Answer:
A . About 95% of all random samples of 50 students from this population would result in a 95% confidence interval that covered the population mean number of hours of sleep per day.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
95% CI from a sample of 50 students is (6.73, 7.67).
This means that we are 95% sure that the population mean is in this interval, that is, about 95% samples of 50 would contain the population mean, which is given by option A.
Answer:
A. 56 52 feet
Step-by-step explanation:
Answer:
62°
Step-by-step explanation:
m <em>L</em><em> </em>6 = m <em>L</em><em> </em>8 (same facing of) = 62°
Answer:
-2497
Step-by-step explanation:
We are given an arithmetic series with the following terms:
First term, 
= -40
Common difference, d = -7
Number of terms, n = 22
To find out: Sum of n terms, where n is 22
We know that Sum of n terms in an arithmetic series is given as:
Putting the values in the formula:
So, the sum of 22 terms is <em>-2497</em>.
9514 1404 393
Answer:
slope: 0.10
Step-by-step explanation:
The independent variable is the number of texts, so that goes in the denominator of the slope ratio.
slope = (change in cost)/(change in texts)
= ($30 -25)/(100 -50)
= $5.00/50
slope = $0.10 per text
