Mathematics, 18.03.2021 22:50 cocaineal
Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.
A survey was given to a random sample of 400 people living in a certain community. The people were asked whether they supported the construction of walking trails in the community park. The results are shown in the following table.
Response Frequency
Yes, support 210
No, do not support 90
No opinion 100
Total 400
(a) Complete the following segmented bar chart to show the relative frequencies of the results.
A follow-up study will be conducted with a sample of 20 people from the 300 people who responded yes (support) and no (do not support). Two sampling methods have been proposed: a simple random sample and a stratified random sample with the survey response as strata.
(b) If the stratified random sample is used, what is the number of people that will be selected from those who responded yes? Support your answer by showing your work
c) Describe a statistical advantage of using the stratified random sample instead of the simple random sample for the follow-up study.
Answers: 3
Mathematics, 21.06.2019 17:00
Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?
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Mathematics, 21.06.2019 20:30
If mâ abc = 70°, what is mâ abd? justify your reasoning. using the addition property of equality, 40 + 70 = 110, so mâ abd = 110°. using the subtraction property of equality, 70 â 30 = 40, so mâ abd = 30°. using the angle addition postulate, 40 + mâ abd = 70. so, mâ abd = 30° using the subtraction property of equality. using the angle addition postulate, 40 + 70 = mâ abd. so, mâ abd = 110° using the addition property of equality.
Answers: 2
Mathematics, 21.06.2019 21:30
Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.
Answers: 1
Show all your work. Indicate clearly the methods you use, because you will be scored on the correctn...
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