R = d/2 = 10
common area = (2/3)πr^2 - (rt(3)/2)r^2
Answer:
96
Step-by-step explanation:
<u>Step 1
</u>
Divide your confidence interval by 2. In this case the confidence is 95% = 0.095, so 0.095/2 = 0.0475
<u>Step 2
</u>
Use either a z-score table or a computer to find the closest z-score for 0.0475 and you will find this value is 1.96
<u>Step 3
</u>
Divide the margin error by 2. In this case, the margin error is 2%. When dividing this figure by 2, we get 1% = 0.01
<u>Step 4
</u>
Divide the number obtained in Step 2 by the number obtained in Step 3 and square it
1.96/0.01 = 196 and 196 squared is 38,416
<u>Step 5
</u>
As we do not now a proportion of people that purchase on line, we must assume this value is 50% = 0.5. Square this number and you get 0.25
<u>Step 6
</u>
Multiply the number obtained in Step 5 by the number obtained in Step 4, round it to the nearest integer and this is an appropriate size of the sample.
38,416*0.25 = 9,604
Answer: aWX+bºx=abvX
o maXmy
Wi-m/xy
Step-by-step explanation:
M - {n [p - (mn - p)]} = m - {n [p - mn + p]} = m - {n [2p - mn]} = m - {2np - mn^2} = m - 2np + mn^2
Answer:
She used 5.7 pounds
Step-by-step explanation:
Asked how much she used during summer so i think we subtract 20 out of 14.3 which gives us 5.7
