Purchase Solution

Example of a z-score for statistics students

Not what you're looking for?

Ask Custom Question

Explain the difference between a positive z-score and a negative z-score. If you can give me an example that would be awesome. Thank you.

Purchase this Solution
Solution Summary

An explanation of the z-score statistic and its uses. This response includes an original example to provide complete understanding of the topic.

Solution Preview

Hi again,

Thank you for asking me to help you with this posting.

A z-score describes how many standard deviations a specific piece of data is from the mean. The data set must be considered normal (have a symmetrical bell shape) in order to use the z-score statistic. For example, if a certain piece of data has a z-score of 1.4, this indicates that the data ...

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.

Measures of Central Tendency

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

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.

View More Free Quizzes
Related BrainMass Solutions

  • Quantitative Analysis of Data Problems

    86230 Quantitative Analysis of Data Problems Seven students took a statistics test and a technology test with the following results: Statistics Technology Student Raw Score (X) Standard Score (Z) Raw Score (X) Standard Score (Z) Jennifer 50 +1.50

  • Probability Example: High school graduates

    650254 Probability Example: High school graduates High school graduates: The National Center for Educational Statistics reported that 82% of freshmen entering public high schools in the U.S. in 2009 graduated with their class in 2013.

  • Statistics Problems

    What is a Z score for a car with a price of $30,000? c. At what percentile rank is a car that sold for $30,000? 3. In one elementary school, 200 students are tested on the subject of Math and English.

  • Statistics - Place three students in order from lowest to

    277429 Statistics: Ordering from Lowest to Highest Score On a psychology exam with µ = 76 and σ = 12, Tom scored 8 points below the mean, Mary had a score of X = 73, and Bill had a z-score of z = -0.50.

  • Probabilities, z scores and distributions

    Jolie has a time of 45 minutes for doing her statistics homework. If the mean is 38 minutes and the standard deviation is 3, calculate Jolie's z score.

  • What percentage of sample means are less than 70?

    487702 A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?

  • figure out the percentile based on the z score

    485134 Statistics 1. A sample of 148 of our statistics students rated their level of admiration for Hilary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06 and the standard deviation was 1.70.

  • Statistics - Confidence Intervals for ACT Scores

    477815 Statistics - Confidence Intervals I need help completing this question: A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4.

  • Statistics: Analyze Student Exam Scores

    If A's are given to students who score 90% or above, what is the minimum z-score of someone getting A? Solution: 90% of 300 = 0.9*300 = 270 Minimum z-score for getting an A is +2.5. 20. Let's say you got 235 on this test.

View More Related Solutions