A camera manufacturer just shipped a batch of 36 digital cameras to local retailers and seven of the cameras have a defective sensor. Cutler Electronics received eight of these digital cameras. What is the mean of this probability distribution?
A) 1.56
B) 1.95
C) 2.28
D) 2.71
Q. 2CoStar would like to test if the vacancy rate for warehouse stores is more than 8. A random sample of 85 warehouse stores was selected and the number of vacant stores was counted.
Assume that the true population proportion of vacant warehouse stores is 0.125. Using = 0.05, beta equals ________.A) 0.3627
B) 0.4091
C) 0.5557
D) 0.7188
Q. 3Analysis of variance compares the variance between samples to the variance within those samples to determine if means of populations are different.
Indicate whether the statement is true or false
Q. 4CoStar would like to test if the vacancy rate for warehouse stores is more than 8. A Type II error would occur if CoStar concludes that the vacancy rate was _______________________.
A) more than 8 when, in reality, the proportion was 8 or less
B) 8 or less when, in reality, the proportion was more than 8
C) equal to 8 when, in reality, the proportion was 8 or less
D) not equal to 8 when, in reality, the proportion was equal to 8
Q. 5DLP projectors are used in the majority of cinema projection systems and require a special light bulb to display a picture. Assume that the average life of a DLP bulb is 2,000 hours and that this failure time follows the exponential distribution.
What is the probability that a randomly selected bulb will last less than 1,800 hours?A) 0.3567
B) 0.4056
C) 0.5934
D) 0.7774
Q. 6Unlike the critical z-score and critical t-score, the critical F-score can only take on positive values.
Indicate whether the statement is true or false
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