Your performance as a principal depends on how well your, Ask an Expert

Statistics

Consider yourself to be a middle school principal. Your 115 eighth-graders are about to take a national standardized test. The test is designed so that the mean score is 600 with a standard deviation of 80. Assume the test scores are normally distributed.

a. What is the likelihood that one of your eighth-graders, selected at random, will score below 580 on the exam?
b. Your performance as a principal depends on how well your entire group of eight-graders scores on the exam. What is the likelihood that your group of 115 eighth-graders will have an average score below 580?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9419402

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A tire company measures the tread on newly-produced tires

A tire company measures the tread on newly-produced tires and finds that they are normally distributed with a mean depth of 0.99mm and a standard deviation of 0.35mm. Find the probability that a randomly selected tire wi ...

The weight of the eggs produced by a certain breed of hen

The weight of the eggs produced by a certain breed of hen has an unknown distribution with a mean of 65 grams and a standard deviation of 5 grams. If you purchase 144 eggs, what is the approximate probability that the av ...

What type of data values are quantitative and the number of

What type of data values are quantitative and the number of values is finite or countable?

Which level of risk considers sources of danger or

Which level of risk considers sources of danger or uncertainties that have a direct and model-wide impact?

A sample of 184 randomly selected students found that the

A sample of 184 randomly selected students, found that the proportion of students planning to travel home for Thanksgiving is 0.69. What is the standard deviation of the sampling deviation?

The board of a major credit card company requires that the

The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait is not exceeding the requirement, an assist ...

Want the 98 confidence interval when the sample size is 50

Want the 98% confidence interval when the sample size is 50, sample mean is 42 and sample standard deviation is 5. Keep three decimal places in your response.

A sample of 175 randomly selected students found that the

A sample of 175 randomly selected students, found that the proportion of students planning to travel home for thanksgiving is 0.64 What is the standard deviation of the sampling distribution.

A researcher determines that students study an average of

A researcher determines that students study an average of 60 15 (M SD) minutes per week. Assuming these data are normally distributed, what is the z score for students studying 45 minutes per week?

The statistical and regression questions are listed

The statistical and regression questions are listed below: What is the value of the simple correlation between TICKETS and COST? If you are able to determine the answer, is showing the film in more theatres associated wi ...

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