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
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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
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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
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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
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Central Tendency (Page 1 of 16) 3.1 Measures of Central Tendency Mean‚ Median and Mode a. mean‚ x = Example 1 b. ! x = sum of the entries n number of entries Find the mean of 26‚ 18‚ 12‚ 31‚ 42 The median is the middle value of an ordered set of data. If there is an even number of data values‚ then the median is the mean of the two middle values. Example 2 Find the median of 25‚ 30‚ 37‚ 21‚ 38 Example 3 Find the median of 3‚ 7‚ 9‚ 4‚ 8‚ 2‚ 6‚ 5 c. The mode is the most frequently occurring
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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
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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
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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
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A horizontal analysis Income Statement was performed for Company G utilizing financial data from income statements in 2011 and 2012. A listing of ratios used‚ calculations and year-to-year comparison follows. 1. “Current Ratio†measures the ability to pay current liabilities with current assets. The current assets divided by current liabilities. In 2011 the current ratio was 1.86. By 2012‚ it decreased to 1.79 rating in the lower second quartile group in the industry. Company G’s ability
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Exam 1 Chapter 1 * In statistics the group we wish to study is called the population * A sample is a subset of the population which is used to gain insight about the population. Samples are used to represent a larger group‚ the population. * • Descriptive statistics – the collection‚ organization‚ analysis‚ and presentation of data. * Inferential statistics – uses descriptive statistics to estimate population parameters; an educated guess about the population based on sample
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