Mathematics, 16.04.2020 02:25, cam6836
Weight gain during pregnancy. In 2004, the state of North Carolina released to the public a large data set containing information on births recorded in this state. This data set has been of interest to medical researchers who are studying the relationship between habits and practices of expectant mothers and the birth of their children. The following histograms show the distributions of weight gain during pregnancy by 840 younger moms (less than 35 years old) and 132 mature moms (35 years old and over) who have been randomly sampled from this large data set. The average weight gain of younger moms is 30.7 pounds, with a standard deviation of 14.91 pounds, and the average weight gain of mature moms is 29.15 pounds, with a standard deviation of 13.46 pounds. Do these data provide strong evidence that there is a significant difference between the two population means? Conduct a hypothesis test. Round all numeric answers to 4 decimal places.1. Which set of hypotheses should the researcher use?
A. H0H0: p1−p2=0p1−p2=0, HAHA: p1−p2<0p1−p2<0
B. H0H0: μ1−μ2=0μ1−μ2=0, HAHA: μ1−μ2≠0μ1−μ2≠0
C. H0H0: p1−p2=0p1−p2=0, HAHA: p1−p2≠0p1−p2≠0
D. H0H0: μ1−μ2=0μ1−μ2=0, HAHA: μ1−μ2>0μ1−μ2>0
2. Calculate the test statistic. ? z t X^2 F =
3. Calculate the p-value for this hypothesis test.
p value =
4. What is your conclusion using αα = 0.01?
A. Do not reject H0H0
B. Reject H0H0
Answers: 3
Mathematics, 21.06.2019 14:00, fahaddakhil3186
Question 1(multiple choice worth 1 points)(07.06 mc)a group of students must collect at least $150 to organize a science fair. they have already collected $30. which graph best represents all remaining amounts of money, in dollars, that thestudents should still collect to organize the science fair? -210 -180 -150 - 120 -90-60 -300306090 120 150 180 210-210 -180 -150 - 120 -90 -60 -30 0 30 60 90 120 150 180 210-210 -180-150 - 120 -90-60-300 30 60 90 120 150 180 210-210 -180 -150 - 120.90 -60 -30 0 30 60 90 120 150 180 210
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Mathematics, 21.06.2019 21:00, jonquil201
These box plots show the number of electoral votes one by democratic and republican presidential candidates for the elections from 1984 through 2012. which statement best compares the spread of the data sets
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