68 %
It is 68.3%
0.13
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.
3
99.7% of scores fall within -3 and plus 3 standard deviations around the mean in a normal distribution.
A Z score of 300 is an extremely large number as the z scores very rarely fall above 4 or below -4. About 0 percent of the scores fall above a z score of 300.
It is 68.3%
0.13
2
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.
3
Normal IQ scores for children typically fall between 90 and 110. Scores above 130 are considered superior, while scores below 70 are indicative of intellectual disability. It's important to consider other factors when interpreting IQ scores, such as a child's age and individual strengths and weaknesses.
99.7% of scores fall within -3 and plus 3 standard deviations around the mean in a normal distribution.
The answer is about 16% Using the z-score formula(z = (x-u)/sd) the z score is 1. This means that we want the percentage above 1 standard deviation. We know from the 68-95-99.7 rule that 68 percent of all the data fall between -1 and 1 standard deviation so there must be about 16% that falls above 1 standard deviation.
Yes! Congratulations. (Most folks' scores fall within between the low 500's to the high 700's. You've broken through.)
that you have quite superior mental abilities heres a range guide ( note that in most tests the average is 100 ) Over 140 - Genius or near genius 120 - 140 - Very superior intelligence 110 - 119 - Superior intelligence 90 - 109 - Normal or average intelligence 80 - 89 - Dullness 70 - 79 - Borderline deficiency Under 70 - Definite feeble-mindedness Normal Distribution & IQ Scores The properties of the normal distribution apply to IQ scores: 50% of IQ scores fall between 90 and 110 70% of IQ scores fall between 85 and 115 95% of IQ scores fall between 70 and 130 99.5% of IQ scores fall between 60 and 140 and here is a guide for above average 115-124 - Above average (e.g., university students) 125-134 - Gifted (e.g., post-graduate students) 135-144 - Highly gifted (e.g., intellectuals) 145-154 - Genius (e.g., professors) 155-164 - Genius (e.g., Nobel Prize winners) 165-179 - High genius 180-200 - Highest genius >200 - "Unmeasurable genius"
IQ stands for intelligence quotent. It is said to measure a persons intelligence. An IQ score of 150 is said to be genius level. Less than 1 percent of IQ scores fall into the 145 to 159 range.