When determining the sample size required for a 95 confidence interval for the population mean, the sample mean needs to be known.
Indicate whether the statement is true or false
Q. 2Including a blocking factor that is not effective in randomized block ANOVA could result in ____________________.
A) decreasing the probability of a Type I error
B) decreasing the probability of a Type II error
C) increasing the probability of a Type I error
D) increasing the probability of a Type II error
Q. 3The hypothesis test for a single population variance requires that the sample size is greater than 30.
Indicate whether the statement is true or false
Q. 4Consider the following population which represents the number of pieces of junk mail that I received during the month of February.
2 4 0 3 5 1
0 2 3 0 4 6
1 1 3 5 0 2
3 0 2 3 3 1
Using the first row of data as a sample, the sampling error is ________.
A) 0.00
B) 0.25
C) -0.50
D) 0.75
Q. 5Negative autocorrelation is rarely observed in a time series.
Indicate whether the statement is true or false
Q. 6The purpose of the blocking factor in randomized block ANOVA is to ________________.
A) increase some of the variability in the blocking factor which may allow us to better detect a difference due to the main factor
B) remove some of the variability in the blocking factor which may allow us to better detect a difference due to the main factor
C) increase some of the variability in the main factor which may allow us to better detect a difference due to the blocking factor
D) remove some of the variability in the main factor which may allow us to better detect a difference due to the blocking factor
Q. 7We can approximate the standard error of the proportion by substituting the sample proportion, p, for the population proportion, p.
Indicate whether the statement is true or false
Q. 8The average weight of the entire batch of the boxes of cereal filled today was 20.15 ounces. A random sample of four boxes was selected with the following weights: 20.05, 20.56, 20.72, and 20.43. The sampling error for this sample is ________.
A) 0.00
B) -0.16
C) 0.11
D) 0.29
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