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1) What measurements assesses the amount of variance of change in the dependent variable reflected by changes in the independent variable?
a) Coefficient of determination ( R- squared),
b) Coefficient of least squares,
c) Coefficient of alineation,
d) correlation coefficient (r),
2) The range of a sample of 10 values is 5 and the largest observation is 50 . The lowest value is:
a) 40
b) 45,
c) 55,
d) cannot be computed from the data given
Out of the 109 males, 42% preferred Pepsi and out of the 53 females, 40% preferred Pepsi. Pepsi wanted to test to determine if the males preferred Pepsi more than females.
Solve the equations using linear algebra
Describe expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000?
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
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Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wants to determine if the average price of imported wine is less than the average price of domestic wine.
An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. the individuals in experiment were grade 12 math students from one particular high school.
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