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Multiple choice questions based on regression.
A regression and correlation analysis resulted in the following information regarding a
1. A regression and correlation analysis resulted in the following information regarding a dependent variable (y) and an independent variable (x).
∑X = 90 ∑(Y - )(X - ) = 466
∑Y = 170 ∑(X - )2 = 234
n = 10 ∑(Y - )2 = 1434
SSE = 505.98
The coefficient of determination equals
1. 0.6472 2. -0.6472 3. 0 4. 1
2. The following information regarding a dependent variable Y and an independent variable X is provided.
∑X = 16 ∑(Y - )(X - ) = -8
∑Y = 28 ∑(X - )2 = 8
n = 4 SST = 42
SSE = 34
The coefficient of determination is
1. 0.1905 2. -0.1905 3. 0.4364 4. -0.4364
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
What is the probability that the mean price for a sample of 30 service stations is within $.03 of the population mean (to 4 decimals)?
Randomly select a sample of five rental agencies. Start with row two and column two. The number is 90935. Use the first two numbers starting with 90.
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
Finding the probability selecting a defective item from a collection of items using tree diagram
Let S = {c, h, j, q, t, y} be a sample space of an experiment and let E = {c, h}, F = {c, q, y}, and G = {h, j, t} be events of this experiment. (Enter your answers using roster notation. Enter Ø for the empty set.)
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90.
You run a two tail t-test. The critical value for this test at the .05 level is a t of 7.82. What value must the obtained t-test statistic be in order to be considered significant at the .05 level?
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
Can we conclude that mean time for game is less than 3.50 hours? Use.05 significance level.
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