The following frequency distribution presents a set of exam, Ask an Expert

Statistics

The following frequency distribution presents a set of exam scores for a class of N = 20 students.

x f cf c%

90-99.....4 ... 20... 100

80-89.... 7 .....16..... 80

70-79 ....4 .......9...... 45

60-69.... 3....... 5....... 25

50-59..... 2...... 2......... 10

a) Find the 30th percentile.

b) What is the percentile ranking for X=77?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9983525

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

In a multiple choice exam there are 5 questions and 4

In a multiple choice exam, there are 5 questions and 4 choices for each question (a, b, c, d). Nancy has not studied for the exam at all and decides to randomly guess the answers. What is the probability that: (a) the fi ...

The contents of a particular bottle of shampoo marked as

The contents of a particular bottle of shampoo marked as 150 ml are found to be 153 ml at an average, with a standard deviation of 2.5 ml. What proportion of shampoo bottles contain less than the marked quantity? Assume ...

Dave and ellen are newly married and living in their first

Dave and Ellen are newly married and living in their first house. The yearly premium on their homeowner's insurance policy is $400 for the coverage they need. Their insurance company offers a discount of 8 percent if the ...

Medical researchers studying the effects of a low carb diet

Medical researchers studying the effects of a low carb diet versus a normal diet randomly assigned obese patients to one of the two diets. The patients were followed up with after several months and the amount of weight ...

What is measured by the numerator of the z-score test

What is measured by the numerator of the z-score test statistic?

Iformatics and financial applicationsbackgroundthe

Informatics and Financial Applications Background The assignment of a payroll calculator demonstrates Excels ability to automate and present financial calculation information clearly. The ability to build and professiona ...

What is the theory behind callable bonds and when are they

What is the theory behind callable bonds and when are they most likely to be called?

Anbspgovernments department of transportation reported that

A? government's department of transportation reported that in? 2009, airline A led all domestic airlines in? on-time arrivals for domestic? flights, with a rate of 82.9?%. Complete parts a through e below. a. What is th ...

1 define and discuss how to develop the free cash flow

1. Define and discuss how to develop the Free Cash Flow forecast? 2. Define and discuss how to develop the Terminal Value? 3. Define and discuss how to develop the Discount Rate?

Suppose that a certain college class contains 55 students

Suppose that a certain college class contains 55 students. Of these, 31 are sophomores, 28 are history majors, and 6 are neither. A student is selected at random from the class. (a) What is the probability that the stude ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert