Yes i did this before once and it is
Answer:
B is correct because there cannot be negative people in a cafeteria.
Step-by-step explanation:
1. To calculate the mean, we first total the number of hours: The 20 students' total number of study hours
is 118.5 hours.
2. We divide by the number of samples to find the mean: <span>The sample mean is 5.93.</span>
3. Next, we find the SD: <span>Calculate the standard deviation.</span>
4. Then we divide SD by the number of samples to get the standard error: the standard error of the mean of the sample is 0.45.
5. Since for a 95% CI, the corresponding z-score is 1.96 ~ 2, we use the formula for CI: mean +/- z*SE, which is: The range in which 95% of the sample
mean occurs is 5.93 + 2 × 0.45 = 6.83 hours and 5.93 − 2 × 0.45 = 5.03
hours.
6. Finally: The range in which
95% of the sample mean occurs is (5.03, 6.83).
Answer:
2/3
Step-by-step explanation:
1 1/6 - 1/2
Get a common denominator of 6
1 1/6 - 1/2*3/3
1 1/6 - 3/6
Borrow 1 from the 1 in the form of 6/6
6/6 + 1/6 - 3/6
7/6 - 3/6
4/6
Reduce by dividing the top and bottom by 2
2/3
X =13 because it’s a 45-45-90 triangle and the sides take the 13square root of 2 and take the 2 out and you get 13. Sorry for the weird explanation, hope you understood.
