WGU 955

Which of the following numbers is taken out to the hundredths place? a 1.1 b 1 c 1.04 d 1.047 1.04 Please evaluate the following expression: (Be sure to convert your answer to a mixed number or reduce the fraction to its lowest terms.) 6 3/8 + 4 1/2 = ? a 10 3/8 b 10 5/8 c 10 7/8 d 11 1/8 10 7/8 Please evaluate the following expression with decimals: 7.82+2.947= ? a 10.767 b 8.114 c 10.029 d 9.127 10.767 Please evaluate the following expression with percenta...

lurking variable A variable that is not included in an analysis but that is related to two (or more) other associated variables which were analyzed. observational study The researcher observes if there is an association between variables. There is no treatment or control group. sampling method The technique used to select people within the sampling frame. correlation An observed relationship between two quantitative variables. While this is most commonly a linear relatio...

set In mathematics: a collection of numbers. identity property The property that 0 can be added to any number without changing the value of the number. Likewise, 1 can be multiplied by any number without changing the value of that number. prime number A number with only two factors: one and itself. factor An integer that divides another integer. We say an integer, x, is a factor of another integer, y, if the quotient y/x is also equal to an integer. superscript A...

Discrete data Has distinct values, can be counted, had unconnected points (think dots) Continuous data Has values within a range, measured not counted, does not have gaps between data points (data is connected lines or curves). Example of discrete data Days of the week Expressions A group of symbols such as numbers and operators that has mathematical validity Commutative The order in which the numbers appear in the sum can be reversed Identity property Ad...

The relationship between the two variables on a scatterplot can be measured by what statistic? {{ Scatterplot of sales on the x-axis and profit index on the y-axis. }} a Correlation coefficient ( r ) b Regression c ANOVA d Chi-square Correlation coefficient ( r ) A study was completed to investigate if commutes of longer than 30 minutes increased the risk of burnout. The results of the study are in the table below. ,Lenth of Commute ,<30 Minutes ,>30 Minutes ,Total Ris...

Conditional Probability (and Probability) P(B|A) = P(A and B)/P(A) or P(A|B) = P(A and B)/P(B) Determining Independence P(B|A) = P(B) or P(A and B) = P(A) x P(B) can be used. Multiplication Rule for Independent Events If two events are independent, then P(A and B) = P(A) x P(B). Disjoint Two events which cannot both occur at the same time. Theoretical Probability Formula Probability of Event = # of outcomes in the event / Total # of outcomes in the sa...

skewed right A skewed distribution where the long tail of the curve is on the positive side of the peak. skewness A measure of the degree to which a probability distribution "leans" toward one side of the average, where the median and mean are not the same. the Standard Deviation Rule A standard proportion or percentage of data points that lie within each standard deviation away from the mean for a normal distribution. symmetry The quality of the data having the same s...

Identify the number of terms and the coefficient for the x term in the expression: 4x−3y+7 a Terms: 2 ; Coefficient: −3 b Terms: 2 ; Coefficient: 4 c Terms: 3 ; Coefficient: −3 d Terms: 3 ; Coefficient: 4 Terms: 3 ; Coefficient: 4 What is the equation of the graph in slope-intercept form? {{ A graph of a line moving up and to the right that passes through (0,-1) and (1,2). }} a y=−3x−1 b y=3x−1 c y=3x+1 d y=−3x+1 y=3x-1 Solve for x in the following equatio...

Boxplot an image that has min, Q1, median, Q3, max Histogram A graphical representation -- bars, measuring the frequency within each interval Skewed right Not a symmetric distribution, the tail is on the right, i.e. extra stuff on the right Measures of center Median, the mean (and mode) Measures of spread Range, IQR & standard deviation Standard Deviation Rule 68% of the data are within 1 standard deviation, 95% are within 2, 99.7 are within 3 standard de...

Boxplot an image that has min, Q1, median, Q3, max Histogram A graphical representation -- bars, measuring the frequency within each interval Skewed right Not a symmetric distribution, the tail is on the right, i.e. extra stuff on the right Measures of center Median, the mean (and mode) Measures of spread Range, IQR & standard deviation Standard Deviation Rule 68% of the data are within 1 standard deviation, 95% are within 2, 99.7 are within 3 standard de...