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In a regression model involving 30 observations, the following estimated regression equation was obtained:
= 17 + 4X1 - 3X2 + 8X3 + 8X4
For this model SSR = 700 and SSE = 100. The conclusion is that the
a. model is not significant
b. model is significant
c. slope of X1 is significant
d. slope of X2 is significant
determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre
For value 10,40,20,50 and 40, value of arithmetic mean is? Simplest measure of dispersion is the Standard deviation, variance, Quartile deviation.
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
Mean and standard deviation are 584.6 and 34.28
A researcher measures a response variable Y and explanatory variable X on each of several objects. A scatterplot of the measurements is as follows.
Using the confidence interval when conducting a two-tail test for the population mean we do not reject the null hypothesis if the hypothesized value for:
At the 0.05 level of significance, can we conclude Middletown students remained in their districts less time than Brockton students? Make use of 5-step hypothesis testing procedure.
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Find the probability that in a given month:
Iindicate all samples are approximately Normal with no outliers. Is the ANOVA appropriate?
Sampling variability refers to the idea that different samples will include different individuals
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
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