How many students expected to score in range

Assignment Help Basic Statistics
Reference no: EM13134173

On a standardized test with a normal distribution, the mean is 75 and the standard deviation is 6. If 1200 students took the test, approx how many students would be expected to score between 69 and 81?

Reference no: EM13134173

Questions Cloud

Define group on a benzene ring will be activating : What determines whether a group on a benzene ring will be activating or deactivating and ortho para
Find probability that selected x-value is in given interval : Find the probability that a randomly selected x-value from the distribution is in the given interval. Between 29 and 37.
What happens to consumer surplus : What happens to consumer surplus and what happens t o the economic profits earned by Widget Corp.?
Paragraphs about the gun control in college campuses : 3 paragraphs about the gun control in college campuses. Those paragraph just explain about why student should not be allowed to carry gun to school.
How many students expected to score in range : The mean is 75 and the standard deviation is 6. If 1200 students took the test, approx how many students would be expected to score between 69 and 81?
Explain conversion for a specific product : Conversion for a Specific Product, Indicate the reaction conditions you would employ to accomplish the following
Calculate the marginal propensity to consume : Calculate the Marginal Propensity to Consume - Furthermore you know that the marginal propensity to save (MPS)equals 0.4
Equipment and average cost of inventory : The payroll costs for the year were $100,000, and the accounting costs for the year totaled $50,000. The departments and the average cost of store equipment and average cost of inventory for each are as follows:
Correct statistical decision using a two-tailed test : The hypothesis test produces a z-score of z = -2.60. Assuming that the researcher is using a two-tailed test, what is the correct statistical decision.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Develop the null and alternative hypothesis

A research study will measure the cost of the new method over a sample production period. Develop the null and alternative hypothesis most appropriate for this study.

  Multiple comparison procedures

Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?

  Probability of choosing license plate ends with even number

Determine the probability of choosing at random license plate which ends in the even number?

  Sales using this multiple regression analysis

You will actually have negative sales using this multiple regression analysis

  Test of hypothesis-z statistic and p-value

A manufacturer claims that the mean lifetime, mean, of its light bulbs is 52 months. The standard deviation of these lifetimes is 7 months. Ninety bulbs are selected at random, and their mean lifetime is found to be 55 months.

  Determining probability of sample mean

Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas

  Probability-standard normal distribution

Nationwide, GMAT scores in a particular year had an average of 528 with an SD of 112 and the scores roughly followed a normal curve. If a student scored 600 on the exam, approximately what percentage of test-takers scored below this student?

  Normality and business research

R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution".

  Determining nonparamettic anova

The National Turkey Association wants to experiment with three different feed mixtures for very young turkeys. Since no experience exists regarding the three mixtures, no assumptions can be made about the distribution of weights.

  Probability of weight of loaf of bread

A loaf of bread is normally distributed with a mean of 22 oz. and a standard deviation of 0.5 oz. What is the probability that a loaf is less than 22.25 oz.?

  Qualitative and quantitative variables

The Acme School of Locksmithing has been accredited for the past 15 years. Discuss how this information might be interpreted as a

  Importance of the null hypothesis

What is the importance of the null hypothesis? Why has it been the backbone of mainstream hypothesis testing for decades? What are its limitations?

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