If the scores follow normal distribution with the mean of 84 and a standard deviation of 7, find probability that randomly selected score is between 75 and 82.
Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…
A: Formula : Let , mean = μ and standard deviation = σ The test score below 'a' standard deviation of…
Q: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…
A: The formula for z-score is z = x - μσ where μ is the mean and σ is the standard deviation.…
Q: A student has taken a 50-point exam and wants to know how his score of 38 compares to the scores of…
A: It is given that Mean = 40 Standard deviation SD = 4 Score X = 38
Q: You are to write down on a piece of paper the number of credits you are taking this semester. Your…
A: Give the general format for solving this problem as below. Summarize the recorded date of number of…
Q: Assume that the blood pressure data is normally distributed with a mean of 70.2 and a standard…
A: The variable x¯ is defined as the mean blood pressure levels. The sample size is 16, mean is 70.2,…
Q: Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard…
A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100 and standard…
Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…
A:
Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…
A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…
Q: Scores for a standardized test are normally distributed with a mean of 1200 and a standard…
A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?
Q: The scores on a standardized test are normally distributed with a mean of 95 and standard deviation…
A: Given that, The scores on a standardized test are normally distributed with, Mean = 95 Standard…
Q: if a student scored 88 points on a test when the mean score was 80.2 and the standard deviation was…
A: From the provided information, Mean (µ) = 80.2 Standard deviation (σ) = 5.7
Q: Suppose you have a test with a mean of 66 and a standard deviation of 5. If you first increase…
A: Given Mean =66 Standard deviation=5
Q: The test scores are normally distributed with a mean of 78 and a standard deviation of 9. If 39…
A: Obtain the probability that the average score is between 80 and 84. The probability that the average…
Q: The scores on a test are normally distributed with a mean of 110 and a standard deviation of 22.…
A: Let X be the random variable from Normal distribution with mean (μ) = 110 and standard deviation (σ)…
Q: Determine the number of standard deviations from the mean (z-score). In the United States, the…
A: Given mean female height = 64 inches and standard devaiton = 3 inches.The distance of a data point…
Q: The average score of all golfers for a particular course has a mean of 76 and a standard deviation…
A: We have given information with the usual notation, Let X denote the score of golfers for a…
Q: When Noah goes bowling, his scores are normally distributed with a mean of 135 and a standard…
A: Let X be the Noah goes bowling, his scores are normally distributed mean μ=135, standard deviations…
Q: ores are normally distributed with a mean of 1518 and a standard deviation of 325. If 1 SAT score…
A: Given: μ=1518, σ=325 The corresponding z-value needed to be computed is: If 1 SAT score is randomly…
Q: Assume that blood pressure readings are normally distributed with a mean of 125 and a standard…
A: Solution: Let X be the blood pressure. From the given information, X follows normal distribution…
Q: her wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10% will be…
A: given: mean(μ)=78 sd(σ)=8
Q: The final exam is worth 200 points with the usual 10% grading scale. Assume that the final exam…
A: Given Information: Mean (u) = 161 points Standard deviation (s) = 22
Q: Assume that blood pressure readings are normally distributed with a mean of 123 and a standard…
A:
Q: In a normal distribution, mean is 60 and standard deviation is 5. How many of the cases have scores…
A: The probability between two specific numbers a and b in a normal distribution with mean μ and…
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A:
Q: The average score of all golfers for a particular course has a mean of 75 and a standard deviation…
A: Let is denote X=the score of a golfern=sample size=81X has mean=75 and standard deviation=4.5So, X¯…
Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…
A:
Q: The average score of all golfers for a particular course has a mean of 64 and a standard deviation…
A:
Q: at is the probability that you could randomly
A: mean = 112.5 standard deviation = 16.4 What is the probability that you could randomly select a…
Q: Find the probability that a randomly selected year of rain in Sydney, Australia has a yearly…
A: Given Population mean μ=137, population standard deviations σ=69, Let X be the rain in Sydney Note:…
Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 30.…
A: ∗Mean μ=190 standard deviation σ=30 X~N 190,30 we need to find, PX<130+PX>250=P…
Q: Assume that women's weights are normally distributed with a mean given by mean=143 lb and a standard…
A:
Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…
A: Let x denote the length of pregnancies. Given that the lengths of pregnancies are normally…
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A: GivenMean(μ)=1457standard deviation(σ)=315
Q: For the students in a school for gifted children, scores of IQ test are normally distributed with a…
A: Given,sample size(n)=36 mean(μ)=114standard deviation(σ)=18
Q: Brenda has collected data to find that the finishing times for cyclists in a race has a normal…
A: Given the finishing time for cyclists in a race has normal distribution with mean 143 minutes and…
Q: Assume that math test scores are normally distributed with a mean of 400 and a standard deviation of…
A:
Q: A local firm reported that an American family of four washes an average of 2000 pounds of clothes…
A:
Q: Layla earned a score of 140 on Exam A that had a mean of 200 and a standard deviation of 50. She is…
A: Given : Score on exam A = X = 140 mean of X = 200 standard deviation of X = 50. Score on exam B…
Q: Assume that the test scores for a large class are normally distributed with a mean of 64 and a…
A: Solution-: Given: We find P(the class received a higher score than 78)=?
