The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister scored an 75, what is her z-score?
Q: On a nationwide math test, the mean was 51 and the standard deviation was 4. If Roberto scored 70,…
A:
Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…
A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…
Q: The mean of a set of data is 108.06 and its standard deviation is 115.45 What is the z score for a…
A: Z-score = 3.3045 answer.
Q: The mean and standard deviation of players' heights for the 2003 NBA season were H 79.5 inches and o…
A: A z-score (also called a normal score) gives an indication of how far from the mean a data point is.
Q: Molly injured her ankle 12 weeks ago. Each week, her physical therapist has been recording her pain…
A: The given information is that Molly’s pain scores’ follows normal distribution with mean 60 and…
Q: Todd just got back his exam grades in three classes. In biology the class mean was 75.80 with a…
A: Consider X as the random obtained score in Biology, Political Science or Economics. For comparing…
Q: On a standardized examination, Laura received a score of 83, which was exactly 2 standard deviations…
A:
Q: Greg is in his first semester at a university and is taking a calculus course with a large…
A:
Q: The chloride concentration in the blood (mmol / liter) averages 104 with a standard deviation of 5.…
A: Given Data: Let X represent the random variable X~ Normal (104, 52) n=200 Therefore, X¯ ~ Normal…
Q: In a given school year, the ACT test mean score was 21 with a standard deviation of 4.9. The same…
A:
Q: On a nationwide math test, the mean was 63 and the standard deviation was 10. If Roberto scored 85,…
A: GivenMean(μ)=63standard deviation(σ)=10score(x)=85
Q: The median score on a test was 80% with a standard deviation of 5%, what does that tell you about…
A: Central tendency is used to determine the average of the data set. Dispersion is used to determine…
Q: Justin got a score of 85 on an GE MMW examination for which the mean is 75. Justin realized that the…
A: Considering the mean score in the specified examination as μ and variance of scores in the…
Q: Suppose you were told you scored two standard deviation below the mean on a measure where the main…
A:
Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…
A: From the given information, Mean = 3.6 Standard deviation = 0.3 The objective is to find the…
Q: Sophia's final exams have an average of 78 and a standard deviation of 6. If she wants 4% of her…
A:
Q: You want to know the percentage of utility companies that earned revenue less than 39 million or…
A: Given data You want to know the percentage of utility companies that earned revenue less than…
Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…
A:
Q: On a nationwide math test, the mean was 52 and the standard deviation was 4. If Roberto scored 85,…
A: The z score formula is,
Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…
A:
Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 70,…
A: Given that,Mean = 72Standard deviation = 7And X=70
Q: The mean of a test score was 21.2 and the standard deviation was 5.1 . Identify the rest scores that…
A: Given Data Mean µ= 21.2. Standard Deviation σ= 5.1. Assuming that the given data is obtained from a…
Q: Sarah'sscore on the Stats midterm was 81 points. The class average was 76 and the standard…
A: Given that Mean = 76 SD = 5 And the Sarah's score is X = 81
Q: A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. What…
A: Let us define the random variable , X. Let X represent the final exam scores. Here X follows Normal…
Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…
A: Given data, Mean=27 sd=12 z=-2 x=?
Q: On a nationwide math test, the mean was 51 and the standard deviation was 4. If Roberto scored 85,…
A: We have given the mean and standard deviation of a nationwide math test.Mean μ = 51Standard…
Q: he mean on an exam is 80 with a standard deviation of 5 points. If Joe scored a 90 on the exam, what…
A: given data, μ=80σ=5x=90 z score for the given data=?
Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…
A: Given that, Mean = 72 Standard deviation = 7
Q: Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte scored a 688…
A: HERE GIVEN , Ava scored a 92 on a test with a mean of 71 and a standard deviation of 15. Charlotte…
Q: 2. Consider the familial aggregation of cholesterol levels. Suppose cholesterol levels are assessed…
A: To test for the equality of the mean cholesterol levels of the two groups using R, we can perform an…
Q: 5 points on his st. The mean was 70 standard deviation atively better on thein
A:
Q: Pattys final exams have an average of 78 and a standard deviation of 6. If she wants 4% of her…
A: X follows a Normal distribution with mean = 78 and S.D = 6 Then z=(x-mean)/SD = (x-78)/6 follows…
Q: Abby's score of 704 on the math portion of the 2002 GRE exam placed her in the 84th percentile rank.…
A: given data Abby score x = 704 84th percentile σ = 141μ = ?
The
Step by step
Solved in 2 steps
- On a nationwide math test, the mean was 57 and the standard deviation was 4. If Roberto scored 90, what was his z-score?What would a histogram look like if the mean is 50 the median is 50 and the standard deviation is 1.6?Many students did an exam, the mean was 15 and the standard deviation was 32 The highest mark was X= 103, What is the zscore of the highest mark?
- On a verbal skill test, the mean was 72 and the standard deviation was 7. If John scored 75, what was his z-score?The distribution of the scores on a standardized exam is approximately normal with mean 400 and standard deviation 35. Between what two values do the middle 50% of scores lie? Round to the nearest whole number. Write you answers with comma between them.The first exam for a Stats course had a mean of 80 and a standard deviation of 4 points; the second had a mean of 70 and a standard deviation of 15 points. Reginald scored an 80 on the first test and an 85 on the second. Sara scored an 88 on the first but only a 65 on the second. Although Reginald's total score is higher, Sara feels she should get the higher grade. Explain her point of view.
- The local pilots association examined records from this year's census of its members. Tom is a member, and the census shows that he has 4210 hours of flight experience. The census also shows that among all members of the association the mean flight experience is 3095 hours with a standard deviation of 679 hours. Find the z-score of Tom's flight experience relative to the flight experiences of all the members of the pilots association. Round your answer to two decimal places.What percentage of the widget Weights lie between 55 and 79 ounces when the mean is 61 and the standard deviation is 6 ?kamal is in his first semester at a university and is taking a calculus course with a large enrollment. He just took the first midterm exam and is nervous about his score. Among all the students in the course, the mean of the exam was 65 with a standard deviation of 9. Greg scored a 94 on this exam. Find the z-score of Greg's exam score relative to the exam scores among all the students in the course. Round your answer to two decimal places.
- Max scored an 80 on her psychology quiz, but the class as a whole averaged a 40. If the standard deviation was 10, what was Alicia's z-score?Carla scored a 31 on her ACT and an 750 on her SAT. If the mean and standard deviation for the ACT are 18 and 7, respectively; and the mean and standard deviation of the SAT are 500 and 150, respectively - what is her percentile rank on each exam? Percentile rank of ACT Percentile rank of SAT On which exam did she do better?The GMAC Insurance company reported that the mean score on the National Drivers Test was 77.8 with a standard deviation of 2.5 points. The test scores are approximately bell-shaped. Approximately 68% of all test scores were between two values A and B. What is the value of A? Write only a number as your answer. Round to one decimal place.
