Purchase Solution

Frequency Distribution and Measures of Variation

Not what you're looking for?

Ask Custom Question

Pandas: The size of the home ranges (in square kilometers) of several pandas were surveyed over a year's time, with the following results.

Home Range Frequency
.1-.5 11
.6-1.0 12
1.1-1.5 7
1.6-2.0 6
2.1-2.5 2
2.6-3.0 1
3.1-3.5 1

Sketch a histogram and frequency polygon for the data.

28. Life of Light Bulbs: A certain type of light bulb has an average life of 500 hours, with a standard deviation of 100 hours. The length of life of the bulb can be closely approximated by a normal curve. An amusement park buys and installs 10,000 such bulbs.

Find the shortest and longest lengths of life for the middle 80% of the bulbs.

See attached file for full problem description.

9.1 - Question #40
9.3 - Question #28

Purchase this Solution
Solution Preview

For #40, I made the chart in Excel. A histograph is a bar chart in which the height of the bars represents the frequency for each category (this is in pink in the chart). A frequency polygon is made by connecting the points that have the center of the category intervals as their x-coordinate and the frequency as their y-coordinate (this is in blue in the chart).

For #28, the text is also in the ...

Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

View More Free Quizzes
Related BrainMass Solutions

  • Summary Statistics and Data Collection

    580367 Summary Statistics and Data Collection What are the three measures of central tendency? What are measures of variation?

  • Frequency Distribution with Skewed Data

    However, if the data distribution is skewed, it affects the usability of standard error and not being good measures of variability as spread varies between the left and right of the peak value and a uniform value of the spread cannot be applied to such

  • mean and standard deviation

    A) 12B) 18 C) 38 D) 58 1 Find the indicated probability by using the special addition rule. 5) A relative frequency distribution is given below for the size of families in one U.S. city. 5) Size Relative frequency 2 0.457 3 0.204 4 0.192 5 0.099

  • Exploratory Data Analysis for AJ Davis, a department store chain

    The frequency distribution and pie chart are given as follows: Frequency Distribution: Location Frequency Urban 21 Suburban 15 Rural 14 From the frequency distribution and pie chart, it is evident that the maximum number of customers belongs

  • Frequency, variation and distrinbution

    Per capita income is very close ot a normal distribution with a median salary of 13.6. Maximum number of salaries fall in 12 to 14 range. The solution determines the frequency, variation and distribution.

  • Dispersion Measures

    The standard deviation and variance are widely used measures of dispersion. 3) Coefficient of Variation: We said that standard deviation measures the variation in a set of data.

  • Market Research Data Analysis

    In a Likert scale which denotes 1 as strong agreement and 5 strong disagreement, the frequency distribution responses and their variation are easily shown.

  • Create a frequency distribution, central tendency, variability, z-score

    Perform the following statistical operations on the "Height" data set forth in it using a Microsoft Word document: Create a frequency distribution Construct a frequency polygon and describe the shape of the distribution Calculate three measures of

  • Mean and Variance-A comparision

    There are 5 major measures of dispersion: Range Interquartile Range Standard Deviation Variance Coefficient of Variation Standard deviation and variance are mostly used measures.

View More Related Solutions