Applied Biostatistics I QuizStar
What is the continuous data range for the following series of pharmacology grades? [72, 67, 63, 97, 82, 82, 77, 43, 55, 92, 68]
54
Calculate the CLOSEST STANDARD ERROR OF THE MEANS FOR THIS DATA SET WITH A STANDARD DEVIATION OF 30.1: [92 97 80 11 87 82 96 68 58 5 40 87 82 7 50 38 50 73 39 58 78 17 55 4 71]
6 {Explanation: SEM is usually estimated by the sample estimate of the population standard deviation (sample standard deviation) divided by the square root of the sample size (assuming statistical independence of the values in the sample); 30.1/square root of 25= ~ 6)
For the following data set (n = 16), calculate the sample median. [12, 4, 6, 8, 12, 9, 12, 7, 2, 4, 3, 11, 9, 2, 12, 11]
8.5
Bivariate data that depicts five mutually exclusive conditions is likely to be continuous in nature.
False.
Which of the following descriptors best describes data that can be used to precisely count, but does not include an absolute zero reference?
Interval scale
For the following data set (n = 16), calculate the sample mode. [12, 4, 6, 8, 12, 9, 12, 7, 2, 4, 3, 11, 9, 2, 12, 11]
12
Which of the following describes "Ratio Scale"?
2 degrees Kelvin
Calculate the PRACTICAL RANGE of the following complete data set of 20 variates (Xi): 92 97 80 10 87 83 96 68 58 5 40 87 82 7 48 38 52 73 39 58
92
Which of the following describes "Interval Scale"?
98.6 degrees F
Which of the following best describes EMPIRICAL probability?
A proportion of occurrences observed in the trial
Which of the following describes "Nominal Scale"?
Boys and Girls
In a majority of medical and biological displays of derived data sets, which of the following would include the usual quantity of data points?
Data points that fall within +/- ~2 SD of Mean
Which of the following describes "Ordinal Scale"?
Dave:1, Fred:2, Martha:3, Julie:4, Pete, 4: Mark:6, Mike: 7, Tye: 9, Alex:10.
Statistical techniques used to count, organize and report complete results obtained from analysis of the total patient population should best be labeled as which of the following?
Descriptive statistics
Which of the following descriptors best describes data arranged in some order to permit analysis of spread and clusters?
Distribution
Which of the following describes "deviate"?
Examines dispersion of data with a sample and reported in the same units as raw data.
Which of the following best describes "standard deviation"?
Mean of the summed-squares of the difference for each data point measured against the mean of the sample.
Which of the following describes "variance"?
Mean of the summed-squares of the difference for each data point measured against the mean of the sample.
For the following data set (n = 16), describe the sample skew. [12, 4, 6, 8, 12, 9, 12, 7, 2, 4, 3, 11, 9, 2, 12, 11]
Negative; tail on the left!
Which of the following descriptors best describes data that only classifies, but does not order or count?
Nominal scale
Which of the following descriptors best describes data that only orders by rank, such as 1st, 2nd, and 3rd, etc.
Ordinal scale
Which of the following is a characteristic feature that is often estimated and describes a population?
Parameter
Which of the following descriptors best describes data that can be used to count and includes an absolute zero as a reference?
Ratio scale
Which of the following describes "sampling error"?
The discrepancy that exists between a sample statistic and a population parameter.
T/F: When the rate of occurrence of a MI event is high in nursing homes with large numbers of unrelated patients, the distribution of the data are likely to be skewed right and take on a the appearance of a normal distribution when plotted.
True