Purchase Solution

Statistical questions are addressed.

Not what you're looking for?

Ask Custom Question

1) The students in a math class took the Scholastic Aptitude Test (SAT). Their math scores are shown below. Find the mean score.
552 593 358 352 537
349 357 596 470 482
2) Suppose that there are 400 students in your school class. What class rank is the 20th percentile?

3) The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of the bulbs have lifetimes that lie within one standard deviation of the mean on either side? (Use the "68-95.99.7 Rule")
4) Of the histograms below, which one is most likely to be based on a normally shaped
data distribution?

5) The distribution of B.A. degrees conferred by a local college is listed below, by
major.
Major Frequency
English 2,073
Mathematics 2,164
Chemistry 318
Physics 856
Liberal Arts 1,358
Business 1,676
Engineering 868
9,313 total
What is the probability that a randomly selected degree is not in Mathematics

Attachments
Purchase this Solution
Solution Summary

Statistical questions are addressed.

Solution Preview

1. To compute the mean, we sum up all numbers and divide by the number of terms we've added.

Mean = (552+593+358+352+537+349+357+596+470+482)/10 = 464.6

2. 20th percentile is the value below which 20 percent of the observations may be found. Given a class of 400 students, the ...

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

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

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

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.

View More Free Quizzes
Related BrainMass Solutions

  • Quantitative Research Critiques

    Are the major findings included? 4. Are the references recent? 5. Are they from primary sources? Theoretical framework purpose, research questions, hypotheses 1. Are explicit theoretical or conceptual frameworks described? 2.

  • Statistical signficance vs. practical signficance

    The answer is likely to be "No" in both cases, but either way the questions are not addressed by statisticians.

  • Statistical significance vs. practical significance

    The answer is likely to be "No" in both cases, but either way the questions are not addressed by statisticians.

  • Nonparametric Analyses

    If the variables are qualitative, then we would consider nonparametric statistical analysis. Secondly, if the variables are quantitative, but they do not follow normal distributions, then we would consider nonparametric statistical analysis.

  • Clinical research study write up steps and answers

    in the present study Purpose of the present study Specific hypotheses or research questions to be addressed.

  • Quantitative Objects and Variable Types

    Step 1 The three quantitative objects that I will keep track of with respect to the snack food category are the amount of time the customer on the 1-800 phone banks spends on the phone untill her questions or problems are solved by the customer care

  • Contingency Planning in Healthcare

    This could be addressed for the surgical center by accurately ascertaining the statistical chances that the contingency plans will be able to effectively prevent medical emergencies, patient emergencies, etc., and the statistical probability that these

  • Structured & Unstructured Problems

    o Support for multiple decision approaches o Statistical analysis o Components of a DSS for Unstructured Problems * Model management software o Provides a variety of solution models o Financial, statistical, graphical, project management

  • Quantitative Methods - Design Research

    Provides two more research questions: one could that could be answered with a quasi-experimental design and one that could be addressed with a true experimental design.

View More Related Solutions