Key Terms
A histogram where the intervals are cumulative.
What is a cumulative frequency histogram?
The shape of a distribution with the following data 1,1,1,1,2,2,2,3,3,3,4,4,4,4.
What is Uniform.
The mean for this list of data: 3,4,3,5,6,9
What is 5
A sample chosen at random of size n such that every group of n items or individuals in the population has an equal chance to be selected.
What is an SRS? Or Simple Random Sample
An arrangement of values of a variable showing their observed or theoretical frequency of occurrence.
What is a distribution.
What are the parts of describing a distribution? (Hint: S___, O____, C_____, Sh_____)
What is spread, outlier, center, shape
The shape of the distribution with the following data look like? 1,2,5,5,5,6,16,16,16,17,17,17,17,17,18,18,18,18,18,18,19,19,19,19,19,19,19
What is skewed left.
Deliberately imposes treatments on units to measure their response.
What is an experiment?
A variable that takes numerical values for which arithmetic operations such as adding and averaging can take place.
What is Quantitative Variable.
The shape of the distribution with the following data 1,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,4,4,4,4,5,5,5,26,29.
What is right skewed.
The standard deviation for the list 3, 4, 3, 5, 6, and 9 rounded to the nearest tenth.
What is 2.3.
An extraneous variable that is associated with both the explanatory variable and the response variable in a statistical study.
What is a confounding variable?
Minimum, Q1, M, Q3, and Maximum
What is Five-Number Summary
Standardize score or this value is calculated by subtracting the median from a score and dividing by standard deviation.
What is a z-score?
What does a graph with the following data look like? (hint use a histogram) 1,1,1,2,2,2,2,3,3,4,4,5,5,5,5,6,6,6.
What is bimodal or 2 peaks
The IQR for the distribution of grades in this list:
80 95 74 90 85 95 80 75
What is 15.
A statistical study that is very likely to either over or underestimate the population parameter due to a flaw in the collection process is said to have this.
What is Bias?
Average of the squared deviations of the observations from their mean.
What is What is Variance s^2
The standard deviation of the distribution:
80 80 80 80 80
What is 0.
What does a graph with the following data look like? (hint use a histogram) 1,2,2,3,3,3,4,4,4,4,5,5,5,5,5,6,6,6,6,7,7,7,8,8,9
What is Symmetric or Normal
The standard deviation of a distribution with variance 23.04.
What is 4.8?
When some subjects in an experiment will respond favorably to any treatment, even an inactive treatment.
What is the placebo effect?