The test scores are normally distributed with a mean of 78 and a standard deviation of 9. If 39 scores are randomly selected, find the probability that the average score is between 80 and 84.

Q: The average score of all golfers for a particular course has a mean of 76 and a standard deviation…

A:

Q: In a college class, the average IQ is 115. Assume that the distribution is normal and that the…

A: In a college class, the average IQ is 115. Assume that the distribution is normal and that the…

Q: Activity 2 of 3 What percent of Braves players fall between 230 and 270? O A. 95.4% O B. 47.7% O C.…

A: Answer Option c = 68.2% is correct

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: ample of 3000 persons were surveyed for their walght in pounds, the mean weight is 135 lbs with a…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 105 and a…

A: Given information-We have given that adults have IQ scores that are normally distributed.μ= 105σ =…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 105 and a…

A: Obtain the Z-score for the random variable X equals 129. The Z-score for the random variable X…

Q: Reading scores. The grade-level reading scores from a reading test given to a random sample of 12…

A: From the provided information, Sample size (n) = 12

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: Temperatures in a city are distributed approximately normal, with a mean of 69 degrees Fahrenheit…

A:

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: Convert score 46 to z-score if the mean is 40 and the standard deviation is 4.

A: The definition of a z-score is:   z = (X - μ) / σ

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: William revealed that he makes 1,000,000 dollars annually. The average annual income in the country…

A:

Q: A normal distribution is observed from the body weights of the forty students in a class. If the…

A: Given information Mean (µ) = 125 Standard deviation(σ) = 9 As per empirical Rule 68% falls within…

Q: 5. 2.1, 4.6, 8.2, 3.4, 5.6, 8.0, 9.4, 12.2, 56.1, 78.2

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: Assume that women's weights are normally distributed with a mean given by mean=143 lb and a standard…

A:

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: 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: Assume that adults have IQ scores that are normally distributed with a mean of u = 105 and a…

A: Given information Mean µ = 105 Standard Deviation σ = 15

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and standard deviation (σ)…

Q: The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 80…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 105 and a…

A: Mean()=105standard deviation()=15

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the…

A: Reviewing information, Given, X : Individual's IQ score X~N(μ=100 , σ=15)

Q: The average score of all golfers for a particular course has a mean of 74 and a standard deviation…

A:

Q: The average score of all pro golfers for a particular course has a mean of 70 and a standard…

A: It is given that, The average score of all pro golfers for a particular course has a mean of 70 and…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u 105 and a standard…

A: Given that, Mean = 105 and Standard deviation = 15

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A:

Q: Karen scored a 76 on an exam whose mean is 74 and whose standard deviation is 8. Find her z score.

A: