The distribution of the scores on a certain exam is N(50,5),which means that the exam scores are Normally distributed with a mean of 50 and standard deviation of 5. Using the Empirical Rule, the probability that a randomly selected score will be less than 40 is about ___%.
Q: Scores on the Wechsler Adult Intelligence Test are normally distributed with a mean of 100 and a…
A: Given:' Mean = μ=100 Standard deviation = σ= 10
Q: The owner of a fish market has an assistant who has determined that the weights of rainbow trout are…
A: Mean(µ) = 3.6Standard deviations (σ) = 1.2n = 16
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A: From the provided information, Mean (µ) = 505 Standard deviation (σ) = 180 Let X be a random…
Q: According to a study done by Pierce students, the height for Hawaiian adult males is normally…
A:
Q: A particular fruit's weights are normally distributed, with a mean of 783 grams and a standard…
A: It is given that the mean is 783 and the standard deviation is 24.
Q: Assume that adults have IQ scores that are normally distributed with a mean of 97.8 and a standard…
A: Given a mean of 97.8 and a standard deviation of 23
Q: mean thickness of 4 mm and a standard deviation of 1.1 mm. A simple random sample of 90 sheets of…
A: Given: Mean=μ=4Standard deviation=σ=1.1Sample size=n=90Sample mean=x¯=4.1 First, we have to obtain…
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A:
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A: From the given information, Mean = 520 Standard deviation = 180 Sample size = 35 The objective…
Q: Average temperatures in May in a certain city are normally distributed with a mean of 70 degrees and…
A: Introduction: The sampling distribution of the sample mean, X̄, based on a sample of size n, taken…
Q: A study shows that the intelligence quotient (IQ) of adults in a country follows a normal…
A:
Q: Suppose the scores, on a college entrance examination are normally distributed with a mean of 1000…
A: We have given that Suppose the scores, on a college entrance examination are normally distributed…
Q: A veterinary researcher takes an SRS of 60 horses presenting with colic whose average age is 12…
A: Option b is the correct answer.
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A: Given: Mean μ = 500 Standard deviation σ = 170 Sample size n = 40 Sample mean X = 526 Formula used:…
Q: The time it takes for a statistics professor to mark a single midterm test is normally distributed…
A: n = 55
Q: Suppose the weight of an adult male Labrador is normally distributed with u=71.2 pounds and a…
A: Mean()=71.2standard deviation()=3.4
Q: The age at which a given disease occurs in children is normally distributed with a mean of 10 years…
A: From the provided information, Mean (µ) = 10 Standard deviation (σ) = 1.5 X~N (10, 1.5)
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A:
Q: Suppose that in a large population of women (aged 20 to 29-years-old) that the mean serum…
A: It is required to find the probability that a sample of 60 women aged 20 to 29-years-old from the…
Q: the life of a certain brand of car stereo is normally distributed with a mean of 5.2 years and a…
A: According to the given information in this question, we need to find the following probability
Q: According to a study done by UCB students, the height for Martian adult males is normally…
A: Find the probability that the person is between 65.1 and 66.4 inches? Let X = height of the…
Q: A random sample of 64 is taken of the height of college students. This population has mean 68 inches…
A:
Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.7 and a standard…
A: It is given that the IQ score follows normal distribution with mean 104.7 and standard deviation…
Q: Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…
A: Given that : Mean =100 Standard Deviation =15 We have to find the probability a random person has an…
Q: ading pr e probab r interme
A: The information provided in the question are as follows :- Population mean (μ)=500 Population…
Q: A particular fruit's weights are normally distributed, with a mean of 448 grams and a standard…
A:
Q: For a standardized psychology examination intended for psychology majors, the historical data snow…
A: As the sample size is higher than 30, the distribution can be assumed as normal (as per the central…
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A: Given that Mean = 515 Standard deviation = 170 Sample size = 35
Q: The annual salary for an emergency room nurse is a normally distributed random variable with a mean…
A: Mean()=80000standard deviation()=12000sample size(n)=36
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A:
Q: suppose the walking step lengths of an adult males are normally distributed with a mean of 2.7 feet…
A: Given that Mean=μ=2.7 Standard deviation=σ=0.3 Sample size=n=70 X~Normal(μ=2.7,σ=0.3)
Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.1 and a standard…
A: Answer:- Given, IQ scores(X) are normally distributed with mean, μ = 98.1 and standard deviation, σ…
Q: Suppose that the distribution for total amounts spent by students vacationing for a week in Florida…
A: Answer:- Given X ~ N(μ, σ ) Where mean μ = 650 & standard…
Q: Suppose X is a normally distributed random variable with a mean of 9.00. If the probability that X…
A: Obtain the value of the standard deviation of X. The value of the standard deviation of X is…
Q: Suppose the number of movies people rent per month is normally distributed with a mean of 4.8 and a…
A: Let x be the number of movies people rent per month which follows normal distribution with mean 4.8…
Q: The annual salary for an emergency room nurse is a normally distributed random variable with a mean…
A: Suppose the random variable x defines the annual salary for an emergency room nurse.
