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A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
Pretest:77 79 81 88 67 90 73 82 85 76 71 70
Posttest:80 81 87 89 72 95 77 88 83 79 72 75
Construct a frequency distribution (class, tally and frequency) for the data set using the indicated number of classes. In the table, include the midpoint, relative frequencies and cumulative frequencies.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
Make a scatter plot of Y and X1 using Word. To do this click on insert and then chart. Click on X Y (Scatter). Enter the data from the table.
Test the claim that the actual percentage is 53%. Use a 0.10 significance level.
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
Determine the following areas under standard Normal distribution curve.
At.05 level of significance can director conclude that there is difference in the number of circuit cards bought by month?
The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes.
Each year the local country club sponsors a tennis tournament. Play starts with 128 participants. During each round, half of the players are eliminated.
Carry out suitable multiple comparison procedure to determine the source of the difference.
Suppose B^0 and B^1(beta hut 0 and beta hut 1) are the least squares estimates of B0 and B1 of the first model. Find the estimates of B0* and B1* in terms of B^0 and B^1.
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