------------The chosen Z-value from the confidence table below
Confidence Interval || Z
80%. || 1.282
85% || 1.440
90%. || 1.645
95%. || 1.960
99%. || 2.576
99.5%. || 2.807
99.9%. || 3.291
Substituting these values in the formula
Confidence Interval (CI) = 76 ± 2.576 (12/√25)
CI = 76 ± 2.576(12/5)
CI = 76 ± 2.576(2.4)
CI = 76 ± 6.1824
CI = 76 + 6.1824 ~ 76 - 6.1824
CI = 82.1824 ~ 69.8176
CI = 82.18 ~ 69.82
In other words the confidence interval is from 69.8176 to 82.1824
Answer:
this question > any other question
Step-by-step explanation:
Answer:
<em><u>7</u></em>
Step-by-step explanation:
(-√7)(-√7)
<em><u>7</u></em>
<em><u /></em>
<em><u>Please Mark As Brainliest</u></em>
Problem 1 should be B, C, and D. I'm not sure about the rest... Sorry I couldn't be more of a help.
Let's turn this english into numbers:
<span>The time it takes Tomás to bike to the community center is 2 minutes less than half the time it takes him to bike to the city park.
Since </span>p = the time it takes Tomás to bike to the park, and it takes18 minutes to bike to the community center, the sentence turns into:
18 = 2 minutes less than half p
18 = 2 minutes less than 1/2p
18 = 1/2p-2
<span>D.1/2p–2=18
</span>
