Purchase Solution

Mean

Not what you're looking for?

Ask Custom Question

Problem:

Scores for SAT normally distributed with mean of 531 and standard dev. of 114. If college includes minimum score of 600 among requirements, what % do NOT satisfy requirement? Also, graph.

Purchase this Solution
Solution Summary

Scores for SAT normally distributed with mean of 531 and standard dev. of 114. If college includes minimum score of 600 among requirements, what % do NOT satisfy requirement? Also, graph.

Solution Preview

See attachment please!

Problem:
Scores for SAT normally distributed with mean of 531 and standard dev. of 114. If college includes minimum score of 600 among ...

Solution provided by:
Changping Wang, MA
Education
  • BSc , Wuhan Univ. China
  • MA, Shandong Univ.
Recent Feedback
  • "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
  • "excellent work"
  • "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
  • "Thank you"
  • "Thank you very much for your valuable time and assistance!"
Purchase this Solution
Free BrainMass Quizzes
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.

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

  • Statistics - Probability Distribution and Mean Determination

    u+3(mean)=2.35% and u-mean, u, u+ mean =68% and u-2(mean, u-mean, u, u-mean, u+2(mean)=95% u-3(mean), u-2(mean), u-mean, u, u+mean, u+2(mean), u+3(mean)=99.7% The solution file is attached

  • Population and Standard Mean

    What is the probability that the sample mean is within $25 of the population mean? d. What would you recommend if an insurance agency wanted the sample mean to estimate the population mean within + or - $25? Please see the attached file. 1.

  • sampling distribution of mean

    Answer Given Sample mean = 3.02 Sample standard deviation S =1.81 The point estimate of population mean is the sample mean (Sample means tends to population mean by central limit theorem).

  • Hypothesis Testing for the American Sugar Producers Association

    Population mean = sample mean= 60 pounds The best estimator of a population mean is sample mean as sample mean is unbiased estimator for population mean. 2.

  • Probability: Normal Distribution and The Central Limit Theorem

    of the sample mean.

  • Relationship Between Sampling Mean and Population Mean

    In statistics, there is no theory which states sampling mean always understates the population mean. Sampling mean may overstate the population mean in some cases.

  • Paired Sample Procedure

    ., test the hypotheses that the mean difference in writing and reading is zero, and that the mean difference in math and science is zero.

  • Normal Distribution

    What is the probability that the sample mean is between $3.24 and $3.28? c. What is the probability that the difference between the sample mean and the population mean is less than 0.01? d.

  • ANOVA for Emma's On-the-Go

    • Variation between the samples: The variation between the samples is measured by a quantity called the mean square for treatments (also called the mean square for groups, the mean square for factors, and the between groups mean square).

  • Regression equation and forecasting

    Solution: For these data, mean attendance values that are greater than the mean of the mean attendance values tend to be paired with player payroll values that are grater than the mean of the player payroll values.

View More Related Solutions