Q: Suppose that heights of women at UT Tyler are normally distributed with a mean of 64 inches and a…
A: It is given that the mean is 64 and standard deviation is 2.4.
Q: A study shows that the intelligence quotient (IQ) of adults in a country follows a normal…
A: Given,mean(μ)=90standard deviation(σ)=4.5
Q: A government sample survey plans to measure the total cholesterol level of an SRS of men aged 20-34.…
A: Note: As it is not logical that “the probability that x falls within + or -2 milligrams per…
Q: The scores on a certain test are normally distributed with a mean score of 65 and a standard…
A: The random variable score follows normal distribution. The population mean is 65. The population…
Q: A recent study was conducted and it found that IQ's are normally distributed with a mean or 100 and…
A: Given information, μ=100σ=15
Q: If X is a random variable with a mean of 20 and a standard deviation of 5, what is the probability…
A: From the provided information, Mean (µ) = 20 Standard deviation (σ) = 5
Q: Find the probability that a randomly selected adult has an IQ greater than 136.4
A: Let X denote the IQ scores of adults. Given that X follows N(mean = 101.3, SD = 20.2), then Z = (X…
Q: For a standardized psychology examination intended for psychology majors, the historical data show…
A: μ = 505σ = 170n= 40P(x¯≥528) = ? here n>30, as per CLT sampling distribution will be normal.…
The distribution of the scores on a certain exam is N(50,5),which means that the exam scores are
Using the Empirical Rule, the probability that a randomly selected score will be less than 40 is about ___%.
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 3 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- Suppose the number of items you can deliver in a day is a random variable with some unknown distribution with a mean of 35 and a standard deviation of 8. What is the probability a random sample of 36 days would have a mean greater than 37.08?A certain brand of car tends to break down on average after 115,000miles with a standard deviation of 4800 miles. If 36 cars of this brand are sampled,find the probability that their average breakdown mileage is less than 113,500miles. a. 0.0301 b. 0.3783 c. 0.6217 d. 0.9699For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 515 and a standard deviation of 170. The grading process of this year's exam has just begun. The mean score of the 35 exams graded so far is 518. What is the probability that a sample of 35 exams will have a mean score of 518 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
- In 2000, the average height of a woman aged 20-74 years was 64 inches with an increase of approximately 1 inch from 1960. Suppose the height of a woman is normally distributed with a standard deviation of two inches. • What is the probability that a randomly selected woman in this population is between 64 inches and 70 inches? • What is the probability that one woman selected at random from this population all exceed 70 inches? O a. NONE Ob.0.9973, 6.0042 x 10-9 Oc 0.0973, 0.0228 Od.0.4987, 0.0013Suppose X is a normally distributed random variable with a mean of 9.00. If the probability that X is less than 9.66 is 0.67, then what is the standard deviation of X?For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 515 and a standard deviation of 175. The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 518. What is the probability that a sample of 40 exams will have a mean score of 518 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places. Sub Continue
- For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 515 and a standard deviation of 175. The grading process of this year's exam has just begun. The average score of the 35 exams graded so far is 526. What is the probability that a sample of 35 exams will have a mean score of 526 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places: Round your answer to at least three decimal places. Submit Assignment 2021 McGraw Hil LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility US Continue V O 8:19 hp esc 2# 8. 3 4. t 00Assume that adults have IQ scores that are normally distributed with a mean of 103.9 and a standard deviation of 16.5. Find the probability that a randomly selected adult has an IQ greater than 132.4The MPG (miles per gallon) for a certain compact car is normally distributed with a mean of 30 and a standard deviation of 1. What is the probability that the MPG for a randomly selected compact car would be less than 28?
- The test score of a physics class with 160 students is distributed normally with a mean of 75 and standard deviation of 7. what percentage of the class has a test score between 68 and 82 Approximately how many students have a test score between 61 and 89? What is the probability that a student chosen at random has a test score between 54 and 75? Approximately how many students have a test score greater than or equal 96?Assume that IQ scores of Red Sox fans are normally distributed with the mean of 63.6 in a standard deviation of 2.5 if 90 Red Sox fans are randomly selected by the probability that they have a mean IQ score of 62.9 and 64.
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)
![A First Course in Probability (10th Edition)](https://www.bartleby.com/isbn_cover_images/9780134753119/9780134753119_smallCoverImage.gif)
![A First Course in Probability](https://www.bartleby.com/isbn_cover_images/9780321794772/9780321794772_smallCoverImage.gif)