Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What was his percentile?

Q: Helga scored in the 70th percentile rank on an exam. If 300 students took the exam, how many…

A: Given: percentile rank of Helga: 70th           total number of students who took exam: 300 students…

Q: Find the z-score that cuts off 65% in the body on the left.

A:

Q: Alex is 80th in his class of 320 students. What is his percentile rank in class?

A: Data given p=80, n=320

Q: On a reading examination given to 900 students, Elaine’s score of 602 was higher than the scores of…

A: Solution

Q: Jesse was ranked 36th in his graduating class of 180 students. At what percentile is Jesse's…

A:

Q: M= 90 SD= 7.8 What raw score is needed to be in the top 8%?

A: *Mean μ=90SD σ=7.8Top 8%⇒P(X>x)=0.08⇒P(X≤x)=092Corresponding  z-score is obtained as

Q: Howard scored in the 55th percentile rank on an exam. If 400 students took the exam, how many…

A: Note:Hi there! Thank you for posting the question. To avoid plagiarism issues, we have used the…

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: Find the z-score that corresponds to the 63rd percentile

A: we have to find the Z-score that corresponds tothe 63rd percentile.

Q: In a class of 10 students, James got 3rd position from the lowest. What is his percentile rank?

A: Given data: In a class of 10 students, James got 3rd position from the lowest. To find: What is his…

Q: Rene scored at the 84th percentile on a test given to a 12600 students . How many students scored…

A: Given percentile of Rene=84

Q: Helen scored in the 85th percentile of the IQ test. What was her raw score? M=100    s=15

A: Given, Helen scored in the 85th percentile of the IQ test. Mean , M=100 and Standard deviation, s…

Q: Find the correlation between MSFT and Apple.

A: The data is given about MSFT and Apple.Suppose MSFT return is the independent variable (x) and Apple…

Q: On a reading test, Shaylen's score of 455 was higher than the scores of 4278 of the 7274 students…

A: We have given a reading test score of Shaylen's = 455 Number of students who got less than 455 =4278…

Q: Which is the best estimate for the number who bought fewer than 20 items during their trip? Rel f…

A: The histogram shows the number of items that customers bought during a trip to the grocery store one…

Q: Celyn is among the 1500 students of the school.If Celyn's score based on the Standard-Binet test is…

A: Given: Number of students = 1500 Score on standard Binest test is 105

Q: A student completed an exam and their z score was -1.57. What percentage of students did better on…

A: We know that Z-score = (x - mu)/sigma  mu= 0 , sigma =1   X~N( 0,1)

Q: Eric scored 107 on the IQ test. What is his exact percentile rank? M=100    s=15

A: Given, Mean, M=100 Standard deviation, S =15

Q: The NAEP music assessment scores for eighth grade students are approximately N (150, 35). Find the…

A: Given data: Let , X ~ N (150, 35) To find: 1.Find the z-scores by standardizing the following…

Q: During the scholarship examination of a certain scholarship grant taken by 10,000 applicants,…

A: Given : Annabelle score (x) =350total number of applicant =10000Number of rank below x =8995

Q: 350 students took a standardized test, Sarah’s score was ranked at the 7th. What was the percentile…

A: that is (7×100)/350=700/350 =2

Q: What percentage of the scores are in the shaded area?

A: It is given that the shaded area in graph.

Q: Find the z score for the 55th percentile.

A: Percentile= 55th  = 0.55 P(Z=z)= 0.55

Q: Marshall took the SAT ( μ=1010,σ=200) and had a raw score of 950. What was his z-score? What was…

A: Given data,  μ=1010 σ=200 Raw score X=950

Q: Nationally 58.3% of federal prisoners are serving time for drug offenses. A warden feels that in his…

A: The null and the alternative hypotheses are, H0: p=0.583 (The proportion of prisoners serving time…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.