Probabilities always have a value between ___ and ___
0 and 1 (0% and 100%)
100
A box plot with a wider right side of the box and a longer line extending to the right side.
right skewed
100
X ̅
X-bar, represents the mean
100
The entry 2 5 in a stem and leaf plot with leaf units of 0.1 represents a data value of _____
2.5
100
3, 8, 7, 8, 10. Find the mean.
7.2
200
The joint probability P(A and B) is found where in a probability table.
The inside of the table at the intersection of A and B
200
A data set in which the mean is equal to the median.
symmetrical
200
S
standard deviation
200
A cumulative relative frequency tells you what percentage of data values are _____ than a specified value.
less than
200
1, 1, 6, 10, 4, 9. Find the median.
5
300
In a study about the preference of coke or pepsi among males and females, the statement "45% of males prefer coke" is an example of a _____ probability
Conditional Probability
300
A histogram with it's peak roughly in the center of the chart.
symmetrical
300
P(B|A)
Probability of B given A, chance of B happening assuming A happens, conditional probability of B given A
300
The empirical rule states that about ____% of values will fall within 1 standard deviation from the mean.
68
300
14, 13, 14, 9, 9, 10, 4. Mean = 10.43. Std. Dev. = 3.33. Find the Z-scores of 14 and 4. Are either of these values outliers?
Z(14)=1.07 Z(4)=-1.93 Neither are outliers.
400
Conditional probabilities P(A|B) are found where in a probability table.
They are not found in a probability table. They are outside of the table.
400
A data set in which the mean is less than the median.
left skewed
400
n
sample size
400
What five values are needed to create a box plot?
minimum, 1st quartile(25th percentile), median(50th percentile), 3rd quartile(75th percentile), maximum
If the two events A and B are independent, P(A and B)= _______
P(A) x P(B)
500
A histogram with it's peak on the right side of the chart.
left skewed
500
Z
Z-score, the number of standard deviations away from the mean a particular value is. Negative Z-score indicates below the mean, positive Z-score indicates above the mean.
500
Contingency tables are used to simultaneously summarize data on two ______ variables.
categorical
500
2, 2, 9, 4. Mean=4.25. Find the standard deviation.