![]() Find the 40th percentile of the height of Dinaric Alps distribution for men. The distribution of height is approximately normal with a mean height of 6 ft 1 in 73 inches and standard deviation of 3 inches. The adult men of the Dinaric Alps have the highest average height of all regions. Find the IQ score which separates the lowest 25% of all IQ scores for this age group from the highest 75%. Find the 80th percentile of the IQ scores distribution of 20 to 34 year olds. What percent of this age group have an IQ between 90 and115? 3. ![]() What percent of this age group have an IQ less than 100? 2. Scores on the Wechsler Adult Intelligence Scale, a standard IQ test, are approximately normal for the 20 to 34 age group with mu =110 and sigma =25. proportion to find the corresponding z.“Unstandardize” Then find the required area under the standard Normal to transform the solution from a z-score to a value of x curve using Table A. TeeTimes Because the sampling distribution of p is normally distributed, if we choose z/2p as the margin of error in an interval estimate of a population. Draw a picture to show the given proportion or the proportion to the left of given area of interest under the standard Normal curve. Question: Name _ INTERPRETING Z-SCORES Worksheet #2 Normal Distributions FINDING A PERCENT/PROPORTION given an x value FINDING AN X VALUE given a percentage/proportion Standardize x to restate the problem in terms of a Look in the body of Table A for the entry closest to the standard Normal variable z. What percentage of men have a height greater than 74 inches? What percentage of data are below this datum 5. ![]() The distribution of height is approximately normal with a mean height of 6 ft 1 in 73 inches and standard deviation of 3 inches. A datum is one standard deviation above the mean in a normal distribution. ![]() What percent of this age group have an IQ between 90 and115? 3. Quiz & Worksheet - Normal Distribution Quiz Course Try it risk-free for 30 days Instructions. proportion to find the corresponding z.“Unstandardize” Then find the required area under the standard Normal to transform the solution from a z-score to a value of x curve using Table A. Name _ INTERPRETING Z-SCORES Worksheet #2 Normal Distributions FINDING A PERCENT/PROPORTION given an x value FINDING AN X VALUE given a percentage/proportion Standardize x to restate the problem in terms of a Look in the body of Table A for the entry closest to the standard Normal variable z. ![]()
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