Q: Scores on the SAT test have a mean of 1518 and a standard deviation of 325. If 100 students are…
A: Scores on the SAT test have a mean of 1518 and a standard deviation of 325.
Q: Christian earned a score of 80 on Exam A that had a mean of 200 and a standard deviation of 40. He…
A: Here we need to compute the marks Christian must obtain in exam B such that it's equivalent to exam…
Q: The average score of all golfers for a particular course has a mean of 71 and a standard deviation…
A: Solution: Let X be the score of golfer for a particular course. From the given information, X has a…
Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…
A: Solution: Let X be the time a patient of a medical center spends waiting for an appointment. From…
Q: the mean IQ of tweleve year old boys in a school district is 118; the standard deviation is 18. if a…
A: Obtain the probability that the mean of the sample is greater than 120. The probability that the…
Q: The national average SAT schore was found to be a 2140 with a standard deviation of 892. If the…
A:
If the scores follow
find probability that randomly selected score is between 75 and 82.
Step by step
Solved in 2 steps with 2 images
- Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation 20. Find Upper P 4 which is the IQ score separating the bottom 44% from the top 96%.The golf scores for a school team were normally distributed with a mean of 68 and a standard deviation of three.Find the probability that a golfer scored between 66 and 70The amount of time spent by customers in a store follows a normal distribution with a mean of 30 minutes and a standard deviation of 5 minutes. What is the probability that a randomly selected customer spends between 25 and 35 minutes in the store? The IQ scores of a population follow a normal distribution with a mean of 100 and a standard deviation of 15. What percentage of the population has an IQ score between 85 and 115?
- Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find P25, which is the IQ score separating the bottom 25% from the top 75%. Round your answer to nearest tenth.The scores on a standardized test are normally distributed with a mean of 115 and standard deviation of 20. What test score is 2.2 standard deviations above the mean?In a sample distribution, a score of x = 21 corresponds to z = -1.00 and a score of x = 12 corresponds to z = -2.50. Find the mean and standard deviation for the sample
- A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1471 and the standard deviation was 317. The test scores of four students selected at random are 1900,1200,2200,and 1370. Find the z-scores that correspond to each value and determine whether any of the values are unusual.a normal distribution has a mean of 25 and standard deviation of 5. what score separates the lowest 30% of the distribution from the rest of the scores?Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find P40, which is the IQ score separating the bottom 40% from the top 60%. Round your answer to nearest tenth.
- Assume that blood pressure readings are normally distributed with a mean of 116 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 118. Round to four decimal places.The average score of all golfers for a particular course has a mean of 78 and a standard deviation of 5. Suppose 100 golfers played the course today. Find the probability that the average score of the 100 golfers exceeded 79, rounding to four decimal places.Caleb earned a score of 38 on Exam A that had a mean of 76 and a standard deviation of 20. He is about to take Exam B that has a mean of 150 and a standard deviation of 40. How well must Caleb score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
