What proportion of students scored outside

Assignment Help Basic Statistics
Reference no: EM132137023

Assume that the mean score on a normally distributed statistics quiz taken by 400 psychology students was 76, and the standard deviation was 8. Ben had a z-score of -1.2.

If someone gave a passing grade only to the top 25% of the class, what is the lowest score that would be considered passing? 

What scores cutoff the middle 40% of grades?

Lowest grade: 

Highest grade:

What proportion of students scored outside of the area between scores 66 and 86?

Reference no: EM132137023

Questions Cloud

What is the relative risk of a heart attack : a) How much lower is the risk of a heart attack for those who took aspirin in the study? b) What is the relative risk of a heart attack?
What would be the diagnostically meaningful cutoff : If the mean score is 150 with a standard deviation of 30, what would be the diagnostically meaningful cutoff?
What is the probability that the combined weight : a. What is the probability that the combined weight of 100 randomly selected cars will exceed the maximum weight? How is this performed in R?
Find the? p-value and critical? value : Assume that the significance level is alpha equals a=0.05. Use the given statement and find the? P-value and critical? value(s).
What proportion of students scored outside : What proportion of students scored outside of the area between scores 66 and 86?
Confidence interval for the temperature : What would be the 95% confidence interval for the temperature of your cup of coffee?
Determine the minimum sample size required : Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean.
Define the parameter of interest in the context : (i) Define the parameter of interest in the context of the problem (ii) State the alternative hypothesis.
Probability that your roommate mailed the letter : If the letter is never delivered, what is the probability that your roommate mailed the letter?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Find a 95 confidence interval for the mean concentration

a laboratory is testing the concentration level in mgml for the active ingredient found in a pharmaceutical product. in

  What is the standard deviation for the number of people

Find the probability that, out of the 6 people chosen, exactly 5 people use a tax preparer. Find the probability that, out of the 6 people chosen, 4 or 5 people use a tax preparer.

  What type of variable is the mode best for

what type of variable is the mode best for

  In an experiment designed to study the effects of

in an experiment designed to study the effects of illumination level on task performance subjects were required to

  What is probability that republican favors death penalty

What's the probability that a randomly chosen voter favors the death penalty?- What's the probability that a Republican favors the death penalty?

  Alternative hypotheses of difference

Creating null and alternative hypotheses of difference based on the following. A company introduces a new product and wants to find out if males or females.

  Review problem on collectible postage stamps

Retailers of collectible postage stamps often buy their stamps in large quantities by weight at auctions. The prices the retailers are willing to pay depend.

  Data support or contradict mendel theory

Does this data support or contradict Mendel's theory? Use a significance level of 5%, and include a conclusion.

  What is the calculated t value

Conduct a hypothesis test and What is the calculated t value? Are the mean test scores of these two groups significantly different at the .05 level - Conduct a hypothesis test.

  Calculate the p-value of the observed sample proportion

State an appropriate null hypothesis and alternative hypothesis for her to consider as the framework for a one-proportion z-test. Calculate the p-value of the observed sample proportion

  Regression equation for the depression screening

If the regression equation for the depression screening example was Y=0.40 + 10(X), then a score of 20 on the screening test (X)

  Quantitative score of students

A graduate recruiter for a university believes that the average Graduate Record Examinations (GRE) quantitative score of students who applied

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