Definition The box plot is a graphical representation of data that shows a data set’s lowest value‚ highest value‚ median value‚ and the size of the first and third quartile. The box plot is useful in analyzing small data sets that do not lend themselves easily to histograms. Because of the small size of a box plot‚ it is easy to display and compare several box plots
Premium Median
to the right (Positively skewed) Mode < Median < Mean b) Skewed to the left (Negatively skewed) Mode > Median > Mean c) Symmetric Distribution Mode = Median = Mean Measures of Central Tendency: The Mean‚ Mode and Median The mean is the average of scores: Population mean: μ = Σ xi/N Sample mean: x = Σ xi/n The mode is the value that has the highest frequency The median is the middle value of data ordered from lowest to highest The median and the mode are relatively less sensitive
Premium Standard deviation Median Random variable
illustrates the location of data samples from a point of central tendency or the measure of the samples‚ grouped together‚ and there position spread across intervals. Locational measures include the mean‚ the median‚ the mode‚ percentiles and quartiles. The mean is the average of the date set. The median represents the middle of the group in ascending order. The mode can be various numbers in which similar numbers appear most frequently in the sample; there can be more than one mode. The percentiles
Premium Standard deviation Median
residual c) voluntary response bias d) placebo 2. (13 points) The frequency table below summaries the horsepower of 50 cars. Horsepower Frequency 80 7 90 13 100 12 110 7 120 4 130 3 140 2 150 1 160 0 170 1 a) Construct a histogram. b) Find the mean‚ median‚ standard deviation‚ and IQR. c) Describe the distribution’s shape‚ center‚ and spread. Justify your answer. d) Add a column to the table for relative frequency. e) Add another column to the table for cumulative relative frequency. f) What is the
Premium Standard deviation Median Arithmetic mean
4 400 pt 1 3 450 pt 0 2 500 Fifty undergraduate students answered a survey. The results are shown here. Q-2a: What is the average expected salary of these undergraduates upon graduation? (Round to two decimals) Q-2b: What is the median amount spent on textbooks? (Round to two decimals) Q-2c: What is the mode with respect to the number of affiliations to clubs and other organizations of these undergraduates? Q-2d: What is the standard deviation of these students’ GPAs
Premium Arithmetic mean Standard deviation Median
of the analysis will be on marketing strategies and analysis-related topics (South University Online‚ 2012). The sample set was examined thoroughly to reveal findings relevant to the marketing strategies and the interpretation of the data. The median income is between the $50‚000 income and the $74‚999 income. The frequency of 449 is the highest between the income level of 50‚000 and 74‚999. The distribution of income is skewed and it is slightly right. The mean age is around 51 with the standard
Premium Statistics Regression analysis Standard deviation
14-10-12 下午1:09 ECON-3740 Introduction to Econometrics - Fall‚ 2014 Instructor: D Prescott Due date: Thursday‚ 16 October‚ 3pm Submit Reports to D Prescott’s Office‚ Room 733 MacKinnon Report #1 - Instructions. No reports will be accepted after the deadline. Please submit what you have completed by the deadline. See the course web page for additional information on programming and spreadsheet hints. BE SURE TO USE THE DATA SET ASSIGNED TO YOU Grades will be assigned to each section. The
Premium Statistics Median Linear regression
What is central tendency? Explain three important measures of central tendency? • Measures of central tendency are scores that represent the center of the distribution. Three of the most common measures of central tendency are: – • Mean Median Mode – – The Mean The mean is the arithmetic average of the scores. – Mean is the average of the scores in a distribution _ X = _________ i N Σ Xi Mean Example Exam Scores 75 91 82 78 72 94 68 88 89 75 ΣX =sum all scores
Premium Arithmetic mean Standard deviation Average
their menu‚ amenities‚ services‚ and statistics regarding the restaurant communities. The factors that we analyzed are listed in Table 1. Table 1. List of Factors Compared to Monthly Profit We computed descriptive statistics (mean‚ median‚ mode‚ standard deviation‚ coefficient of variation‚ range‚ and outliers) for the 16 factors given in the data and for monthly profit. Of the 16 factors used in the analysis‚ five stand out for their clear association with an increase in monthly
Premium Profit Median Arithmetic mean
and determine the host countries for the 2012 Summer and 2014 Winter Olympics. Summer 2012 Finalists 1. Country with the closest score to the archery mean: 2. Country with the median time in sailing: 3. Country with 3 more points than the median of upper part in handball: 4. Country with 1.5 fewer points than the median of lower part in volleyball: 5. Country with the lowest time on right whisker of box-and-whisker plot of kayak times: Summer 2012 Host Country 6. Country closest to one-third of
Premium Olympic Games Median Summer Olympic Games