A normally distributed population has a mean of 500 and a standard deviation of 60. Determine the probability that a random sample of size 16 selected from this population will have a sample mean less than 475.
A) 0.3251
B) 0.7124
C) 0.0475
D) 0.0712
Q. 2The number of cells in a two-factor analysis of variance design is equal to the number of levels of factor A plus the number of levels of factor B.
Indicate whether the statement is true or false
Q. 3A two-tailed hypothesis test is used when the null hypothesis looks like the following: H0 : = 100.
Indicate whether the statement is true or false
Q. 4In order to analyze any potential interactions between factors in an analysis of variance study, it is necessary to have at least two measurements at each level of each factor.
Indicate whether the statement is true or false
Q. 5Suppose that a population is known to be normally distributed with mean = 2,000 and standard deviation = 230. If a random sample of size n = 8 is selected, calculate the probability that the sample mean will exceed 2,100.
A) 0.2141
B) 0.1871
C) 0.0712
D) 0.1093
Q. 6The Nationwide Motel Company has determined that 70 percent of all calls for motel reservations request nonsmoking rooms. Recently, the customer service manager for the company randomly selected 25 calls.
Assuming that the distribution of calls requesting nonsmoking rooms is described by a binomial distribution, the expected number of requests for nonsmoking rooms is 14. Indicate whether the statement is true or false
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