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What percent of the scores will fall between 1.22 and 8.78 Mean 5 Standard Deviation 1.41?
Wiki User
∙ 14y ago
Convert to Standard Normal Distribution the values of 1.22 & 8.78. Z = (8.78-5)/1.41 = 2.68; and Z = (1.22-5)/1.41 = -2.68. Find the area between 2.68 & -2.68 from Table. Area @ 2.68 = .9963; Area @ -2.68 = .0037. Take the difference in the areas and that is the solution. 0.9963 - 0.0037 = .9926 or 99.26% of the scores fall between 1.22 & 8.78.
Wiki User
∙ 14y ago
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When Mrs Myles gave a test the scores were normally distributed with a mean of 72 and a standard deviation of 8 About 68 percent of her students scored between which two scores?
68 % is about one standard deviation - so there score would be between 64 and 80 (72 +/- 8)
If the standard deviation of 10 scores is 0?
If the standard deviation of 10 scores is zero, then all scores are the same.
What percent of the scores in a normal distribution will fall within one standard deviation?
It is 68.3%
Mrssung gave a test in her trigonometry class the scores were normally distributed with a mean of 85 and a standard deviation of 3 what percent would you expect to score between 82 and 88?
67% as it's +/- one standard deviation from the mean
The standard deviation is the square root of the average squared deviation of scores from the?
mean
When Mrs Myles gave a test the scores were normally distributed with a mean of 72 and a standard deviation of 8 About 68 percent of her students scored between which two scores?
68 % is about one standard deviation - so there score would be between 64 and 80 (72 +/- 8)
If the standard deviation of 10 scores is 0?
If the standard deviation of 10 scores is zero, then all scores are the same.
What percent of the scores in a normal distribution will fall within one standard deviation?
It is 68.3%
Mean of 85 standard deviation of 3what percent would you expect to score between 88 and 91?
mrs.sung gave a test in her trigonometry class. the scores were normally distributed with a mean of 85 and a standard deviation of 3. what percent would you expect to score between 88 and 91?
Mrssung gave a test in her trigonometry class the scores were normally distributed with a mean of 85 and a standard deviation of 3 what percent would you expect to score between 82 and 88?
67% as it's +/- one standard deviation from the mean
What will happen if the difference between scores and the mean decreases?
The variance and the standard deviation will decrease.
Standard deviation of 10 and mean of 50 approximately 68 percent of the group members receive scores somewhere between?
Within 1 stdev of the mean - between 40 and 60.
If standard deviation of 10 scores is 0?
All the scores are equal
The standard deviation is the square root of the average squared deviation of scores from the?
mean
Is the variance of a group of scores the same as the squared standard deviation?
The standard deviation is defined as the square root of the variance, so the variance is the same as the squared standard deviation.
What does standard deviation show us about a set of scores?
Standard Deviation tells you how spread out the set of scores are with respects to the mean. It measures the variability of the data. A small standard deviation implies that the data is close to the mean/average (+ or - a small range); the larger the standard deviation the more dispersed the data is from the mean.
z scores?
If a random variable X has a normal distribution with mean m and standard error s, then the z-score corresponding to the value X = x is (x - m)/s.
