WGU C955 EXAM LATEST WGU C955 PROBABILITY AND
STATISTICS OBJECTIVE ASSESSMENT EXAM NEWEST
ACTUAL EXAM QUESTIONS AND WELL ELABORATED
ANSWERS (100% CORRECT VERIFIED ANSWERS) LATEST
UPDATES |GUARANTEED PASS A+ (BRAND NEW!!!)
Boxplot - ANSWER: an image that has min, Q1, median, Q3, max
Histogram - ANSWER: A graphical representation -- bars, measuring the frequency
within each interval
Skewed right - ANSWER: Not a symmetric distribution, the tail is on the right, i.e.
extra stuff on the right
Measures of center - ANSWER: Median, the mean (and mode)
Measures of spread - ANSWER: Range, IQR & standard deviation
Standard Deviation Rule - ANSWER: 68% of the data are within 1 standard deviation,
95% are within 2, 99.7 are within 3 standard deviations from the mean.
For skewed data, use these for center and spread - ANSWER: In this situation, we use
median (for center) & IQR (for spread)
Explanatory variable - ANSWER: In a study, what we think is the "cause"
Response variable - ANSWER: In a study, what we think is the "effect"
Scatter plot - ANSWER: A graphical representation of Q -> Q
Two way table - ANSWER: A graphical representation of C -> C
Side-by side box - ANSWER: A graphical representation of C -> Q
Linear relationship - ANSWER: "shaped like a line"
Correlation coefficient, r - ANSWER: Between -1 and 1; measures how close the
points are to the line and if the trend is uphill (positive) or downhill (negative).
r = -0.2, for example - ANSWER: This is an example of a correlation coefficient that
represents a weak negative correlation.
r = 0.9, for example - ANSWER: This is an example of a correlation coefficient that
represents a strong positive correlation.
STATISTICS OBJECTIVE ASSESSMENT EXAM NEWEST
ACTUAL EXAM QUESTIONS AND WELL ELABORATED
ANSWERS (100% CORRECT VERIFIED ANSWERS) LATEST
UPDATES |GUARANTEED PASS A+ (BRAND NEW!!!)
Boxplot - ANSWER: an image that has min, Q1, median, Q3, max
Histogram - ANSWER: A graphical representation -- bars, measuring the frequency
within each interval
Skewed right - ANSWER: Not a symmetric distribution, the tail is on the right, i.e.
extra stuff on the right
Measures of center - ANSWER: Median, the mean (and mode)
Measures of spread - ANSWER: Range, IQR & standard deviation
Standard Deviation Rule - ANSWER: 68% of the data are within 1 standard deviation,
95% are within 2, 99.7 are within 3 standard deviations from the mean.
For skewed data, use these for center and spread - ANSWER: In this situation, we use
median (for center) & IQR (for spread)
Explanatory variable - ANSWER: In a study, what we think is the "cause"
Response variable - ANSWER: In a study, what we think is the "effect"
Scatter plot - ANSWER: A graphical representation of Q -> Q
Two way table - ANSWER: A graphical representation of C -> C
Side-by side box - ANSWER: A graphical representation of C -> Q
Linear relationship - ANSWER: "shaped like a line"
Correlation coefficient, r - ANSWER: Between -1 and 1; measures how close the
points are to the line and if the trend is uphill (positive) or downhill (negative).
r = -0.2, for example - ANSWER: This is an example of a correlation coefficient that
represents a weak negative correlation.
r = 0.9, for example - ANSWER: This is an example of a correlation coefficient that
represents a strong positive correlation.
