Answer:
The 98% confidence interval for the mean number of hours of study time per week for all students is (20.9, 25.1).
Step-by-step explanation:
Confidence interval:
Sample mean plus/minus the margin of error.
In this question:
Mean of 23.
Margin of error 2.1.
Then
23 - 2.1 = 20.9
23 + 2.1 = 25.1
The 98% confidence interval for the mean number of hours of study time per week for all students is (20.9, 25.1).
A pair of scissors is a classic example of Linear pair of angles.
Answer:
The first and third options.
Explanation:
Look at each column and add the number of families.
9.50/1 = x/6.2
(Cross multiply)
9.50*6.2 = 1x
58.9 = x
She will earn $58.90 if she works for 6 hours and 12 minutes
Question 5: True
Question 6: False
Question 7: 23.32
Question 8: 6.73
