Suppose the average price for new cars in 2012 has a mean of 30,100 and a standard deviation of 5,600. Based on this information, what interval of prices would we expect at least 89 of new car prices to fall within?
A) 24,500 to 35,700
B) 18,900 to 41,300
C) 13,300 to 46,900
D) 7,700 to 52,500
Q. 2The normal probability distribution can be used to approximate the ________ distribution when np 5 and nq 5.
A) exponential
B) Poisson
C) binomial
D) uniform
Q. 3Reducing without increasing the sample size will cause to increase.
Indicate whether the statement is true or false
Q. 4Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that exactly two customers will arrive during the next 15 minutes?
A) 0.0778
B) 0.1510
C) 0.2087
D) 0.4236
Q. 5All analysis of variance procedures require that the observations are dependent on one another.
Indicate whether the statement is true or false
Q. 6According to a recent survey, 70 of 18- to 34-year-olds do not keep a budget. A random sample of six 18- to 34-year-olds was selected. The probability that all six do not keep a budget is ________.
A) 0.078
B) 0.118
C) 0.240
D) 0.333
Q. 7The power curve plots the power values of a hypothesis test over a range of corresponding sample means.
Indicate whether the statement is true or false
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