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Indicate whether the following statement is true or false
a) If the hypothesis Hsub0:Betasub1=0 is rejected,then it can be safely concluded that x causes y.
b)Suppose a regression of y on x is run and the t statstic for testing Hsub0: Betasub1=0 versus Hsuba:Betasub1 not equal to 0
has a p value of 0.0295 assosiated with it. Using a 5% level of significance, the null hypothesis should be rejected.
c)If the correlation between y and x is 0.9, then the R^2 value for a regression of y on x is 90%.
d)As long as the R^2 value is high for an estimated regression equation , it is safe to use the equation to predict for any value of x.
e)If the R^2 value for regression of y on x is 75%. then the R^2 value for a regression of x on y is also 75%.
what is the distribution of the case described here? mrs. shop wants to buy three high quality fountain pens at a
It is approximately 300 miles from Chicago, Illinois, to St. Louis, Missouri. allowing for various traffic conditions, a driver can average approximately 60 miles per hour.
Borst et.al. investigated the relation of ego development, age, gender, and diagnosis to suicidality among adolescent psychiatric inpatients.
For each of the following, indicate whether or not you would expect it to have a strong seasonal component and why.
Fifty samples of size 600 were drawn from a manufacturing process and the number of defectives in each sample was counted.
The number of shark attacks per year in the US is distributed approximately normal, with a Variance of 31.8 and a standard deviation of 10.
you take a sample of 22 from a population of test scores and the mean of your sample is 60. a you know the standard
find a formula for the probability distribution of the random variable x representing the outcome when a single die is
Gender differences in dream content are well documented (Winget & kramer, 1979). Suppose a researcher studies aggression content in the dreams of men and women.
in a normal distribution of scores four participants obtained the following deviation scores 1 - 2 5 and - 10.a which
Problems on Sampling Variability and Standard Error and Confidence Intervals
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
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