It has been found that the average IQ score of students is 115 with a stanard deviation of 6. Find the probability that a random selected student will have an IQ score above 119. Assum the IQ scores are normally distributed.

1 answer

119-115=4 is .6667σ

119 is µ+.6667σ

So you want the right tail above .6667σ
Consult your handy Z table to see that that's 25.14%

Similar Questions

The score for half of the students in a class on a certain test was 90. The score for another fourth of the students was 84. if

Top answer: 1/2 (90) + 1/4 (84) + 1/4 (x) = 82 LCD = 4 2 (90) + 1 (84) + 1 (x) = 4 (82) 180 + 84 + x = 328 x = Read more.
10.Thirty students in a chemistry class took a test on which the overall average score was 78. If the average score for 15 of

Top answer: 78*30 = 2340 total score 85 * 15 = 1275 score for top 15 students 2340 - 1275 = 1065 1065 / 15 = ? Read more.
A student wants to test her hypothesis she gives each of her students an IO test. She finds that the average IQ score is 115 and

Top answer: How about a one-sample t-test? Your sample size is fairly small. Fill in what you know into the Read more.
Students in an English class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. The

Top answer: what's the problem? Just plug in t=0: S(0) = 68-20log(1) = 68 - 20(0) = 68 Although, as written, Read more.
Students in an English class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. The

Top answer: You say your equation is not valid for t=0. Why not? I would assume S(0) = 28 - 20log1 = 28 Note Read more.
The Average Score in the entrance examination in MSHS is 80 with a standard deviation of 40 students was taken from this

Top answer: Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something Read more.
170 students in a lecture hall can scream at 115 dB.Thus, we should expect that: A. an average student can do 0.68 dB by him or

Top answer: an increase of 10db reflects a tenfold increase in sound power. Read more.
170 students in a lecture hall can scream at 115 dB.Thus, we should expect that: A. an average student can do 0.68 dB by him or

Top answer: Wouldn't ten times the number of students be an increase of 10 db? Read more.
tira and francisco applied to the same college. they looked up the average SAT score of students admitted to that college. tiras

Top answer: C. |290 - 10| Read more.
If the highest score is100 and the average score for12 students is 95. What is the lowest score in order to get the average of

Top answer: The lowest <i>possible</i> score would occur when all the others are as high as possible. 12*95 = Read more.