Two events are __________________ if the occurrence if the occurrence of event E in a probability experiment does not affect the probability of event F in the same experiment.
A) independent B) mutually exclusive C) dependent D) disjoint
Q. 2It is desired to test H0: = 12 against H1: 12 using = 0.05. The population in question is uniformly distributed with a standard deviation of 2.0.
A random sample of 100 will be drawn from this population. If
is really equal to 11.9, what is the value of associated with this test?
A) 0.0790 B) 0.9210 C) 0.4210 D) 0.0395
Q. 3Many people think that a national lobbys successful fight against gun control legislation is reflecting the will of a minority of Americans. A random sample of 4000 citizens yielded 2130 who are in favor of gun control legislation.
Find the point estimate for estimating the proportion of all Americans who are in favor of gun control legislation. A) 0.5325 B) 2130 C) 4000 D) 0.4675
Q. 4After completing an inventory of three warehouses, a golf club shaft manufacturer described its stock of 12, 246 shafts with percentages given in the table. Is the event of selecting a shaft independent of the warehouse? Answer Yes or No.
A) No B) Yes
Q. 5A marketing research company needs to estimate which of two medical plans its employees prefer. A random sample of n employees produced the following 98 confidence interval for the proportion of employees who prefer plan A: (0.241, 0.561).
Identify the point estimate for estimating the true proportion of employees who prefer that plan. A) 0.401 B) 0.16 C) 0.241 D) 0.561
Q. 6It is desired to test H0: = 40 against H1: < 40 using = 0.10. The population in question is uniformly distributed with a standard deviation of 10.
A random sample of 36 will be drawn from this population. If is
really equal to 35, what is the probability that the hypothesis test would lead the investigator to commit a Type
II error?
A) 0.0427 B) 0.9573 C) 0.4573 D) 0.0854
Q. 7The city council of a small town needs to determine if the towns residents will support the building of a new library. The council decides to conduct a survey of a sample of the towns residents.
Which one of the following procedures would be most appropriate for obtaining a sample of the towns residents? A) Survey a random sample of persons within each neighborhood of the town.
B) Survey a random sample of librarians who live in the town.
C) Survey 500 individuals who are randomly selected from a list of all people living in the state in which the
town is located.
D) Survey every 7th person who enters the old library on a given day.
Q. 8The probability that a football game will go into overtime is 15. In 260 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime?
A) mean: 39; standard deviation: 5.75760367 B) mean: 39; standard deviation: 6.244998
C) mean: 36.4; standard deviation: 5.75760367 D) mean: 36.4; standard deviation: 6.244998
Q. 9The government of a town needs to determine if the citys residents will support the construction of a new town hall. The government decides to conduct a survey of a sample of the citys residents.
Which one of the following procedures would be most appropriate for obtaining a sample of the towns residents? A) Survey a random sample of persons within each geographic region of the city.
B) Survey a random sample of employees at the old city hall.
C) Survey every 7th person who walks into city hall on a given day.
D) Survey the first 300 people listed in the towns telephone directory.
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