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help plz? 2 questions
1. What does it mean to calculate frequencies within a dataset? to count the number of times a dataset is used by a student to calculate the product of two variables to make a third variable to count the number of cases that fall

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If the correlation coefficient is 0.790, what is the explained variation? A. 37.6% B. 62.4% C. 79% D. 21%

POLYNOMIALS
The cubic polynomial f(x) is such that the coefficient of x^3 is 1. and the roots of the equation f(x) = 0 are 1, 2 and k. Given that f(x)has a remainder of 8 when divided by (x3), find the value of k. okay, this is what i did:

physics
A 28.0 block is connected to an empty 2.20 bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.44 and the coefficient of kinetic friction between the table

Help?
1. What does it mean to calculate frequencies within a dataset? to count the number of times a dataset is used by a student to calculate the product of two variables to make a third variable to count the number of cases that fall

Statistics
The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X. True  If you were to find the correlation coefficient with a given data set for x and y, it would have the same correlation

stats
The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient of variation equals: a.0.1125% b.11.25%

STATISTICS
A) If a regression experiment has correlation coefficient r= 0.75, what precent of total variation is explained by the regression? B) if 85% of total variation is explained by the regression, and there is an inverse relationship

statistics
Pre study scores versus poststudy scores for a class of 120 college freshman english students were considerated. The residual plot for the least squares regression line showed no pattern. The least square regression line was y =

Chemistry
Using the set of smallest possible integer coefficients to balance the redox equation H2O2 +MnO−4 > O2 +Mn+2 (acidic solution), the coefficient for H2O2 is 1. 5. 2. The correct coefficient is not given. 3. 2. 4. 7. 5. 4.

chemistry
The redox reaction below occurs in acidic solution. Balance it with the smallest whole number coefficients and determine the coefficient for H2O. Zn(s) + NO3(aq) > Zn2+(aq) + N2O(g) i got 4 as the coefficient for water, but

physics
A body whose weight is W1=75N is tied to another body whose weight is W2=45N .If the coefficient of kinetic friction between W1 and the inclined plane (25°)AB is 0.15,calculate the coefficient of kinetic between W2 and the
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