A random variable, x, has a normal distribution with = 13.6 and = 2.90. Determine a value, x0, so that P(x x0 ) = 0.975.
A) 16.678
B) 19.284
C) 23.360
D) 14.475
Q. 2A process is considered out of control when ________.
A) special causes of variation are present
B) common causes of variation are present
C) process attributes are present
D) process variables are present
Q. 3There have been complaints recently from homeowners in the north end claiming that their homes have been assessed at values that are too high compared with other parts of town.
They say that the mean increase from last year to this year has been higher in their part of town than elsewhere. To test this, the assessor's office staff plans to select a random sample of north end properties (group 1 ) and a random sample of properties from other areas within the city (group 2 ) and perform a hypothesis test. Based on the information provided, the research (or alternate) hypothesis is:A) 1 = 2
B) 1 2
C) 1 > 2
D) 1 < 2
Q. 4If we are to use Solver to determine where the new plant has to be built, what is the amount shipped from Ohio to Los Angeles?
A) 0 units
B) 400 units
C) 1,000 units
D) 3,000 units
Q. 5Suppose a coin is flipped twice. The event of getting heads on the first toss and the event of getting heads on the second toss could be said to be mutually exclusive.
Indicate whether the statement is true or false
Q. 6The manager of the local county fair believes that no more than 30 percent of the adults in the county would object to a fee increase to attend the fair if it meant that better entertainment could be secured.
To estimate the true proportion, he has selected a random sample of 200 adults. The manager will use a 90 percent confidence level. Assuming his assumption about the 30 percent holds, the margin of error for the estimate will be approximately .169. Indicate whether the statement is true or false
Quick Reply
