What type of graph am I describing?
Charts representing parts of a whole
Pie chart
What is a z-score?
"The number of standard deviations that a given value x is above or below the mean."
The following data set has a mean of 10, what is x? {12, 3, 6, 18, 12, 11, 3, 19, x}
6
Type of bar graph drawn with no gaps
Used for quantitative data
Horizontal represents classes of data values
Vertical represents frequencies
Histogram
What is the z-score of a score of a 50 on a test when the mean is 70 and the standard deviation is 4.
-5
Calculate the mean, standard deviation, variance, maximum, and minimum of the following values
4.4, 19.2, 13.6, 15.8, 7.2, 9.3, 2.2, 5.8, 10.1, 13.9
Statistics
Mean StDev Variance Minimum Maximum
10.15 5.42 29.38 2.20 19.20
Bar graphs for qualitative data
Pareto Chart
Which is relatively better a score of 70 on a test with a mean of 65 and a standard deviation of 5,
or a score or 50 on a test with a mean of 47 and a standard deviation of 4? Justify your answer.
Score of 70 with a mean of 65 and a standard deviation 5 is better because it has a z-score of 1 compared to the other z-score which is 0.75.
The probability that my air conditioning works is .6. The probability that the temperature >90 is .4.
The probability that my AC is working AND the temperature > 90 is .2.
What is the probability that my AC is working OR the temperature > 90?
.8