Answered step by step

Verified Expert Solution

Link Copied!

Question

1 Approved Answer

Posted on May 13, 2024

I developed an achievement test and normalized it on people throughout the country over a year. My test has scores that are normally distributed with

I developed an achievement test and normalized it on people throughout the country over a year. My test has scores that are normally distributed with a mean of 100 and a standard deviation of 12.

a.Find the probability that a randomly selected adult has IQ < 115

b.Find the probability that a randomly selected adult has IQ > 90

c.Find P_30, which is the IQ score (x in formula) at the 30th percentile.

d. What percentage of adults have scores between 88 and 112?

Step by Step Solution

There are 3 Steps involved in it

Step: 1

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

Step: 3

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Elementary Statistics

Authors: Mario F. Triola

12th Edition

0321836960, 978-0321836960

More Books

Students also viewed these Mathematics questions

Question

★★★★★

Find the probability that a randomly selected adult has an IQ between 110 and 120 (referred to as bright normal). Assume that adults have IQ scores that are normally distributed with a mean of 100...

Answered: 1 week ago

Question

★★★★★

Scores are obtained from the Law School Admission Test (LSAT) are normally distributed with a mean score of 550 and a standard deviation of 110. If a test score is selected at random, find the...

Answered: 1 week ago

Question

★★★★★

A common design requirement is that an environment must fit the range of people who fall between the 5th percentile for women and the 95th percentile for men. In designing an assembly work table, we...

Answered: 1 week ago

Question

★★★★★

Question B3 [2 points]. Examine, analytically and graphically in a diagramme drawn in the PD-z space, the effects of the increase in i*, and show that in the new equilibrium domestic prices can be...

Answered: 1 week ago

Question

★★★★★

Bountiful Industries Ltd. had one patent recorded on its books as at January 1, 2014. This patent had a book value of $365,000 and a remaining useful life of eight years. During 2014, Bountiful...

Answered: 1 week ago

Question

★★★★★

Portillo SA uses a calendar year for financial reporting. The company is authorized to issue 9,000,000 R$10 par ordinary shares. At no time has Portillo issued any potentially dilutive securities....

Answered: 1 week ago

Question

★★★★★

Stephie, who is a theater-lover, attends a theater performance every week in one of the 25 theaters in her city. This year, 11 of these performances are comedies, while the remaining 14 are dramas....

Answered: 1 week ago

Question

★★★★★

You want to estimate the average SAT score for all students who took the Ethan-Davies SAT Preparation course during the past 2 years. You select a simple random sample of 100 such students from a...

Answered: 1 week ago

Question

★★★★★

Presented below are changes in all the account balances of Fritz Reiner Furniture Co. during the current year, except for retained earnings. Compute the net income for the current year, assuming that...

Answered: 1 week ago

Question

★★★★★

Brothers Herm and Steve Hargenrater began operations of their tool and die shop (H & H Tool) on January 1, 1987, in Meadville, PA. The annual reporting period ends December 31. Assume that the trial...

Answered: 1 week ago

Question

★★★★★

What happens when a country is on the verge of bankruptcy?

Answered: 1 week ago

Question

★★★★★

You are a high school counselor. Maria is a 10th grade student who has just moved to the U.S. from Spain because her parents passed away. She is living with her cousin, who is currently on free and...

Answered: 1 week ago

Question

★★★★★

Reflection Questions Please review the assignment instructions and then respond to the following questions. This section must be completed before proceeding with the assignment. 1. Based on what you...

Answered: 1 week ago

Question

★★★★★

An important component of working with clients in any setting is understanding the problems that policies are designed to address, the details of how the policy is designed to affect the problem...

Answered: 1 week ago

Question

★★★★★

In addition to hardware like mobile phones, websites like Google, and software like Office products, there are many different tools that teachers and students can use to facilitate teaching and...

Answered: 1 week ago

Question

★★★★★

QQI Level 5 - 5N2770 - Care Skills - Question 1: Description of the person chosen: A comprehensive description of the person, their impairment, and their needs - physical, emotional, social,...

Answered: 1 week ago

Question

★★★★★

You are given the following data: * * : 4 % IP: 7 % MRP: 1 % DRP: 3 % LP: 2 % Given these conditions, the rate on long - term Treasury bonds is Blank Space. 2 3 % 1 4 % 1 2 % 1 9 %

Answered: 1 week ago

Question

★★★★★

Describe the Operations (+,,*,/) that can cause negligible addition (NA), error magnification (EM), or subtractive cancellation (SC) in calculating ?((x^2)+1) - x . Give the range of where they might...

Answered: 1 week ago

Question

★★★★★

=+b. The actual number of subjects on which each technique was used was 45. After studying the F table, explain why the conclusion in Part (a) still holds.

Answered: 1 week ago

Question

★★★★★

=+allowed the employee being evaluated to discuss previous evaluations, the second involved setting goals for the employee, and the third did not allow either feedback or goal setting. After the...

Answered: 1 week ago

Question

★★★★★

=+a. Suppose that a total of 33 subjects were used, with each technique applied to 11 of them. Use this information to conduct a level .05 test of the null hypothesis of no difference in mean...

Answered: 1 week ago

Previous Question Next Question