The logic behind the F-test for testing whether two populations have equal variances is to determine ...

The logic behind the F-test for testing whether two populations have equal variances is to determine whether sample variances computed from random samples selected from the two populations differ due to sampling error, or whether the difference is
 
  more than can be attributed to sampling error alone, in which case, we conclude that the populations have different variances. Indicate whether the statement is true or false

Q. 2

When developing a scatter diagram, it is appropriate to connect the points on the graph with straight lines or the lines can be omitted.
 
  Indicate whether the statement is true or false

Q. 3

Compare and contrast the situations of data hugging the center line of a control chart and data hugging the control limits.
 
  What will be an ideal response?

Q. 4

Ponderosa Paint and Glass carries three brands of paint. A customer wants to buy another gallon of paint to match paint she purchased at the store previously.
 
  She can't recall the brand name and does not wish to return home to find the old can of paint. So she selects two of the three brands of paint at random and buys them.
 
  What is the probability that she matched the paint brand?
  A) 3/2
  B) 2/3
  C) 1/9
  D) 3/4

Q. 5

A study at State University involved an analysis of students' GPAs and the number of hours that they work at jobs off-campus. An appropriate graph to display the relationship between these two variables might be a scatter diagram.
 
  Indicate whether the statement is true or false

Q. 6

The population of incomes in a particular community is thought to be highly right-skewed with a mean equal to 36,789 and a standard deviation equal to 2,490.
 
  Based on this, if a sample of size n = 36 is selected, the sampling distribution would have a mean equal to the population mean, but the standard deviation of the sampling distribution will be one-sixth of the population standard deviation. Indicate whether the statement is true or false

Q. 7

In a two-tailed hypothesis test involving two population variances, if the null hypothesis is true then the F-test statistic should be approximately equal to 1.0.
 
  Indicate whether the statement is true or false