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[DOC File]Z-Score Practice Worksheet
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A score of 60, where the mean score of the sample data values is 40. Z=2. A score that is 30 points below the mean. z=-3. A score of 80, where the mean score of the sample data values is 30. Z=5. A score of 20, where the mean score of the sample data values is 50. Z=-3. IQ scores have a mean of 100 and a standard deviation of 16.
z score for 99% confidence interval

[DOC File]Lecture 6 – Z scores
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Thus, a z-score of 1.5 is 1 ½ sd above the mean, and a z-score of –2 is 2 sd below the mean. sample z: population z: Examples: Suppose you took 3 midterm examinations in Math, English, and Biology, and you want to compare your scores: Math English Biology your score 90 85 93 Mean 85 82 94 Standard deviation 5 2 1 z-score 1.
99% confidence level z score

[DOC File]CHAPTER 2 REVIEW
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(b) The z-score that is corresponding 90% is 1.285. Thus, giving x = 73.205 in. (c) Since you want to know what the top 99% of scores would look like, the area to the left would be 0.01. That is, a z-score of z = -2.325. Thus, giving x = 64.185 in. (d) 68%, 95%, 99.7%, respectively.
z score 90 percent

[DOC File]Z-Score Practice Worksheet - Weebly
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Three students take equivalent stress tests. Which is the highest relative score (meaning which has the largest z-score value)? A score of 144 on a test with a mean of 128 and a standard deviation of 34. A score of 90 on a test with a mean of 86 and a standard deviation of 18. A score of 18 on a test with a mean of 15 and a standard deviation of 5.
z score table above 3.5

[DOC File]Z-Score Practice Worksheet
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3.4: Z-Score. A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: A score of 60, where the mean score of the sample data values is 40. A score that is 30 points below the mean. A score of 80, where the mean score of the sample data values is 30.
z value of 90

[DOC File]Sample Test Questions -- Test 1 - University of Florida
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C. The entry corresponding to z= -1.34 is 0.0901 (this is the probability less), so, this shows most of students’ scores (90%) are higher than you. C Z= (48-60)/12=-1 . B. Look the table A, the entry corresponding to the z-score is 0.1587. A. Unstandardize the z-score. X= 60+12*5.2=122.4. 122.4 is much larger than the mean( =60). B. Range ...
z score percentage

[DOC File]Exam 3 Practice Questions
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A Use the sampling distribution of the sample proportion that you used in problem 52 and the z-score. Look up 2.90 in the table. P(z< 2.90) = 0.9981. We want the probability that our sample proportion is greater than 0.10 so we take 1-0.9981=0.0019. B. n== n=1475.1. So n should be 1476 .
z score 80th percentile

[DOC File]Z-Score Practice Worksheet
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Three students take equivalent stress tests. Which is the highest relative score (meaning which has the largest z score value)? A score of 144 on a test with a mean of 128 and a standard deviation of 34. A score of 90 on a test with a mean of 86 and a standard deviation of 18. A score of 18 on a test with a mean of 15 and a standard deviation of 5.
90% confidence interval z score

[DOC File]Z-Score Practice Worksheet
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Oct 13, 2015 · A score of 90 on a test with a mean of 86 and a standard deviation of 18. A score of 18 on a test with a mean of 15 and a standard deviation of 5. 5. A population has a μ= 137 and 𝞂 = 17. What is the raw score corresponding to the following z-scores? …
z score for 99% confidence interval

[DOC File]Z-Score Practice Worksheet
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A score of 90 on a test with a mean of 86 and a standard deviation of 18. A score of 18 on a test with a mean of 15 and a standard deviation of 5. SOLUTIONS. Z-Score Practice Worksheet Name _____ A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values:
99% confidence level z score

Z score for 90