Chi-Square Test11. A skilled typist on routine work, kept a record of mistakes per day during 300working days. The data are given below :Mistakes per day13456TotalNumber of days1439042129300 observedFrequencies underPoisson Distribution12311049141300 expectedDoes the Poisson Distribution give a good fit ?

Answered: Image /qna-images/answer/3152f58a-9363-4088-999b-cc3173cb078f.jpg

Answered: 11. A skilled typist on routine work,…

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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The number of hours worked (per week) by 400 statistics students are shown below in Table 1. Number of Hours Frequency 0 - 9 20 10 - 19 80 20 - 29 200 30 - 39 100 Refer to Table 1. ' 1. The class width for this distribution Group of answer choices is 39, which is: the largest value minus the smallest value or 39 - 0 = 39. is 10. is 9. varies from class to class. 2.The number of students working 19 hours or less Group of answer choices is 180. is 300. is 100. is 80. 3.The relative frequency of students working 9 hours or less Group of answer choices is 0.95. is 100. is 20. is 0.05.
b) Rachel received the following scores on the midterm and final examinations in his introductory psychology course. The mean and the standard deviation for each test are given below. Assume that the normal distribution provides a good model for the frequency distribution. Section 8. 40 90 |Midterm 50 Final 100 12 i. What percentage of students scored better than Rachel on the midterm? The department has decided that all marks from introductory psychology courses should be reported based on a standardized distribution with a mean of 100 and standard deviation of 15. What would be Rachel's final examination scores based on ii. this new distribution?
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their responses are shown on the right. 13 30 4 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median. Which measure of central tendency better describes hours worked? 13 6. 17 19 23 18 18 21 27 24 9 25 ..... Choose the correct frequency histogram below. OA. O B. C. Hours Worked Hours Worked Hours Worked per Week per Week per Week 10 20 30 10 20 30 10 20 30 hours hours hours Is the histogram for the data set skewed right, skewed left, or symmetric? skewed right skewed left O symmetric The mean number of hours worked by college students outside the home is approximately hours. (Type an integer or decimal rounded to three decimal places as needed.) The median number of hours worked by college students outside the home is hours. Which measure of central tendency better describes hours worked? median mode…
1. Give an examle of a paired date set 2. Why is the chi-square distribution always positive?
12. Suppose a math class had a set of marks with a mean of 67% and a standard deviation of 10%. The teacher "bell-curved" the results and added 8% to each students mark. Describe the effect (if any) of this bell-curve on each of the following: a) mean b) the graph of the box-and whisker plot c) standard deviation
The mean # of hours worked
A random sample of five observations from three normally distributed populations produced the following data: (You may find it useful to reference the F table.) (table is the screenshot picture) a. Calculate the grand mean. (Round intermediate calculations to at least 4 decimal places and final answer to 4 decimal places.) b. Calculate SSTR and MSTR. (Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.) c. Calculate SSE and MSE. (Round intermediate calculations to at least 4 decimal places and final answers to 4 decimal places.) d. Specify the competing hypotheses in order to determine whether some differences exist between the population means. _H0: μA = μB = μC; HA: Not all population means are equal. _H0: μA ≤ μB ≤ μC; HA: Not all population means are equal. _H0: μA ≥ μB ≥ μC; HA: Not all population means are equal. e-1. Calculate the value of the F(df1, df2) test statistic. (Round intermediate calculations to at least 4 decimal…
Solve the following by concept of normal distribution and graph clearly. Show your complete solution and write clearly and readable. Thank you. In a job fair, 3000 applicants applied for a job. Their mean age was found to be 28 with a standard deviation of 4 years. A.) draw a normal curve distribution showing the z scores and raw scores. B.) Find the age such that 75% are below it. (Normal curve in letter A is the normal curve for letter B).
Task 2 a) For the 25 participants, use the Frequencies option to produce output detailing the following measures: Minimum,age. Maximum age. Mean age. Standard deviation in the ages. Range of ages. Skewness in the ages. I Frequencies Statistics Age (years) of patient N Valid 25 Missing Mean 41.24 Std. Deviation 20.102 Skewness 186 Std. Error of Skewness 464 Range 78 Minimum 4 Maximum 82 Figure 2. Table showing measures of central tendencies and measures of dispersion of participants ages b) Briefly describe the distribution of the ages of the participants as suggested by these summative measures.

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