The scores on a psychology exam were normally distributed with mean of 55 and a standard...
The scores on a psychology exam were normally distributed with a mean of 62 and a standard deviation of 9. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 44. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)
The scores on a psychology exam were normally distributed with a mean of 58 and a standard deviation of 6. A failing grade on the exam was anything 2 or more standard deviation below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was ____ Simplify answer) Approximately ___ percent of the students failed ( Round to one decimal place as needed)
The scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation of 8. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was______? (Simplify your answer)
The scores on a psychology exam were normally distributed with a mean of 55 and a standard deviation of 9. What is the standard score for an exam score of 41? The standard score is . (Round to the nearest hundredth as needed.)
Problem 3: Scores on an exam are assumed to be normally distributed with mean /u = 75 and variance a2 = 25 (1) What is the probability that a person taking the examination scores higher than 70? (2) Suppose that students scoring in the top 10.03% of this distribution are to receive an A grade. What is the minimum score a student must achieve to earn an A grade? (3) What must be the cutoff point for passing the examination...
The scores on a Statistics exam are normally distributed with a mean 75 with a standard deviation of 5. If nine students are randomly selected what is the probability that their mean score is greater than 68. (a) .0808 (b) -.4000 (c) .9192 (d) .0001 (e) .9999 29. Refer to question 28. Suppose that students with the lowest 10% of scores are placed on academic probation, what is the cutoff score to avoid being placed on academic probation? (a) >...
The scores of students on an exam are normally distributed with a mean of 225 and a standard deviation of 38. (a) What is the lower quartile score for this exam? (Recall that the first quartile is the value in a data set with 25% of the observations being lower.)
Scores for an exam are normally distributed with a mean of 235 and a standard deviation of 52. What is the percentile value of a score of 270? Round your score to TWO decimal places. For example, if you compute a value of .547, you would enter .55. ALSO: Please enter ONLY the value, no equals sign, no words, etc.
Scores on a recent national statistics exam were normally distributed with a mean of 88 and a standard deviation of 2. 1. What is the probability that a randomly selected exam will have a score of at least 85? 2. What percentage of exams will have scores between 89 and 92? 3. If the top 5% of test scores receive merit awards, what is the lowest score eligible for an award? I do not understand how to compute probability.
Normally distributed scores on Social Psych Final Exam had a mean of 235 and a standard deviation of 52. What is the minimum score needed to be in the highest 10%? Round to the nearest whole number.