Question

5. Several intelligence tests gave a score that follows a normal law with a mean of...

5. Several intelligence tests gave a score that follows a normal law with a mean of 100 and standard deviation 15. a. Determine the percentage of the population that would obtain a coefficient between 95 and 110. b. Which interval centered on 100 contains 50% of the population? c. In a population of 2500 individuals, how many individuals are expected to have a coefficient greater than 125?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The Stanford-Binet Intelligence Scale is an intelligence test, which, like many other IQ tests, is standardized...
The Stanford-Binet Intelligence Scale is an intelligence test, which, like many other IQ tests, is standardized in order to have a normal distribution with a mean of 100 and a standard deviation of 15 points. As an early intervention effort, a school psychologist wants to estimate the average score on the Stanford-Binet Intelligence Scale for all students with a specific type of learning disorder using a simple random sample of 16 students with the disorder. Determine the margin of error,...
   Assuming a population is normally distributed with a mean score of 100 and a standard...
   Assuming a population is normally distributed with a mean score of 100 and a standard deviation of 10. A) What is the probability of selecting an item from the population with a score of more than 110? B) What proportion of the population is expected to have scores above 100? C) What is the probability of a score between 95 and 110? D) What is the probability of a score less than 95? E) What is the probability of...
Question1: It is known the population IQ score follows a normal distribution with mean as 100,...
Question1: It is known the population IQ score follows a normal distribution with mean as 100, SD as 10. A researcher is interested in studying if the average IQ of students from statistics courses on average has a higher IQ score than the population IQ score. To test this hypothesis, the researcher randomly collected a sample of 25 students from statistic class, the mean IQ score for this sample is 110. Compete for the hypothesis test at significant level. Step...
IQ scores are known to be normally distributed with a mean of 100 and a standard...
IQ scores are known to be normally distributed with a mean of 100 and a standard deviation of 16. a. Determine the percentage of students who score between 85 and 120. b. Determine the percentage of students who score 80 or greater. c. Obtain the quartiles, Q1, Q2, and Q3 for the IQ scores, and show this on a sketch of a normal curve. Include both a z-axis and an x-axis below the curve. d. If Mensa only accepts the...
Q1. [5 pts] Suppose that Z follows a standard normal. Calculate the probability that: a)Z is...
Q1. [5 pts] Suppose that Z follows a standard normal. Calculate the probability that: a)Z is less than 1.25. b)Z is greater than 1.75. c)Z is between 1.25 and 1.75. d)Z is between -1.25 and 1.75. e)X is between 85 and 105, where X follows a normal with mean of 100 and SD of 10.Note: Write probabilities as decimals and to the four decimal places (e.g., 0.2538). Q2. What is the value of z such that:a)the probability of a standard...
1) Do you want to own your own candy store? Wow! With some interest in running...
1) Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate Factory. Startup costs (in thousands of dollars) for a random sample of candy stores are given below. Assume that the population of x values has an approximately normal distribution. 96 176...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean...
1.The sample mean is an unbiased estimator for the population mean. This means: The sample mean always equals the population mean. The average sample mean, over all possible samples, equals the population mean. The sample mean will only vary a little from the population mean. The sample mean has a normal distribution. 2.Which of the following statements is CORRECTabout the sampling distribution of the sample mean: The standard error of the sample mean will decrease as the sample size increases....
Answer the question. CHAPTER 8: ESTIMATION AND CONFIDENCE INTERVALS 1. As degrees of freedom increase, the...
Answer the question. CHAPTER 8: ESTIMATION AND CONFIDENCE INTERVALS 1. As degrees of freedom increase, the t-distribution approaches the: A. binomial distribution B. exponential distribution C. standard normal distribution D. None of the above 2. Given a t-distribution with 14 degrees of freedom, the area left of - 1.761 is A. 0.025 B. 0.05 C. 0.10 D. 0.90 E. None of the above 3. 100 samples of size fifty were taken from a population with population mean 72. The sample...
1. Find the area under the standard normal curve (round to four decimal places) a. To...
1. Find the area under the standard normal curve (round to four decimal places) a. To the left of  z=1.65 b. To the right of z = 0.54 c. Between z = -2.05 and z = 1.05 2. Find the z-score that has an area of 0.23 to its right. 3. The average height of a certain group of children is 49 inches with a standard deviation of 3 inches. If the heights are normally distributed, find the probability that a...
MATHEMATICS 1. The measure of location which is the most likely to be influenced by extreme...
MATHEMATICS 1. The measure of location which is the most likely to be influenced by extreme values in the data set is the a. range b. median c. mode d. mean 2. If two events are independent, then a. they must be mutually exclusive b. the sum of their probabilities must be equal to one c. their intersection must be zero d. None of these alternatives is correct. any value between 0 to 1 3. Two events, A and B,...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT