Suppose IQs are normally distributed with a mean of 100 and a standard deviation of 16....
Suppose IQs are normally distributed with a mean of 100 and a standard deviation of 16.
a) If one person is randomly selected, what is the probability that the person’s IQ is higher than 90 but lower than 115?
b) If eight people are randomly selected, what is the probability that the sample mean IQ is higher than 90 but lower than 115?
Homework Answers
Add Answer to:
Suppose IQs are normally distributed with a mean of 100 and a
standard deviation of 16....
. IQ's are normally distributed with a mean of 100 and a standard deviation of 10....
. IQ's are normally distributed with a mean of 100 and a standard deviation of 10. If a person is selected at random, what is the probability that his/her IQ is between 100 and 115? What is the probability that his/her IQ is higher than 120? What about lower than 100?
IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose...
IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual Find the probability that the person has an IQ greater than 115. Write the probability statement P(___) What is the probability? (Round your answer to four decimal places.)
IV. Assume that IQ scores are normally distributed, with a mean of 100 and standard deviation...
IV. Assume that IQ scores are normally distributed, with a mean of 100 and standard deviation of 15. What is the probability that a randomly selected person has an IQ score a greater than 120? b. less than 902 c. between 90 and 120? d. between 105 and 120?
Suppose IQ scores are normally distributed with mean 100 and standard deviation 10. Which of the...
Suppose IQ scores are normally distributed with mean 100 and standard deviation 10. Which of the following is false? Group of answer choices A normal probability plot of IQ scores of a random sample of 1,000 people should show a straight line. Roughly 68% of people have IQ scores between 90 and 110. An IQ score of 80 is more unusual than an IQ score of 120. An IQ score greater than 130 is highly unlikely, but not impossible.
Problem #2: IQs are known to be normally distributed with mean 100 and standard deviation 15....
Problem #2: IQs are known to be normally distributed with mean 100 and standard deviation 15. (a) What percentage of people have an IQ lower than 90? (b) Fill in the blank. 75% of the population have an IQ that is greater than NOTE: Do not use the first half of the normal table (i.e., page 742 in the textbook, with negative z-values) because it will not be provided with the tests. Problem =2(a): Enter your answer as a percentage,...
Scores on a memory test are normally distributed with a mean of 16 and standard deviation...
Scores on a memory test are normally distributed with a mean of 16 and standard deviation of 10.70. 1) What proportion of people have scores of 18 or higher? 2) Suppose that you randomly select one person from this population. What is the probability that this person will have a score less than 13? 1. a).6141 b).3859 c).4286 d).5714 2. a).28 b).72 c).6103 d).3897
NEED EXCEL FORMULAS!!! Suppose the variable is the population of IQs, which are normally distributed with...
NEED EXCEL FORMULAS!!! Suppose the variable is the population of IQs, which are normally distributed with a mean of 100 and a standard deviation of 16. a. About what proportion of people have IQ scores equal to or less than 116? b. About what proportion of people have IQ scores between 100 and 116? c. About what proportion have IQ scores greater than 120? d. What would your IQ need to be to be in the top 2% of all...
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16.
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16. Find the probability that a randomly selected utility bill is (a) less than $69. (b) between $84 and S90, and (c) more than $120 (a) The probability that a randomly selected utility bill is less than $69 is _______ (b) The probability that a randomly selected utility bill is between $84 and $90 is _______ (c) The probability that a randomly selected utility...
iq scores are normally distributed with a mean of 100 and a standard deviation of 15....
iq scores are normally distributed with a mean of 100 and a standard deviation of 15. a person who's score is higher than 84% has iq of?
The IQ scores of adults are normally distributed with a mean 100 and a standard deviation...
The IQ scores of adults are normally distributed with a mean 100 and a standard deviation of 15. If a group of 64 adults is randomly selected, what is the probability that their mean IQ will be at least 95? A. 0.6293 B. 0.3707 C. 0.9962 D. 0.0038
IV. Assume that IQ scores are normally distributed, with a mean of 100 and standard deviation of 15. What is the probability that a randomly selected person has an IQ score a greater than 120? b. less than 902 c. between 90 and 120? d. between 105 and 120?
Problem #2: IQs are known to be normally distributed with mean 100 and standard deviation 15. (a) What percentage of people have an IQ lower than 90? (b) Fill in the blank. 75% of the population have an IQ that is greater than NOTE: Do not use the first half of the normal table (i.e., page 742 in the textbook, with negative z-values) because it will not be provided with the tests. Problem =2(a): Enter your answer as a percentage,...
Most questions answered within 3 hours.
-
Explain traveling wave theory. Explain how the peaking of the
wave leads to action potentials and...
asked 7 minutes ago -
If you mixed 35.0 mLmL of 0.100 M Tris-HCl with 65.0
mLmL of 0.200 M Tris-base, what would...
asked 4 minutes ago -
Which force do you think wields a stronger influence over our
ethical behavior – our personal...
asked 10 minutes ago -
11.1 In the northeast
regions of the United States and in eastern Canada, many people
heat their...
asked 8 minutes ago -
What is the entropy change to the surroundings when 1 mol of ice
melts in someone's...
asked 10 minutes ago -
Are adult gamers less likely to use a gaming console (Xbox,
PlayStation, Wii, etc...) than teen...
asked 15 minutes ago -
Pt1
An electrochemical cell is set up at 25°C based on the overall
reaction represented by...
asked 16 minutes ago -
Bruin, Inc., has identified the following two mutually
exclusive projects:
Year
Cash Flow (A)
Cash...
asked 18 minutes ago -
A mutual fund salesperson has arranged to call on four people
tomorrow. Based on past experience...
asked 22 minutes ago -
The decomposition of SO2Cl2 is first order
and has a rate constant of + 2.90 x...
asked 44 minutes ago -
A solid, frictionless cylindrical reel of mass M=5.00kg and
radius R=0.55m is used to draw water...
asked 1 hour ago -
The work done by the spring's restoring force
on the free end of a spring while...
asked 38 minutes ago