The business college computing center wants to determine the proportion of business students who ...

The business college computing center wants to determine the proportion of business students who have personal computers (PCs) at home. If the proportion differs from 35, then the lab will modify a proposed enlargement of its facilities.
 
  Suppose a hypothesis test is conducted and the test statistic is 2.6. Find the P-value for a two-tailed test of hypothesis. A) 0.0094 B) 0.0047 C) 0.4906 D) 0.4953

Q. 2

The coefficient of determination is the of the linear correlation coefficient.
 
  A) square B) square root C) opposite D) reciprocal

Q. 3

To assess attitudes towards issues that affect the residents of a village, the village randomly chose 800 families to participate in a survey of life attitudes. The village received 628 completed surveys.
 
  What is the sample proportion of completed surveys? A) 0.785 B) 0.628 C) 1.274 D) 0.886

Q. 4

According to government data, the probability that an adult was never in a museum is 15. In a random survey of 10 adults, what is the probability that two or fewer were never in a museum?
 
  A) 0.820 B) 0.002 C) 0.800 D) 0.200

Q. 5

The business college computing center wants to determine the proportion of business students who have personal computers (PCs) at home. If the proportion exceeds 35, then the lab will scale back a proposed enlargement of its facilities.
 
  Suppose 300 business students were randomly sampled and 85 have PCs at home. Find the rejection region for this test using  = 0.10. A) Reject H0 if z > 1.28. B) Reject H0 if z < -1.28.
  C) Reject H0 if z > 1.645 or z < -1.645. D) Reject H0 if z = 1.28.

Q. 6

If the coefficient of determination is close to 1, then
 
  A) the least squares regression line equation explains most of the variation in the response variable.
  B) the least squares regression line equation has no explanatory value.
  C) the sum of the square residuals is large compared to the total variation.
  D) the linear correlation coefficient is close to zero.

Q. 7

A recent survey found that 70 of all adults over 50 wear sunglasses for driving. In a random sample of 10 adults over 50, what is the probability that at least six wear sunglasses?
 
  A) 0.850 B) 0.700 C) 0.200 D) 0.006

Q. 8

Professor Whata Guy surveyed a random sample of 420 statistics students. One of the questions was Will you take another mathematics class? The results showed that 252 of the students said yes.
 
  What is the sample proportion, pof students who say they will take another math class? A) 0.6 B) 0.42 C) 0.252 D) 0.775