Purchase Solution

Statistical Distribution Of Concern Scores

Not what you're looking for?

Ask Custom Question

Suppose that a researcher found that the people living in a particular city have a mean score of 40 and a standard deviation of 5 on a measure of concern about the environment. Assume that their concern scores are normally distributed. Approximately what percentage of people in this city have a score (a) above
40, (b) above 45, (c) above 30, (d) above 35, (e) below 40, (f) below 45, (g) below 30, (h) below 35? What is the minimum score a person has to have to be in the top (i) 2%, (j) 16%, (k) 50%, (l) 84%, (m) 98%?
(Use the 50%-34%-14% approximations for this problem.)

Purchase this Solution
Solution Summary

The solution is comprised of a step by step calculation of percentages of a normal distribution concerning the statistical distribution of concern scores.

Solution Preview

Suppose that a researcher found that the people living in a particular city have a mean score of 40 and a standard deviation of 5 on a measure of concern about the environment. Assume that their concern scores are normally distributed. Approximately what ...

Purchase this Solution
Free BrainMass Quizzes
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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.

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

  • Normal distribution

    Additionally, a number of behavioral statistical procedures are based on the assumption that scores are normally distributed; for example, t-tests and ANOVAs. Bell curve grading assigns relative grades based on a normal distribution of scores. 6.

  • Normal Distribution and Z-Scores

    Normal distribution and z-scores are discussed in different statistical situations.

  • Biostatistics - Fitness of the Mean

    The mean is the average of the scores and the variance is how the scores are spread out in the distribution. The standard deviation is the average distance of all the scores in the data set from the mean.

  • Statistical Operations and Frequency

    Create a frequency distribution. . Construct a frequency polygon and describe the shape of the distribution. . Calculate three measures of central tendency. . Calculate three measures of variability. .

  • Standard Deviation of SAT Scores

    227941 Standard Deviation of SAT Scores According to the data from the College Entrance Examination Board, scores on the SAT-I test have a mean of 1017, and Q1 is 880. The scores have a distribution that is approximately normal.

  • Characteristics of Normal Distribution

    Additionally, a number of behavioral statistical procedures are based on the assumption that scores are normally distributed; for example, t-tests and ANOVAs. Bell curve grading assigns relative grades based on a normal distribution of scores.

  • Statistical Analysis of a Given Data

    Student Height and the Normal Distribution. a) Construct a histogram of the students' height in centimeters. b) Use the histogram and any other statistical tools that might be useful to determine if the distribution is normal. IMPORTANT!

  • Sample Mean and Proportion

    The Excel file contains the calculations for the means, standard deviations, z scores and probabilities. The Word file shows step-by-step calculations for the z-scores and summarizes the results of the Excel file.

  • Normality: standard deviation applicability

    Now suppose in doing the statistical analysis we included an abnormal sample of those who are well above the normal distribution. Statistically we call these scores outliers, meaning that they represent scores and a population outside the norm.

View More Related Solutions