W#1 – NOTE Stats lit #1

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Fairleigh Dickinson University *

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2023

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Statistics

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Feb 20, 2024

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Uploaded by mlle445

W#1 – NOTE Stats lit #1 Which of the following can be attributed to statistician Florence Nightingale? Check all that apply. If necessary, conduct some supplemental research in order to answer this question. - She reformed medical care and healthcare record keeping. - She investigated mortality rates among soldiers, much like modern day actuaries would. - She performed distinguished service as a wartime army nurse. - She represented big data graphically for the purposes of statistical analysis. Can an object or item in a data collection be known as an individual? - Yes A variable captures some characteristic of an object, item, or individual. - True An attribute of a qualitative data item or individual is not a categorical variable. - False A quantitative variable is a measurement taken from a data item. - True A distribution is not a data collection. - False Which of the following charts and graphs are appropriate when depicting qualitative data visually and graphically? - Pie chart - Bar graph Which of the following charts and graphs are appropriate when depicting quantitative data visually and graphically? - Histogram - Stem plot - Time plot Can a time plot be described as a graph for time series data, where time is often represented as the horizontal scale?

- Yes Can a histogram be described as a bar graph adapted for quantitative data where the axis shows scaled data? - Yes Although a polygon is known in geometry as a multi-sided closed figure in a plane, in statistics it is a line graph representing frequency details about a quantitative data collection. Its shape is similar to a histogram but it is only a series of points at the peaks of the columns; those points are connected by line segments, hence the line plot. - Yes What seven-letter word describes an individual or data point that falls outside the typical patterns in a data collection? In other words, it is an unusual and unrepresentative data item, very inconsistent with the majority of data points. - Outlier A back-to-back stemplot can be described as a visual display from Exploratory Data Analysis where two data sets are positioned side-by-side for comparison purposes, with a common column of stems between them. (For example, looking at the first or innermost entries on the third line, Babe Ruth hit 22 homeruns during one season, whereas Roger Maris hit 23.) - Yes

According to this back-to-back stemplot displaying the numbers of homeruns hit per seasons by noteworthy Major League Baseball players Babe Ruth and Roger Maris, what was the maximum number of homeruns in one season by Babe Ruth? Enter your response as a counting number. - 60 According to this back-to-back stemplot displaying the numbers of homeruns hit per seasons by noteworthy Major League Baseball players Babe Ruth and Roger Maris, what was the maximum number of homeruns in one season by Roger Maris? Enter your response as a counting number. - 61 According to this back-to-back stemplot displaying the numbers of homeruns hit per seasons by noteworthy Major League Baseball players Babe Ruth and Roger Maris, is it reasonable to conclude that the numbers of homeruns the two baseball sluggers hit per season were consistent, and that they achieved comparably when hitting homeruns? - No Can the shape of a distribution be considered symmetric if its left half approximately mirrors its right half, and if not, it would be skewed or asymmetric? - Yes A collection where most of the data is amassed to the left with fewer values occurring to the right tail area is conventionally described by statisticians as being skewed left or left skewed. FALSE or TRUE ? - True A collection where most of the data is amassed to the right with fewer values occurring to the left tail area is conventionally described by statisticians as being skewed left or left skewed. FALSE or TRUE ? - False Can the shapes of right-skewed data collections also be described as positively skewed? - Yes

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