EXAMPLE 20. In the case of two Firms A and B the following information is given : Firm No. of Workers Average Wage Standard Deviation A 20 80 5.8 B 30 30 6.3 Calculate the average wage and standard deviation of both firms.

Q: 1. The following are the ages of the first 10 female visitors at Kath's birthday 8 19 43 25 6 15 22…

A:

Q: (Chapter 4.3) Suppose the lengths of plastic rods produced by a machine are normally distributed and…

A: Solution: Given : The length of plastic produced are normally distributed and independent with mean…

Q: If the correlation coefficient between variables is .60, how much of the variance is unexplained by…

A:

Q: The file contains the amount that a sample of nine customers spent for lunch ($) at a fast-food…

A: According our policy we can answer only first three subpart for remaining please repost the…

Q: The following are some of the particulars of the distribution of weight of boys and girls in a class…

A:

Q: -32. Calculate Coefficient of Concurrent Deviations from the data given below : No. of Workers: 300…

A:

Q: (1) The standard deviation of the following data is 20.52. weight (kg) 10-14 15-19 20-24 25-29 30-34…

A: Given data, Weight Number of students 10-14 5 15-19 4 20-24 6 25-29 7 30-34 2 Total…

Q: The weights of corn grew on a separate farm that was close to farm from question 2. The weights of…

A: Given that the mean= 23 and standard deviation=2 So, 1.5 standard deviations less than the mean is=…

Q: Example 13. Calculate the mean deviation from the mean for the following data: Class Interval: 0 - 4…

A: Class Frequency 0 - 4 4 4 - 8 6 8 - 12 8 12 - 16 5 16 - 20 2

Q: Section: B Q # 2. Find Quartile deviation, Mean deviation and Coefficient of Quartile deviation from…

A: Given, Class boundaries (Marks) No. of students 19.5-29.5 8 29.5-39.5 87 39.5-49.5 190…

Q: Question 1 A nutritionist conducted a survey to study the blood pressure(mmHg) of 8 randomly…

A: For a set of n observations, x1, x2, ... , xn mean is given by, And the variance is given by, The…

Q: 8th-ed Chapter 09, Supplementary Exercises, Problem 110

A:

Q: Example 4. Calculate the quartile deviation and coefficient of quartile deviation and the ceficient…

A:

Q: Without the degrees of freedom, the standard deviation of population will be estimated:   Question…

A: We want to know Without degrees of freedom standard deviation of population is.

Q: The following data set belongs to a population: 5 -7 2 0 -9 16 10 7 Calculate the range, variance,…

A: Data  5,-7, 2,0,-9,16,10,7 Range=max-min

Q: A nutritionist gets the amounts of sugar (grams) from 10 different cereals, including Cheerios, Corn…

A:

Q: Question 1 (15 points) 1. A study compares the statistics anxiety between male and female students.…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Example 12.11 Two salesmen, A and B, are employed by a company. Recently, it conducted a sample…

A:

Q: 5 Forty concrete cubes were subjected to failure tests in a crushing machine. Failure loads were as…

A: Note : We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: A gambling casino records and plots the mean daily gain or loss from 5 blackjack tables.  The…

A: Given:             n=5           E(Xbar) =$10825           S. D(X) =$1610

Q: Example 2. The first of the two samples has 100 items with mean 15 and standard deviation 3. If the…

A:

Q: Question 2 One give you the distribution of all the shop turnovers of a large company in k€…

A: Formula Used: Mean = ∑FX∑F Wwhere F is the frequency and X is the mid-value Sample standard…

Q: QUESTION 1 Find  the standard deviation of the following data items:   22, 27, 27, 35

A:

Q: QUESTION ONE A. Consider the following sample with 20 observations: 1 1 5 7 9 11 20 21 23 28 28 31…

A: Data given 1,1,5,7,9,11,11,14,14,19,20,21,23,28,28,31,39,41,43,47 Note: According to Bartleby…

Q: 3. The following is a set of data collected from a sample population. 43 46 47 50 45 | 46 43 48 Use…

A: Introduction: Suppose x1, x2, …, xn is a sample of size n taken from a population of interest. The…

Q: Example 2. Calculate the quartile deviation and co-efficient of quartile deviation from the…

A:

Q: 2. The average number of customers that visited a particular store during the past year is 160 per…

A:

Q: 1. The following are the ages of the first 10 female visitors at Kath's birthday 8 19 43 25 6 15 22…

A: For the given data Find Range =? Quartile deviation =? Standard deviation = ? Variance =?

Q: their "Go Business" project are normally distributed with a mean of P4,250 and a standard deviation…

A: Given : The weekly sales of ABM students on their "Go Business" project are normally distributed…

Q: QUESTION 3 The following table contains the return on equity (ROE) and share price of ABC…

A: According to the Bartleby rule solved three subparts only.

Q: Example 9.23 If X is the mean and s is the standard deviation of a set of measurements which are…

A:

Q: This question refer to the following data: Sentence Year. 13 10 8 6 4 7 14 7 What is the standard…

A: Given data, 13,10,8,6,4,7,14,9,7 Standard deviation=?   Mean is =∑xn=789=8.67

Q: / Example 11. Find the mean deviation from (i) mean and (ii) median for the following daia: Marks :…

A:

Q: Question Q.1 The annual incomes of fifteen families are given is Rs. as: 60, 80, 90, 96, 120, 150,…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: O Question 5 The following results are for independent random samples taken from two populations…

A:

Q: 1. Solve the problem  Twenty families were interviewed, and the following numbers of dependent…

A: (a) From the data, the frequency for the number of children category 0 is 2 because 0 appear two…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Given X is normal Distributed with mean µ = 116.0 and standard deviation σ = 14.0 now will using…

Q: QUESTION 5 Courier Service Company Express-way provides service that allows someone to send parcels…

A:

Q: 3. In problem #1. What is the value of its standard deviation? a. S, = 8.38 b. s, = 8.08 C. S, =…

A:

Q: Question 2 Bridget surveyed the price of petrol at petrol stations in Cape Town and Durban. The…

A: A smaller standard deviation means more  consistency.

Q: Given the following data:     Data 1 Data 2    1    1    4    5    5    5     6    5    8    8…

A:

Q: Chapter 11 10)Are low-fat diets or low-carb diets more effective for weight loss? A sample of 76…

A: We are authorised to answer three subpart at a time, since you have not mentioned which part you…

Q: Question 3 The number of hours worked per week for a sample of ten students is shown below. Student…

A: 1. Mean: Mean is the expected value of a set of observations. In other words, mean is he average of…

Q: QUESTION ONE A. Consider the following sample with 20 observations: 1 1 5 7 9 11 20 H 23 28 28 11 39…

A:

Q: Question 3 Calculate the mean deviation from mean and its coefficients from the following data: Size…

A:

Q: Exhibit 6-4 The starting salaries of individuals with an MBA degree are normally distributed with a…

A: Let X be the starting salaries of individuals with an MBA degree X~N(μ=40000, σ=5000)

Q: One of the cars sold by Walt's car dealership is a very popular subcompact car called the Rhino. The…

A: Let X be the sale price of the car. Then, X~ N( 19600, 3602). Hence,…

Q: Question Number 05   Two salesmen A and B are working in a certain district. From a sample survey…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: The weekly rental prices of rental properties are normally distributed with a mean of $250 and a…

A: It is given that the mean is 250 and standard deviation is 50.

Q: Example 5. Calculate Quartile Deviation and its Coefficient from the following data : Weight (in…

A: We have given that,  The data set is,  Weight (x)  120 122 124 126 130 140 150 160 Students (f)…