Mathematics, 25.03.2021 05:30 eboniwiley
A teacher interested in determining the effect of a new computer program on learning to read conducted a study. One hundred students were randomly assigned to one of two groups. The first group used the computer program while the
second group did not. Both groups were tested to determine how much their reading levels improved. The results for the two groups were compared. What kind of study is this? (2 points)
This is an experiment because a treatment was applied to a group
This is an experiment because students were able to choose which group to join
This is a survey because students were randomly assigned to groups
This is a survey because a treatment was applied to both groups
Answers: 2
Mathematics, 21.06.2019 17:00
The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)
Answers: 1
Mathematics, 21.06.2019 17:40
The weight of fullβgrown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?
Answers: 2
Mathematics, 21.06.2019 23:20
Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g
Answers: 1
A teacher interested in determining the effect of a new computer program on learning to read conduct...
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