Grade 11 and 12 Mathematics (Moderator: geoffrey)

The histogram of 19 exam scores is given below. What is the relative frequency of the 80 to less ...

Started by iveyjurea

What word best describes a distribution whose mean is significantly larger than its median? ...

Started by magmichele12

The average test score was a 77 with a standard deviation of 5. Using the Empirical Rule, ...

Started by ssal

Twenty four countries were randomly selected from the World Factbook 2001 list of world countries. ...

Started by saliriagwu

Below are the results of tossing a single coin 20 times. What is the relative frequency of observing ...

Started by jessicacav

Below are the results of rolling a single die ten times. What is the relative frequency of observing ...

Started by rmenurse

Is number of servings of a caffeinated beverage a binomial random variable? 1.Yes, because each ...

Started by robinn137

How many ways can two defectives occur among 5 randomly selected parts? Assume the lot of parts ...

Started by deesands

Find the probability of at least one female in a random sample of five students if 60 of the ...

Started by Capo

Find the probability of no more than two females in a random sample of five students if 60 of the ...

Started by SAVANNAHHOOPER23

Enrollment is 60 male. In a class of 20 students, what is the standard deviation for the number of ...

Started by savannahhooper

Sections of the Scholastic Aptitude Test (SAT) have a mean score of 500 and a standard deviation of ...

Started by schs14

Find the area under the standard normal curve between z = 0 and z = 1.53. 1.0.4370 2.0.4357 ...

Started by newbem

Find the area under the standard normal curve and above z = 2.73. 1.0.0032 2.0.4977 3.0.4941 ...

Started by bucstennis@aim.com

Find the z-score the represents the 70th percentile. 1.-0.08 2.0.08 3.0.52 ...

Started by mmm

Find the z-score the represents the 95th percentile. 1.0.02 2.0.33 3.1.645 ...

Started by sdfghj

As the sample size increases the ________. 1.Standard error increases and the sampling distribution ...

Started by anshika

According to the NCHS the average height of females in the U.S. is 63.7 inches with a standard ...

Started by lbcchick

In order to accurately estimate an unknown population parameter, it would be best to start with: ...

Started by Alygatorr01285

A 90 confidence interval has a confidence coefficient of z(0.05). What is its value? 1.1.65 ...

Started by dmcintosh

A group of adolescents all from families that have college-educated parents are tested to determine ...

Started by Mollykgkg

In theory, a larger n should constitute a sample standard deviation that is a better point estimate ...

Started by misspop

A sample of size 12 is taken from a population that is symmetrical and mounded. A sample mean of ...

Started by NguyenJ

A hypothesis test is conducted to determine if a refrigeration unit is cooling at 36o. A sample of ...

Started by segrsyd

True or False: The margin of error will decrease as the sample size decreases. 1.True ...

Started by CBme