Еxample 22A survey was conducted in respect of marital status and success inexaminations. Out of 2000 persons who appeared for an examination, 80%of them were boys, and the rest were girls. Among 300 married boys, 140were successful, 1,100 boys were successful among unmarried boys. Inrespect of 100 married girls 40 were successful.200 unmarried girle were

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Answered: A survey was conducted in respect of…

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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a) What proportion of 20% of defective items should a supervisor in the quality system of a plastic products company accept when they ask him to evaluate a routine inspection procedure for orders of 100 identical articles, knowing that the procedure consists of taking a sample of 10 items and the one to accept the order if no more than 2 defective items are found? b) How many defective items are expected to appear in the sample?
A set of 12 scores has a mean of 42. Two new scores are added to the set. i) If one of the new scores is 20 and the mean is unchanged, what is the other new score? ii) If one of the new scores is 20 and the new mean is 40, what is the other new score?
A sample of 300 items was selected. compute the p-value
Suppose an instructor wants to know the average height, gender distribution, academic performance (bad, good, very good, excellent), and year of admission of the students of the college of the science of SQU. He divided the students into male and female and took a random sample of 30 male and 30 female students. a) What is the implied population in this study? b) Identify the variables of the study c) Classify the identified variables according to qualitative and quantitative. d) Identify the level of measurement of each identified variable e) Which sampling technique was used to select 60 students?
2. A researcher wants to measure the job satisfaction levels of the employees of two fast food company located in Manila. The researcher has used a questionnaire consisting of ten questions related to job satisfaction levels of the employees. The researcher has used a rating scale from 1 to 4 where 1 is the lowest score and 4 is the highest score. So, a maximum score of 40 and a minimum score of 10 can be obtained. The researcher has randomly selected 15 employees from the first company and 17 employees from the second company. The scores obtained from these employees are given below: First Company: 32 40 31 33 32 30 30 32 31 32 34 32 38 32 28 Second Company: 25 28 23 27 24 26 27 22 25 26 34 25 23 22 29 27 24 Taking 5% as the alpha level, examine the significant difference in terms of job satisfaction level between the employees of the two companies.
6) As part of a project, you and a group poll 400 students about lunches. 54% of the respondents replied that they preferred pizza. What is the likely interval of students at Hillgrove who prefer pizza?
A small company is interested in determining how many of its employees are still paying off student loans. However, the company doesn't want to allocate the resources required to survey every single employee. So they decide to randomly sample 2 individuals from each department using a simple random sample approach. There are a total of 6 individuals that work in the human resources department. How many possible distinct combinations of 2 individuals could be selected from the human resources department?
A reporter writing for a national newspaper claimed that representatives of school districts were falsely reporting their students’ performance on standardized tests. Over 90% of the nation’s school districts report that their students are performing above the national average, and the reporter claimed that isn’t possible. It is possible. a) Provide a list of 10 numbers for which 90% are above the mean. b) What can you infer about the nation’s school districts if 90% of them really are performing above the national average?
suppose you select a simple random sample of 75 douglas college student and you find that 8 are left handed what is the best point of estimate of p, the proportion of all douglas college students who are left handed
In a college there are 2000 students, we draw a simple random sample without replacement of 500 students from the 2000 students. We ask each student in the sample "Do you use laptop? Yes or No", 230 students answer Yes and 270 students answer No. Estimate the number of student in the college who use laptops.
4.You wish to gather data from a simple random sample of 15 households in a city that has 180 blocks. How many different samples are possible if each house surveyed is from a different block? Please answer with details on how to do it. Thank you.
As part of the marketing group at a film studio, you are asked to find out the age distribution of the audience of the studio's latest family friendly film. With the help of 10 of your colleagues, you conduct exit interviews by randomly selecting people to question at 20 different movie theatres. From 468 responses, you find out that 42 are younger than 6, 84 are 6 to 9 years old, 158 are 10 to 14, 22 are 15 to 21, and 162 are older than 21. Complete parts a and b below. a) Make a frequency table for the age distribution of the audience. Age Range Frequency Under 6 6 to 9 10 to 14 15 to 21 Over 21

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