A random sample of three students was selected and their study hours over last weekend were recorded. What is the standard deviation? 0 10 2 A. 18.7 B. 10.0 C. 5.3 D. 4.

Q: Naomi scores 39 on a test. The standard deviation is 6.00. Her z score is +1.5. What is the mean of…

A: given data x = 39 σ = 6z = 1.5μ = ?

Q: Find the following probabilities. It may help to sketch the pdf for Standard Normal Distribution and…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Test scores for a history class had a mean of 89 with a standard deviation of 8.9. Suppose a student…

A: According to the given information, we have Mean = 89 Standard deviation = 8.9 Raw score = 67

Q: Jeff is doing an experiment involving mice. The mice weights have mean weight 3.68 ounces and…

A:

Q: 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

A:

Q: Assume scores on an exam are normally distributed with a mean of 80 and a standard deviation of 5.…

A: It is given the mean and standard deviation are 80 and 5, respectively.

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: Justin got a score of 85 on an GE MMW examination for which the mean is 75. Justin realized that the…

A: Given:Here use the formula;here,  represents the value of Standard Daviation.

Q: A successful basketball player has a height of 6 feet 5 inch . Based on statistics from a data​ set,…

A: Given: z score = 2.58 The height of players in cm is 195.58 ≈196cm The formula to compute the…

Q: There is an average of 4 accidents in a week on a major highway in the city. What is the standard…

A:

Q: onsider this data set { 9, 3, 8, 8, 9, 8, 9, 18}. Find the standard deviation, s. Round off your…

A: given data, 9,3,8,8,9,8,9,18we have to find out the standard deviation(s) for the given data. x…

Q: art professor gives an A to any student in the top 9% of the distribution. The grades are normally…

A: Given X~N(mean μ=60, standard deviations σ=5) P(X>b)=9%

Q: H=34, o=4.5, the score is 2.5 standard deviations above the mean

A: Suppose the variable of interest is x.The mean is and the standard deviation is .

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: A successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: Smelt is a type of flood fish. Smelt lengths are normally distributed with a mean of 15 cm and a…

A: Given: µ = 15 σ = 1

Q: A successful basketball player has a height of 6 feet 3 inches, or 191 cm. Based on statistics from…

A: Since z-score is a measure of how far is the standard deviations away from the mean…

Q: 1.2, 2.7, 5.3, 3.4, 4.1,4.6, 3.3, 2.6. Find the standard  deviation

A:

Q: SAT tests have a mean of 500 and a standard deviation of 100. They are normally distributed. Amy got…

A: Given data normally distributed with mean = 500 and standard deviation = 100.Let ‘X’ be a normal…

Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

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

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

Q: Brian scored an 80% on a Chemistry Exam. The average on the exam was a 68%, with a standard…

A:

Q: Jeff is doing an experiment involving mice. The mice weights have mean weight 3.74 ounces and…

A:

Q: New employees at a company are given a proficiency test. The test scores are approximately normally…

A: X~N( μ , ?)μ=350     , ?=30Z-score =( x - μ )/?

Q: 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with…

A: Given information: MEan=75 Standard deviation=7

Q: The mean time it takes a group of students to complete a statistics final exam is 98 minutes, and…

A: We have to find 95% confidence interval limits..

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A: