BQA 3123 Test 1 MS State Dr. Ballard Questions With Complete Solutions Central Tendency - Correct Answers ✅Tendency of data to revolve around the middle. It will cluster around certain values.Mean - Correct Answers ✅Average Mode - Correct Answers ✅Most. Might not have one. It is a supplemental value.Median - Correct Answers ✅Middle after put in order If mean is less than median - Correct Answers ✅Negative Skewed Distribution If mean is greater than median - Correct Answers ✅Positive Skewed Distribution If mean is equal to median - Correct Answers ✅Symmetrical distribution What influences the mean? - Correct Answers ✅Outliers or extreme values Range - Correct Answers ✅A measure of variability/spread/dispersion 1 / 2
BQA 3123 Test 1 MS State Dr. Ballard Questions With Complete Solutions Limitation of the range - Correct Answers ✅It only uses two values. Specifically, max and min Emperical Rule - Correct Answers ✅Is used when we have mound-shaped and symmetric distribution and it allows us to say about 68% of data will fall within one st. dev from the mean, 95% within two st. dev, and 99.7% within three st. dev.Normal Distribution - Correct Answers ✅Mound-shaped, symmetric, bell curve area under the curve of 1. Can use area in terms of probability.Chebyshev's Rule - Correct Answers ✅Is used when we do not know anything about the distribution of the data and claims at least 3 (75%) of the data will fall within 2 st. dev from the mean.Z-score - Correct Answers ✅Tells us how many st. dev above or below the mean Two reasons for using Z-scores - Correct Answers ✅The shape of the z-scores distribution will be the same as the original distribution of the raw/original score. They will tell us the exact location of the original score within the distribution.
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