9. You are conducting an experiment on the effectiveness of a readingintervention with young children and want to report the descriptiveresults to your colleagues. Some of the children received the inter-vention, and some did not. What do the averages and standarddeviations tell you about the results? For this exercise, use the datain Chapter 3 Data Set 2.No Intervention18161715161422217242319122023Intervention1715212412161425192421259913

No intervention : N = 15{ 18,16,17,15,16,14,22,21,7,24,23,19,12,20,23 } Intervention : N=15{…

Answered: 9. You are conducting an experiment on…

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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Please answer the last two parts of the question (b,c)
Consider the following sample data. Sample A: 13, 23, 33 Sample B: 71, 81, 91 Sample C: 1,050; 1,060; 1,070 (a) Find the mean and standard deviation for each sample. (b) What does this exercise show about the standard deviation? multiple choice The idea is to illustrate that the standard deviation is not a function of the value of the mean. The idea is to illustrate that the standard deviation is a function of the value of the mean.
An IQ test is an assessment that measures a range of cognitive abilities and provides a score that is intended to serve as a measure of an individual's intellectual poten- tial and ability. The following data set gives a score of IQ test for 40 employees in Company SM. Given the mean of this sample is 63.5 and the standard deviation is 12.33. (a) (b) (c) (d) 88.9 k 77.0 76.5 75.9 75.4 75.3 74.2 73.5 72.9 72.4 72.1 70.3 70.1 67.9 67.0 66.6 66.3 65.6 64.3 63.0 61.1 61.0 60.9 60.8 58.9 58.7 58.3 58.2 57.6 55.4 54.8 54.7 54.7 54.7 54.2 53.0 49.3 46.0 14.1 Determine the value of k. Select a suitable graphing approach for this data and plot the data. Indicate the distribution of the data. Determine the median and mode. By removing the smallest value (outlier), calculate the mean, median and mode. Compare these measures with the previous values before removing the outlier. Comment on these three measures in the presence of outlier.
Please help me with the following question.
You are deciding whether or to take Professor Smith or Professor Jones' advanced statistics class next semester. You know their grading range is the same 100 90 A, 89 80 B, 79 70 C, 69-60 D and failing is below 60. Both Professor's grades are distributed normally with Professor Smith's mean is 74 and standard deviation is 8.1 while Professor Jones' mean is 80 and standard deviation is 16.9. a.) which professor gives a higher proportion of A's? (i.e., you should take this professor's class) b.) which professor gives a higher proportion of F's? (i.e. you should avoid this professor's class) How would I figure this problem out?
Can you find me an example of a grouped histogram on the internet, where the independent variable is related to some psychological topic. Please copy and paste an image of the histogram and describe it. Focus on the following: 1. what are the x-axis values (i.e. what variable is measured and what are the units)?2. what shape does the distribution have if any?3. what is the most frequent observation (can be more than one)4. What is the range (expressed as a single number)?5. what is the interval size?6. How many intervals are there?
Part B please, my answer is wrong!
You hypothesize that people in stats classes are happier than people in all other classes. You compare happiness scores in three of your classes: Statistics, Developmental Psychology, and Social Psychology. In Statistics there are 15 students and the mean happiness rating is 23.1 with a standard deviation of 9.78. In Developmental Psychology there are 15 students and the mean happiness rating is 24.4 with a standard deviation of 2.92. In Social Psychology there are 15 students with a mean rating of 17.7 and standard deviation of 8.46. The sum of squares between groups is equal to 384. The sum of squares within groups is equal to 2461. Use the One-Way ANOVA calculation table to help calculate. What is the degrees of freedom within samples?
For each case below, state what type of statistical test you would use to analyze each dataset. Explain your answer! Hemoglobin is a protein responsible for carrying oxygen throughout your blood stream. Blood hemoglobin levels in humans average at about 14.5g/dL. We are interested in whether a sample of 20 iron deficient individuals have lower blood hemoglobin levels compared to the general population. The average hemoglobin level for our sample is 10.9g/dL, with an estimated population standard deviation of 1.92g/dL. A researcher is looking at whether the time it takes for rats to relearn how to run a maze decreases after they’ve been exposed to the maze more than once. Using 15 rats, he measures how quickly they are able to successfully run a maze at two different times points: once when they are first exposed to the maze, and again after they’ve run the maze three times. A social psychologist is curious about whether social rejection increases aggression in narcissists. He…
In this exercise, you will compare Chebyshev’s rule and the empirical rule. a. Compare the estimates given by the two rules for the percentage of observations that lie within two standard deviations to either side of the mean. Comment on the differences.b. Compare the estimates given by the two rules for the percentage of observations that lie within three standard deviations to either side of the mean. Comment on the differences.
You are comparing data from two similar experiments that have a mean of 53. Experiment A has a standard deviation of 3.4 and experiment B has a standard deviation of 1.5. What does this tell you about the data in the experiments?
Tips given to taxi drivers form a substantial part of their income. They also serve as a loose metric of service quality that can be useful for taxi companies. An analysis of a large dataset shows that the tips given (as a percentage of taxi fares) are normally distributed with mean 21.3% and standard deviation 7.5%. Furthermore, tips received for different trips are independent from each other. taxi driver expects to do 2000 trips next year. For approximately how many of these trips will he receive a tip over 25%?

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