According to the National Health Interview Survey, 4.7 of U.S. adults 50 and older have had a total knee replacement. A random sample of 20 adults 50 and older has been selected.
Use the Poisson distribution to approximate the binomial distribution to determine the probability that no adults from this sample have had a total knee replacement.A) 0.1004
B) 0.1726
C) 0.2365
D) 0.3906
Q. 2Entertainment Software Association would like to test if the average age of gamers (those that routinely play video games) is more than 30 years old.
The correct hypothesis statement for Entertainment Software Association would be _____________________.A)
B)
C)
D)
Q. 3Costco sells a matching set of T-shirts and shorts. The T-shirt comes in four colors and six sizes. The shorts come in three colors and five sizes. The number of unique color and size combinations of T-shirts and shorts is ________.
A) 360
B) 425
C) 500
D) 625
Q. 4The degrees of freedom for the total sum of squares for one-way ANOVA equal the total number of observations minus two.
Indicate whether the statement is true or false
Q. 5Craftsman sells 10-digit keypads that are installed on homes to open the garage door. The consumer chooses a 5-number code when programming the keypad. The total number of codes that the consumer can choose from is ________.
A) 252
B) 30,240
C) 57,128
D) 100,000
Q. 6The total sum of squares (SST) measures the amount of variation between each data value and the grand mean.
Indicate whether the statement is true or false
Q. 7A golfer claims that his average golf score at the course he plays regularly is less than 90. A random sample of 35 rounds of golf was selected and the scores were recorded.
Assume that the standard deviation for the population of scores for this golfer is 3.4 and the true population mean for scores for this golfer is 88.2. Using = 0.05, beta equals ________.A) 0.0694
B) 0.0944
C) 0.1292
D) 0.1895
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