The general idea is that interaction between two factors means that the effect due to one of the factors is not uniform across all levels of the other factor.
Indicate whether the statement is true or false
Q. 2Given a population where the proportion of items with a desired attribute is p = 0.25, if a sample of 400 is taken, what is the standard deviation of the sampling distribution of ?
A) 0.0512
B) 0.0312
C) 0.0217
D) 0.0412
Q. 3A cell phone company believes that 90 percent of their customers are satisfied. They survey a sample of n = 100 customers and find that 82 say they are satisfied.
In calculating the standard error of the sampling distribution (p) the proportion to use is 0.82. Indicate whether the statement is true or false
Q. 4The number of calls to an Internet service provider during the hour between 6:00 and 7:00 p.m. is described by a Poisson distribution with mean equal to 15. Given this information, the expected number of calls in the first 30 minutes is 7.5 calls.
Indicate whether the statement is true or false
Q. 5A study recently conducted by a marketing firm analyzed three different advertising designs (factor
A) and four different income levels (factor B) of potential customers. At each combination of factor A and factor B, 5 customers are observed and the number of products produced is recorded. Interaction between the two factors would exist if low income customers have higher mean buying when design 1 is used, but higher income customers have higher mean buying when designs 2 and 3 are used.
Indicate whether the statement is true or false
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