6. A researcher develops a test for identifying intellectually gifted children. It has au= 56 and o=8.d.What percentage of children are expected to score above 60?What percentage of the scores will be below 54?b.You measure 64 children and get a sample mean of 58.28? How likely is this sample toC.relate to the originally described population using a two tail analysis with a 0.05. Wouldyour conclusion change if we did a one tail analysis with a-0.01?

Area under the normal curve is the sum of all probabilities of variable X. Since probability ranges…

Answered: 6. A researcher develops a test for…

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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3. In a bar graph of qualitative data, the highest bar always corresponds to that data's А. Мean В. Median С. Мode D. Range E. Variance 4. If the data is skewed right, which of the following would you expect to be true? A. Mean > Median B. Mean < Median C. Mean = Median
3. A study in Men's Health magazine stated that 14% of men said they used exercise to reduce stress. Use a = 0.10. A random sample of 100 men was selected and 10 said they used exercise. Does the sample support the claim made by the magazine?
Following are the fuel efficiency, in miles per gallon, for a sample of convertibles. Calculate the sample variance. 25, 26 , 21 , 20O, 21 Write only a number as your answer. Round to one decimal place (for example: 8.3).
8
Suppose you are asked to toss a coin 16 times and calculate the proportion of the tosses that were heads. a. What shape would you expect this histogram to be and why? b. Where you do expect the histogram to be centered? c. How much variability would you expect among these proportions? d. Explain why a Normal model should not be used here.
Which of the following is the value of ?0.05 with a sample size of 10? a. 1.812 b. 1.900 c. 1.860 d. 1.833
a. Write a table with observations for these samples. b. Using the table, explain (calculate) where the S=1.22 comes from c. Conduct a two-tailed comparison of the two groups with a=.05. Please remember to state your hypothesis. Now look at: d. Write a table with observations for these samples. e. Using the table, explain (calculate) where the S=6.65 comes from f. Conduct a two-tailed comparison of the two groups with a=.05. g. What changed between [a-c] and [d-f]? what impact did it have?
Suppose that the time in minutes it takes a student to complete an assignment is normally distributed with a mean 50 and variance 100 then the 85th percentile of the average time it takes a random sample of 25 students to complete the assignment is closest to a 48. • b. 52 • C. 40. • d. 60. • e. 71.
4. The lowest and the highest data value of a data set are 12 and 28 respectively, then the approximate standard deviation is:
1. A researcher plans to conduct a survey among students in a public high school. If the population of thisschool is 5,000, find the sample size and the percentage from the N population. (Margin of error is 5%)A = {9,10,11,7,13}B = {10,10,10,10,10}C = {1,1,10,19,19}a. Calculate the mean of each data set.b. Calculate the standard deviation of each data set.c. Which set has the largest standard deviation?
a. Qi b. Q3 3. The revenues of the top eleven personal computer manufacturers are given (in hundred millions). 1. 27 a. Compute the first quartile. -C. M. 7 8. 9. 9. 10 b. The third quartile. c. Determine the median. d. Draw a box plot for the data. е. е. Calculate Pearson's coefficient of skewness.
Please help me with both parts a and b of this question! Thank you!

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