The coefficient of determination cannot be negative. (True or false?)

The coefficient of determination cannot be negative.
 
  Indicate whether the statement is true or false

Q. 2

In examining the invoices issued by a company, an auditor finds that the dollar amounts of invoices have a mean of 1,732 and a standard deviation of 298.
 
  What is the probability that for a sample of 45 invoices, the average invoice is greater than 1,800?A) 0.563
  B) 0.063
  C) 0.437
  D) 0.937

Q. 3

Express the event A  B in words
 
  What will be an ideal response?

Q. 4

According to the empirical rule, you expect 95 of the measurements to lie within the interval 71.60, 99.48 whereas all the given measurements actually lie within this interval.
 
  Do your expectations agree with the provided data? If not, what conclusion can be drawn?

Q. 5

The probability is 70 that a randomly-selected light bulb will last at least how long.
 
  What will be an ideal response?

Q. 6

Based on the 95 confidence interval for the difference between the two population proportions, is there evidence that the population proportions are different?
 
  What will be an ideal response?