Bqa 3123 Test 1 Ms State Dr. Ballard

Chebyshev's Rule {Ans: 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.}Conditions/Assumptions for a small sample CI {Ans: Random sample from target population, the frequency distribution of the population is approximately normal due to Theorem 5.1 assuring us that the sampling distribution of the mean will be approximately normal.}Emperical Rule {Ans: 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.}Properties of Z-scores {Ans: Mean of Z-scores, standard deviation of Z-scores is always 1}Normal Distribution {Ans: Mound-shaped, symmetric, bell curve area under the curve of 1. Can use area in terms of probability.}Limitation of the range {Ans: It only uses two values. Specifically, max and min}