Aptitude test scores in normal distribution

Assignment Help Basic Statistics
Reference no: EM1391960

In a normal distribution of 1,000 aptitude test scores, with a mean of 60 and a standard deviation of 8, how many scores fall:

A) above 50?

B) between 48 and 52?

Reference no: EM1391960

Questions Cloud

What is the ucl : You know the standard deviation of the sample means is 4, the desired confidence level is 99.7 percent, and the average of the sample means is 24. What is the UCL?
Rules for normal approximation : Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
Antibodies against the measles virus : Assume blood isolated from an emergency room patient contains antibodies against the measles virus. Describe whether or not the patient should be quarantined immediately because they are infected with the measles virus.
Differences in the proportions : Determine whether the difference in proportions is significant at the 0.05 level.
Aptitude test scores in normal distribution : In a normal distribution of 1,000 aptitude test scores, with a mean of 60 and a standard deviation of 8, how many scores fall:
What transformations effect society with advanced degree : Describe in your own words what transformations (professional goals) you expect to effect for yourself and society with advanced degree.
Finding stock solution amount : Assume you have a stock solution with a concentration of 722g/L. You want to make one liter of solution with a concentration of 39g/L.
Bonferroni adjustment to determine the alpha level : If a researcher decides to use multiple comparisons in a study with three conditions, what is the probability of a Type I error across these comparisons? Use the Bonferroni adjustment to determine the suggested alpha level.
What is the resulting lcl value for the line : From the samples you determine the fraction defective is 0.006 and the standard deviation is 0.001. If the desired confidence level is 99.7 percent, what is the resulting LCL value for the line?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Frequency distribution for the number of errors

You are given the following frequency distribution for the number of errors 55 students made in a test:

  Standard deviation of the distribution

In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?

  Introduce basic library search tools

Introduce some basic library search tools and demonstrate the relevance of statistics (in this case, regression analysis) to your chosen field of study. MS 3043 - Spring 2014 Project

  Accessing link support in circuit switching

If circuit switching is utilized, how many user can this access link support?

  Determining bivariate normal distribution

Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?

  Conclusion of mean waiting time

At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?

  Probability of estimating the mean

What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?

  Determining the probability and percentile

If person is selected at random and tested, determine the probability of that person having an IQ score between 85 and 115. Make use of EXCEL to help determine the probability.

  Find an approximate p-value for test

A two-way ANOVA model was used to analyze an experiment with two levels of one factor, three levels of a second factor, and 6 observations per treatment combination.

  To find the probability of rolling pair of dice

Consider the experiment of rolling a pair of dice. Suppose that we are interested in the sum of the face values showing on the dice.

  Probability-sample size and standard deviation

20 students in a class - if there is a 15% probability that a randomly chosen member has seen a particular movie - what is the expected number of students have seen the movie?

  Comparison of two variables using standard deviation

What is the standard deviation of expected returns for Stock X? For Stock Y?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd