What proportion of students should score above 120

Reference no: EM13240583

A psychologist has developed a test to measure self-control. The test is normed so that it has a mean of 100 and a standard deviation of 15... The scores are normally distributed in the population of college students used to develop the test.

a. What is the percentile rank of a score of 80?

b. What percentage of scores falls between 80 and 120?

c. What is the standard score for a test score of 90?

d. What proportion of students should score above 120?

e. What is the cutoff point below which 87% of all scores fall?

Reference no: EM13240583

Questions Cloud

Explain methanol can be produced by the reaction : Methanol can be produced by the reaction shown below with the following thermodynamic data given at 25 degree Celcius.

What was his velocity when he began accelerating : A runner accelerates to a velocity of 5.36 m/s due west in 3 s. His average acceleration is 0.64 m/s2, also directed due west. What was his velocity when he began accelerating

What is the research hypothesis should you conduct a one : What is the research hypothesis? Should you conduct a one-or two tailed test? Why?

Subject of your summa and why would you choose this subject : you are an educated young man who completed your doctorate at the University of Paris in 1250 A.D. What would be the subject of your “ summa” and why would you choose this subject?

What proportion of students should score above 120 : A psychologist has developed a test to measure self-control. The test is normed so that it has a mean of 100 and a standard deviation of 15... The scores are normally distributed in the population of college students used to develop the test.

For how long time does he sees the train : A man sitting inside the waiting room of a train station is looking out of a window at the train tracks, For how long time does he sees the train

What is the probability that the sample mean exceeds $37000 : For the total population of a large southern city, mean family income is $34000, with a standard deviation (for the population) of $5000.

Eighteenth-century styles of rococo-neoclassicism reflect : How did the eighteenth-century styles of rococo and neoclassicism reflect and contribute to the prevailing political and social trends of the ages?

Serum cholesterol levels were taken from a population of 10 : Serum cholesterol levels were taken from a population of 10,000 college students. The results were normally distributed. Males had a mean of 195 and a standard deviation of 10.

User Account

All Pages