I. Answer each of the following using the Empirical Rule forNormal DistributionsAn IQ test is normally distributed with mean 100 and standarddeviation 15. Just by knowing the mean and standard deviation,we can answer the following questions:1. Sketch a normal curve labeling the horizontal axis withappropriate values.2. Between what two values do approximately 68% of IQ scoreslie?3. Between what two values do approximately 95% of IQ scoreslie?

Answered: Image /qna-images/answer/18c50232-5b13-43eb-adfc-658173ef89e0.jpg

Answered: I. Answer each of the following using…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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As shown below are two normal curves. Let and o be the mean and the standard deviation of curve A (the more peaked curve) and Hg and og be the mean and the standard deviation of curve B (the broader curve). What do you observe about these two normal curves? P(x) 0.4 A 0.3 0.2 0.1 0.0 2 4 6 10 2 14 Select one: a. All statements are true. b. The mean of both curves is 8. Symbolically, HA = HB = 8. c. Both curves are symmetric with respect to their means. O d. Curve A has a lower standard deviation than Curve B. Symbolically, oA 8.
The regression line for a set of data will have little meaning unless: Select one: a. the correlation coefficient is significant. b. the slope of the regression line is zero. c. the standard deviation of errors is zero. d. there are at least 30 data points chosen.
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Using the Appendix Table A-1 in Statistical Psychology: The mean for quiz#1 was 1.14, the standard deviation was .30. What proportion of the class scored above a 1.14? What proportion of the class scored below a .8? What proportion of the class scored between a 1.0 and a 1.5? What quiz grades marked off where the middle 95% of the class scored?
Select all true statements below (Multiple or none can be true). With a large, representative sample, the histogram of the sample data will follow the normal curve closely. If two lists of numbers have exactly the same average of 50 and SD of 10, then the percentage of entries between 40 and 60 must be exactly the same for both lists. Half of a list of numbers is always below its average. The median and average of a list of numbers are not necessarily close together.
Which of the following statements is not true? There is only one median for each variable. One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude. Another term for the median is 50th percentile. The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.
What is the level of measurement of the variable “age”? A. IQR B. Range C. Median D. Ordinal E. Mode F. Nominal G. Mean H. Interval/Ratio I. IQV J. Standard deviation
D Question 24 The weights of cats is Normally Distributed. The mean weight is 10 lbs with a standard deviation of 0.2 lbs. Draw the normal curve and fill in the cut scores and percentages. Then answer the questions below: Based on a sample of 600 cats, how many would you expect to weigh more than 10.4 lbs? Based on a sample of 600 cats, how many would you expect to weigh at least 9.8 lbs. but not more than 10.2 lbs? Based on a sample of 600 cats, how many would you expect to weigh more than 10 lbs?
Calculate following?
The population mean mu is a measure of A. Central tendency of a sample B. Central tendency of a populationC. Dispersion of a population D. The uncertainty of a population E. None of the above
Please answer all this questions.

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