1. The IQs of individuals form a normal distribution with mean = 100 and s =...
1. The IQs of individuals form a normal distribution with mean = 100 and s = 15.
A. What percentage of the population have IQs below 85?
B. What percentage have IQs over 130?
C. A college requires an IQ of 120 or more for entrance. From what percentage of the population must it draw its students?
D. In a state with 400,000 high school seniors, how many meet the IQ requirement?
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1. The IQs of individuals form a normal distribution with mean =
100 and s =...
15. IQ scores form a normal distribution with a = 100 and o = 15. Individuals...
15. IQ scores form a normal distribution with a = 100 and o = 15. Individuals with IQs above 140 are classified as having superior intelligence. What proportion of the population has superior intelligence? Answer:
IQs are defined using a Normal distribution with a mean of 100 and a standard deviation...
IQs are defined using a Normal distribution with a mean of 100 and a standard deviation of 15. Your friend says that her IQ is in the top 3%. How high is her IQ?
The IQ scores for adults in the entire population have an approximate normal distribution with mean...
The IQ scores for adults in the entire population have an approximate normal distribution with mean 100 and standard deviation 15. A study done on 200 college students (ages 20 to 25) found college student age 20 to 25 have an average IQ of 105. Do college students aged 20 to 25 years old have a higher mean IQ than the rest of the population? Even if this does have statistical significance (meaning it is actually true), do you think...
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,...
Problem 1: The credit card debt for college seniors has a normal distribution with a mean...
Problem 1: The credit card debt for college seniors has a normal distribution with a mean of $3262 and a standard deviation of $1100. Consider credit card debt of a random sample of 16 college seniors. What is the distribution of mean credit card debt of 16 sampled college seniors? Provide name, mean and standard deviation of the distribution. Problem 2: The following figure shows the distribution of a population. 0.10 0.0 0.06 0.04 0.02 0.00 (a) What is the...
QUESTION 1 A normal distribution has a mean of m= 70 with s = 12. If...
QUESTION 1 A normal distribution has a mean of m= 70 with s = 12. If one score is randomly selected from this distribution, what is the probability that the score will be greater than X = 58? ca. 0.8413 cb.0.1577 OC 0.3413 cd.0.6826 QUESTION 2 A normal distribution has a mean of m= 80 with s = 20. What score separates the lowest 30% of the distribution from the rest of the scores? Ca.X 69.6 b. X 50 CCX=...
A mandatory competency test for high school sophomores has a normal distribution with a mean of...
A mandatory competency test for high school sophomores has a
normal distribution with a mean of 490 and a standard deviation of
130
that.Cum ICWy nect MATH 1342 Online Course Summer il 2019 Elementary Statistics: A Step-By-Step Approach, 101 Edi MATH Hosted by ALEKS CORP 6.2 Homeworkd Next Previous 6.2 Section Exercise 26 (calc) Question 3 of 5 (1 point) A mandatory competency test for high school sophomores has a normal distribution with a mean of 490 and a standard...
1. Scores on a certain nationwide college entrance examination follow a normal distribution with a mean...
1. Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 500 and a standard deviation of 100. Find the probability that a student will score (a) over 650. Answer: (b) less than 459. Answer: (C) between 325 and 675. Answer: (d) If a school only admits students who score over 680, what proportion of the students pool would be eligible for admission? Answer: (e) What limit (score) would you set that makes the...
1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. a. What ...
all questions. Do not round
answers
1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. a. What percentage of scores is between 55 and i 15? b. In a group of 20,000 randomly selected individuals, how many have an IQ score of 130 or more? 2. A Honda Civic has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 33 mpg and a standard deviation of...
A recent national survey found that high school students watched an average (mean) of 7.0 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.0 DVDs per month with a population standard deviation of 0.60 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 43 college students revealed that the mean number of DVDs watched last month was 6.50. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? a. State the null...
15. IQ scores form a normal distribution with a = 100 and o = 15. Individuals with IQs above 140 are classified as having superior intelligence. What proportion of the population has superior intelligence? Answer:
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,...
Problem 1: The credit card debt for college seniors has a normal distribution with a mean of $3262 and a standard deviation of $1100. Consider credit card debt of a random sample of 16 college seniors. What is the distribution of mean credit card debt of 16 sampled college seniors? Provide name, mean and standard deviation of the distribution. Problem 2: The following figure shows the distribution of a population. 0.10 0.0 0.06 0.04 0.02 0.00 (a) What is the...
QUESTION 1 A normal distribution has a mean of m= 70 with s = 12. If one score is randomly selected from this distribution, what is the probability that the score will be greater than X = 58? ca. 0.8413 cb.0.1577 OC 0.3413 cd.0.6826 QUESTION 2 A normal distribution has a mean of m= 80 with s = 20. What score separates the lowest 30% of the distribution from the rest of the scores? Ca.X 69.6 b. X 50 CCX=...
A mandatory competency test for high school sophomores has a
normal distribution with a mean of 490 and a standard deviation of
130
that.Cum ICWy nect MATH 1342 Online Course Summer il 2019 Elementary Statistics: A Step-By-Step Approach, 101 Edi MATH Hosted by ALEKS CORP 6.2 Homeworkd Next Previous 6.2 Section Exercise 26 (calc) Question 3 of 5 (1 point) A mandatory competency test for high school sophomores has a normal distribution with a mean of 490 and a standard...
1. Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 500 and a standard deviation of 100. Find the probability that a student will score (a) over 650. Answer: (b) less than 459. Answer: (C) between 325 and 675. Answer: (d) If a school only admits students who score over 680, what proportion of the students pool would be eligible for admission? Answer: (e) What limit (score) would you set that makes the...
all questions. Do not round
answers
1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. a. What percentage of scores is between 55 and i 15? b. In a group of 20,000 randomly selected individuals, how many have an IQ score of 130 or more? 2. A Honda Civic has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 33 mpg and a standard deviation of...
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