The mean is 38.70 with an SD of 6.31. What score falls at the 11 th percentile?
The mean is 38.70 with an SD of 6.31. What score falls at the 11 th...
The mean is 60 with an SD of 15. What is the probability of selecting at random a score that falls between 55 and 65?
Given that standardized IQ scores are normally distributed (mean=100, sd=15), if John gets a score of 130, that means that his scores are approximately in the _____ percentile.
In recent years, SAT scores are approximately normal with a mean of 1100 and a SD of 130, while ACT scores are also approximately normal with a mean of 22 and a SD of 6.5. Without any studying, you took both tests and scored 1250 on the SAT and 24 on the ACT.Did you do better on the SAT or the ACT? Make sure to find the percentile (what percent of the test takers scored lower than you?) of each...
9] Suppose X is Normal random variable with mean 10 and SD 4. What is the probability that X is between 7 and 13? [10] Suppose X is Normal random variable with unknown mean mu and SD 4. For what value of mu, 80th percentile of X will be 23? (11] Lifetime of Carbon 14, X, is modeled by Exponential distribution with mean of 8223.7 years Determine its half-life (50th percentile).
For a normal distribution with mean of 70 and sd 10, what is the minimum score necessary to be in the top 60% of the distribution?
In a normal distribution of = 50 and SD = 7: What is the score at the 75th percentile (hint: on the table, find the z-score at .750 and change back to a raw score)? Find the percent of cases scoring above 55. Between what scores to the middle 25% of the cases lie? Beyond what scores do the most extreme cases lie?
Percentile rank. Describe in c) Construct a ten-score dataset such words what it means for a score to of 92 falls into the 70h Percentile. Use the oue be in %ile Rank =1 B+ 호 E |.100% a) the 85th Percentile. h) the 16th Percentile.
Percentile rank. Describe in c) Construct a ten-score dataset such words what it means for a score to of 92 falls into the 70h Percentile. Use the oue be in %ile Rank =1 B+ 호...
(1 point) Consider a normal distribution curve where 60-th percentile is at 11 and the 25-th percentile is at 1. Use this information to find the mean, , and the standard deviation, o, of the distribution a) = 10/0.92 b) =
Suppose that student’s z score is 3.00 what does this mean? discuss in terms of units of standard deviation It means the value defined by z-score is 3 standard deviations away from the mean value. Discuss in terms of its percentile score. In terms of percentile score, its mean amount of data lies below the value. Z=3 represent the 99.87 the percentile. 4. How does this student’s z score differ from another student whose z score is -3.00 5. If...
11. Scores on a national exam are normally distributed with mean 382 and standard deviation 26. Find the score that is the 50th percentile. b. Find the score that is the 90th percentile. a.