Iqr interquartile range Study guides, Class notes & Summaries

If 200 people are surveyed, how many claim to have had no exercise? {{ Pie chart reflecting the average number of hours exercised per week. No exercise 36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours 4%, more than 7 hours 2%. }} a 18 b 36 c 72 d Cannot determine - Answer 72 Determine the range for the following data set. {1,24,26,28,32,36,38,40,65} a 1 to 65 b 64 c 65 d Cannot determine - Answer 64 It is important to start the freque...

Business (Intelligence) Analytics Final Exam 2024 || All Questions & Solutions (Rated A+) Business (Intelligence) Analytics Final Exam 2024 || All Questions & Solutions (Rated A+) Histogram - ANSWER - a graph for a quantitative variable; we usually slice up all the possible values into bins and then count the number of cases that fall in each bin Relative frequency histograms - ANSWER - percentages of each bin in the histogram Stem-and-leaf displays - ANSWER - are like histograms, but ...

CHAPTER 3: NUMERICAL DESCRIPTIVE TECHNIQUES TRUE/FALSE 1. The mean is affected by extreme values but the median is not. ANS: T NAT: Analytic; Descriptive Statistics 2. The mean is a measure of variability. ANS: F NAT: Analytic; Descriptive Statistics 3. In a histogram, the proportion of the total area which must be to the left of the median is more than 0.50 if the distribution is positively skewed. ANS: F NAT: Analytic; Descriptive Statistics 4. A data sample has a mean of 107, a median...

BUSINESS 1000 MAT 300 M2 Latest Verified Review 2023 Practice Questions and Answers for Exam Preparation, 100% Correct with Explanations, Highly Recommended, Download to Score A+ 1 Which of the following is NOT a step used in calculating standard deviation? • Squaring the difference of x - u. • Subtracting the value of each data set from the mean. • Calculating the mean of the data set. • Dividing the sum of each value by the total number of values plus 1. RATIONALE ...

Lurking Variable - Associated with the explanatory and the response variables that is not directly being studied. Simpson's Paradox - Occurs when a trend or result that appears in groups of data disappears when we combine the data. Regression Analysis - A process for estimating and analyzing the relationship between variables. Least-Squares Regression Line - AKA the line of best fit. y = mx + b "rise over run" Interpolation - Using existing data along with the Least-Squares Re...

quantitative data - Answer Quantitative data consists of data values that are numbers, representing quantities that can be counted or measured. The Empirical Rule - Answer According to The Empirical Rule, approximately 68% of the data points in a dataset will be within 1 standard deviation of the mean. 95% of all values are within 2 standard deviations of the mean. Normal distribution - Answer In a normal distribution data is symmetrical, so the mean, median, and mode are all equal. mea...

STAT 503 FINAL Exam with Verified Solutions 2024 Is a quantitative variable always measured in numbers? - Answer -Yes Is any measurement that you record from a sample a variable? - Answer -False What is a statistic? - Answer -The measure that is taken from the whole sample as a summary of the sample Sample data skewed to the left, then longer tail is at the... - Answer -Left What is sensitive to outliers? - Answer -Median Formula to calculate standard deviation - Answer -s = sqrt(sum(x1-...

WGU C207 Actual Exams with Correct Answers(Recent Version)(Management Data driven decision making) 1. Which of the following statistics are unaffected by a single large outlier? (More than one) * --------- CORRECT ANSWER ----- Median, mode, Interquartile range (IQR) 2. Which of the following is most suitable for policy making based on income distribution? * --------- CORRECT ANSWER ----- Median Because of assumed skewed distribution 3. If we study data from a population whose mean is 20...

BSNS 112 Exam Preparation Questions And Correct Answers, Complete Verified Solution. Descriptive statistics - methods of organising, summarising and presenting data in a good form e.g. graphs, tables, measures Inferential statistics Random sample of data taken from a population to describe and make inferences about the population Types of data quantitative and qualitative Quantitative data Numerical e.g. Age in years Qualitative data Grouped or categorical e.g. S, M, L, XL, XXL C...

Cluster sample - correct answer a sample where the population is divided into groups and several groups are randomly selected and all from those selected groups are sampled Histogram - correct answer Vertical bar chart that shows frequency on the y-axis Mean - correct answer the average of a data set. affected by extremes/outliers Mode - correct answer ...