Sampling error refers to differences between statistics calculated from a sample and statistics pertaining to the population from which the sample is drawn.

Calculate the periodic interest rate of quarterly payments earning 4.5% compounded annually correct to five decimal places.

Fred borrowed money 18 months ago at 12% compounded semi-annually. He now owes a total of $5,450. How much of this is interest?

A) $874.07
B) $893.71
C) $767.67
D) $3,540.63
E) $1,041.04

The regression equation = 3,698 + 2,538X gives an R² value of 0.2645.This means that ________.

A) X and Y have a very high level of correlation
B) the percentage of variation in Y that is attributed to random factors is 26.45%
C) 26.45% of the variation in Y can be explained by X
D) a one-percent change in Y will lead to a 26.45% change in X

A $1,000 bond, with interest at 8 ½% on January 1 and July 1, was sold on September 4 at 103 plus accrued interest. Compute the dollar amount of the sale the seller received. (Assume a 360-day year and a commission of $5 per bond.)

The average length of time required to complete a college achievement test was found to equal 75 minutes, with a standard deviation of 15 minutes. When should the test be terminated if you wish to allow sufficient time for 90% of the students to complete the test? (Assume that the time required to complete the test is normally distributed.)
______________

{Silver Prices Narrative} Do these results allow us at the 5% significance level to conclude that the model is useful in predicting the price of silver?