Ex 1: A production facility employs 20 workers on the day shift, 15 workers on the swing shift,and 10 workers on the graveyard shift. A quality control consultant is to select 6 of these workers forin-depth interviews. Suppose the selection is made in such a way that any particular group of 6 workershas the same chance of being selected as does any other group (drawing 6 slips without replacementfrom among 45).a) How many selections result in all 6 workers coming from the day shift?b) What is the probability that all 6 selected workers will be from the day shift?c) What is the probability that all 6 selected workers will be from the same shift?

Given Information: Number of workers on the day shift is 20 Number of workers on the swing shift is…

Answered: Ex 1: A production facility employs 20…

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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Assume that a tennis coach from Texas wants to develop a rally test that can classify players’ performance level accurately. The coach randomly selected 20 tennis players, 10 players are Super Champs (high level), another 10 are Challengers (low level). The coach feeds 10 balls to each of players and sets up the cutoff score of 8. Namely, if a player who can return 8 out of 10 balls to a specific area, is considered a high level. Otherwise, they are considered as low level performance. The table below showed the numbers that players can return balls to the specific area. What is the contingence coefficient? SuperChamps Challegers 10 8 10 8 10 7 9 7 9 6 8 5 8 6 8 3 7 4 7 5 a. .70 b. .75 c. .80 d. .85
A bag contains three different balls, one red (r), one blue(b), one white(w). TWO balls are drawn from the bag without replacement one after the other (at random without looking) and the colors recorded. This means once the first color is drawn, the first ball is kept out of the bag and only 2 colors remain when the second ball is drawn. List the sample space. [Use lower case letters for the colors, preserve the given order, commas separating pairs, no spaces.]
It is desired to estimate the proportion of motor vehicles registered in a province whose chassis number is incorrectly entered in the traffic document. For this purpose, 135 of the vehicles coming to the inspection station are selected randomly and it is seen that the chassis numbers of 41 of these vehicles are wrongly written on the traffic document. Which of the following is the point estimate of the proportion of motor vehicles in this province whose chassis numbers are wrongly written in the traffic document
An advertising agency wants to know whether the no of column inches of classified ad carried by 2 competing newspapers is equal. The no of column inches appearing in both newspapers, respectively, on 20 randomly selected days follows: 663 & 725, 713 & 806, 626 & 620, 682 & 626, 639 & 595, 651 & 614, 769 & 744, 701 & 719, 723 & 680, 670 & 639, 665 & 602, 639 & 657, 694 & 624, 614 & 614, 651 & 583, 632 & 682, 739 & 657, 657 & 639 & 775 & 745. Use signed-rank test at 0.01 level of sig to test to test whether or not newspaper 1 & 2 carry equal amount of classified ad. What is the z value and decision?
A new batch of processors are to be tested for effciency. The same specific set of tasks are run by each of a set of randomly selected 10 processors, and the recorded execution times for each are as follows (rounded, in seconds): 7,11,9,7,13,10,8,9,11,10,8,12,8,9,10 Answer the following questions. The answers will be numbers or letters (not case senisitive): (a) Write the five point summary of this data set: ( (b) The interquartile range of this data set is (c) Are there any outliers? Aswer Y for yes and N for no. (d) Is this data set left skewed (L), right skewed (R) or symmetric? Answer L, R or S: (e) The mean of this data set is and the sample standard deviation is Give your answers with EXACT two decimals. DO NOT ROUND. (f) Based on this data and using sample standard deviation as an estimator, a 90% confidence interval for the mean execution time is: (
c) A simple random sample of 200 names from a list of 3042 names and addresses wereinvestigated and the record shows that 38 had wrong addresses. i. Estimate the total number of addresses that needs correction Compute the standard error of your estimate in (i) above .
The assets (in billions of dollars) of the four wealthiest people in a particular country are 46, 33, 21, 12. Assume that samples of size n = 2 are randomly selected with replacement from this population of four values. a. After identifying the 16 different possible samples and finding the mean of each sample, construct a table representing the sampling distributi- of the sample mean. In the table, values of the sample mean that are the same have been combined. Probability Probability x 46 39.5 33.5 33 29 (Type integers or fractions.) CITR X 27 22.5 21 16.5 12
Asurvey of 160 families showed that 59 had a dog, 46 had a cat, 19had a dog and a cat,
To get a sample of 50 students for a student services survey, an assistant principal uses the calculator command "randInt(1,72,5)" to pick five numbers between 1 and 72. He goes to those five pages in the 72-page directory and chooses the ten students pictured on each of those five pages. Will this sampling strategy result in a random sample from the population under consideration?
5. Suppose a strata (stratified random sampling ) represents 10 companies from a population of 100 companies , how many companies this strata should be represented in a sample of 60 companies? *
The geographical distribution of the hometown of 80 students of PUP is given as: 50 from Luzon, 10 from Visayas, and 20 from Mindanao. (1) How many ways can three students be selected at random such that NO student comes from Luzon and Mindanao.(2) How many ways can three students be selected at random such that all of them come from any of the three places.

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