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# Percentile

### Percentile Rank Change

Millie and Senta Meter have recently taken Pre and Post test in achievement. The test were normally distributed. Millie's percentile rank changed from 57.93 to 77.34. Senta's changed from 1.07 to 4.95. Which of the following states is correct. A. Millie improved more the Senta. B. Senta improved more then Millie. C. T

### Percentile Ranking Statistics

Subject: percentile ranking Details: Refer to the science scores of the 12 students below: 75 80 68 53 99 58 76 73 85 88 91 79 Find the percentile rank for the score 85. Give a brief interpretation of this percentile rank.

### Probability, Upper and Lower Limit Scores

In a normal distribution with mean 30 and variance 25, at what percentile rank does a score of 42 fall? Among twenty-five articles, nine are defective, six having only minor defects and three having major defects. Determine the probability that an article selected at random has major defects given that it has defects. In a

### Corresponding percentile of a z value

True or false. The z-value which corresponds to the 18th percentile is z = -0.92.

### Computation of percentiles

A student took two exams and achieved the 7th highest grade on each of them. Forty three students took one of the tests(Math) and 197 students took the other test(Geography). Compare his performance on the two tests in terms of percentile ranks. In which exam did he do better? Please show computations and explain.

### Computation of percentiles in frequenncy distributions

On a paper and pencil measure of self-esteem, subjects in an experiment received the following scores: 113 131 138 145 154 116 131 138 145 155 119 132 138 146 156 119 133 140 146 157 121 134 140 148 163 125 134 141 150 167 129 134 141 151 129 135 142 152 130 137 143 141 What is the percentile rank of score 15