Amber’s raw score on the Self-Control scale was 12. For the population, scores are normally distributed with µ = 22 and σ = 4. Amber’s psychologist wants to convert the raw self-control score into a T-score. What would Amber’s T-score be?
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The distribution of scores on the SAT is approximately normal with µ = 500 and σ = 100. What proportion of the population would have SAT scores above 650?What is the minimum SAT score needed to be in the highest 20% of the population?
QUESTION 4 Scores in a population are normally distributed with a mean of 50 and a standard deviation of 2. What is the mean of the distribution of sample means for samples of size N = 25? a. 0.40 b. 2 c. 4.38 d. 50 QUESTION 5 Scores in a population are normally distributed with a mean of 50 and a standard deviation of 2. What is the standard deviation of the distribution of sample means for samples of size...
1. The scores on a nationwide aptitude test are normally distributed, with a mean of 80 and a standard deviation of 12. (convert raw score to z score) a. What percentage of aptitude scores are below a score of 65?
At a local university, your application will only be considered if you score in the top 75% of all SAT scores (better than at least 25% of the population). You score 428 on your SAT. You know that SAT scores are normally distributed, have µ = 500, and σ = 100. Based on this information, do you need to retake the test? (1 point)
The population of scores on the SAT is normally distributed with a µ = 500 and σ = 100. If you were to take a random sample of 48 students who had taken the SAT, what are the chances that their mean would be less than 520?
Scores on an endurance test for cardiac patients are normally distributed with µ= 254 and σ =18. A) What is the probability a patient will score above 272? B) What percentage of patients score below 218? C) What score does a patient at the 78th percentile receive?
Assume that all SAT scores are normally distributed with a mean µ = 1518 and a standard deviation σ = 325. If 100 SAT scores (n = 100) are randomly selected, find the probability that the scores will have an average less than 1500. TIP: Make the appropriate z-score conversion 1st, and then use Table A-2 (Table V) to find the answer. Assume that all SAT scores are normally distributed with a mean µ = 1518 and a standard deviation...
7. Unfortunately, Henry was in a motorcycle accident in which he suffered a serious head trauma. Dr. Gatz, a neurological psychologist, is giving Henry several cognitive tests to help determine if specific neurological pathways were damaged by the accident. For the first test, Henry had to listen to lists of words and then repeat them back. Dr. Gatz recorded how many words Henry could hear and then repeat back correctly. The adult population can repeat back an average of 7...
In a large economics class, the professor announced that the scores of a recent exam were normally distributed in a domain from 51 to 87. Using the Empirical Rule on µ ± 3σ to estimate σ (that is, σ=[upper limit-lower limit]/6), how many students would you need to sample in order to construct a 90 percent confidence interval of the population mean score with an allowable error of ± 2? (Hint: use the critical value Z0.05=1.645 for a 90 percent...
A distribution with µ = 55 and σ = 6 is being standardized so that the new mean and standard deviation will be µ = 50 and σ = 10. When the distribution is standardized, what value will be obtained for a score of X = 58 from the original distribution? a.58 b.55 c.61 d.53 On an exam with μ = 52, you have a score of X = 56. Which value for the standard deviation would give you the...