Question: Scores on a certain intelligence test for children between ages 13 and 15 years are approximately Normally distributed with = 101 and o =

Scores on a certain intelligence test for children between ages 13 and

Scores on a certain intelligence test for children between ages 13 and 15 years are approximately Normally distributed with = 101 and o = 24. (a) What proportion of children aged 13 to 15 years old have scores on this test above 87? (NOTE: You may enter your answer in percentage or decimal form. For example, 45.23% or 0.4523). 58 (b) Enter the score which marks the lowest 20 percent of the distribution. (c) Enter the score which marks the highest 10 percent of the distribution.

Step by Step Solution

★★★★★

3.49 Rating (156 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a b 77 c 125 1304 a To find the proportion of children aged 13 to 15 years old who have sco... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Accounting Questions!

On March 1, 2017, Elkhart enters into a new contract to build a specialized warehouse for $ 7 million. The promise to transfer the warehouse is determined to be a performance obligation. The contract...

Scores on a standardized test are approximately normally distributed with a mean of 480 and a standard deviation of 90. a. What proportion of the scores are above 700? b. What is the 25th percentile...

Scores on a certain accounting exam were normally distributed with a mean of 75 and a standard deviation of 7. Find the percentile for each individual using Excel's =NORM.S.DIST function. (a) Bob's...

An experiment was conducted to determine whether surface finish has an effect on the endurance limit of steel. An existing theory says that polishing increases the average endurance limit (reverse...

The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean = 71 and a variance a2 = 8. Would you still consider 2 = 8 to be a...

The United Football League (UFL), a North American professional football league, has been in work stoppage since July 1, 2013, immediately after the six-week training camp ended. Faced with stalled...

From the document National Vital Statistics Reports, a publication of the National Center for Health Statistics, we obtained the following frequency distribution for the ages of women who became...

An investigator for the state police wants to determine the effectiveness of three different defensive driving training programs to see if there are gender differences. Five subjects of each gender...

A real estate agent needs to estimate the average value of a residential property of a given size in a certain area. The real estate agent believes that the standard deviation of the property values...

According to the College Board, the mean quantitative SAT score for female college-bound high school seniors in 2012 was 500. SAT scores are approximately normally distributed with a population...

Answer these questions in Spanish 1. Te gusta usar una calculadora en la clase de matemticas? 2. Vas a beber un vaso de agua? 3. Qu comes cuando tienes hambre? 4. Qu haces cuando tienes sed? 5. Qu...

The greek philosopher Archimedes once said give me a lever arm long enough and a place to rest it, and I will move the world. Thats quite excessive, so for now, well be moving a car. Treat the car as...

Find the centroid o f the region cut from the first quadrant b y the circle x 2 + y 2 = a 2 . The coordinates o f the centroid are ( x , b a r ( y ) ) = a s needed.

Say that we are in year 2025. Storms happen every year with probability p = 5%. Let RV T indicate the year of the next storm, after 2025. a) What are the mean and the std. of T? b) Consider the event...

A manufacturer of mens underwear claims that 93 percent of the products are of the best quality, 6 percent are seconds, and only 1 percent are defective. To test this claim, 500 garments selected at...

Each year, Foster Coproduces 45,000 units of a component to use in transcontinental blimps. An outside supplier has offered to supply the part for $4.05. The unit cost is: Direct Materials: $1.00...

28. The Chief Financial Officer (CFO) of a restaurant chain notices that the travel expenses for the Chief Executive Officer (CEO) are much higher than anticipated for the year. She suspects that the...

R *praxis 5442 Middle School Science / Question Se of ties A common student misconception is that the seasons are related to the distance of Earth from the Same (class in summer, farther in winter),...

Refer to Exercise 10 in Section 7.4. a. Divide the data into two groups: points where R1

Ten items are to be sampled from a lot of 60. If more than one is defective, the lot will be rejected. Find the probability that the lot will be rejected in each of the following cases. a. The number...

A process has a process capability index of Cp = 1.2. a. Assume the process mean is set to its optimal value. Express the upper and lower specification limits in terms of the process mean and...

In each scenario, will wages rise above the market equilibrium or fall below it? a. All but one of the factories in a town go out of business. b. All the software engineers in Silicon Valley organize...

Suppose a cafe owner wants to switch to automatic espresso machines instead of paying baristas to pack the coffee grounds by hand. The machines are twice as effective as a human; the fixed cost per...

Imagine that, faced with budget shortfalls, a government changes its current policy of granting tax credits based on family size to a flat rate tax credit for a family with one or more children. a....