Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

problem 1)a) What do you know about frequency distribution and its significance. How do we construct it? 

b) For the purpose of performance evaluation and quota adjustment, Mr. Hanif monitored auto sales of his 40 salespeople. Over a 1-month period, he sold the following number of cars:

7       8     5   10    9    10     5    13    8    6
10    11    6    5    10    11    10   5     9    13
8      12    8    8    10    15    7    6     8     8
5       6     9    7    14    8      7    5     5    14

(i) Based on frequency, what would be the desired class marks (midpoints of the intervals)?

(ii) Create a frequency and relative frequency distribution having as many of these marks as possible. Make your intervals evenly spaced and at least two cars wide.

(iii) If sales fewer than seven cars a month are considered unacceptable performance, which of the two answers, (a) or (b), helps you more in identifying unsatisfactory group of salespeople?

problem 2)a) What do you mean by frequency Polygon and Ogives. How do we draw these?

b) For the following frequency distribution, find out:   

i) The median class.

ii) The width of the equal steps in median class.

iii) The estimated value of the median for these data.

Class              Frequency        Class           Frequency

100 – 149.5       12             300 – 349.5         72
150 – 199.5       14             350 – 399.5         63
200 – 249.5       27             400 – 449.5         36
250 – 299.5       58             450 – 499.5         18

problem 3)a)    State life Insurance provides information to its subscribers to allow them to evaluate performance of mutual funds they are considering as potential investment vehicles. A recent survey of funds whose stated investment goal was growth and income produced the following data on total annual rate of return over the past five years:

Annual return (%)    11.0 – 11.9    12.0 – 12.9    13.0 – 13.9    14.0 – 14.9    15.0 – 15.9    16.0 – 16.9    17.0 – 17.9    18.0 – 18.9
Frequency                       2                  2                    8                 10                  11                  8                  3                   1

i) Compute the mean, variance, and standard deviation of annual rate of return for this sample of 45 funds.

ii) According to Chebyshev’s theorem, between what values must at least 75 percent of the sample observations fall? What percentage of observations actually does fall in that interval?

iii) As the distribution is roughly bell-shaped, between what values would you expect to find 68 percent of observations? What percentage of observations actually does fall in that interval?

b) Students’ ages in regular daytime M.B.A. program and evening program of AIOU are described by these two samples:

Regular M.B.A    23    29    27    22    24    21    25    26    27    24
Evening M.B.A    27    34    30    29    28    30    34    35    28    29

If homogeneity of class is a positive factor in learning, use measure of relative variability to suggest which of the two groups will be easier to teach.

problem 4)a)    The engineer tested nine samples of each of three designs of a certain bearing for a new electrical winch. The following data are the number of hours it took for each bearing to fail when the winch motor was run continuously at maximum output, with a load on the winch equivalent to 1.9 times the intended capacity.

       Design

A       B    C
16    18    31
16    27    16
53    23    42
15    21    20
31    22    18
17    26    17
14    39    16
30    17    15
20    28    19

i) Compute the mean and median for each group.

ii) Based on your answer, which design is best and why?

b) Irfan Ahmad does statistical analyses for automobile racing team. Here are the fuel consumption figures in miles per gallon for the team’s cars in recent races:

4.77    6.11    6.11    5.05    5.99    4.91    527    6.01
5.75    4.89    6.05    5.22    6.02    5.23    6.11    5.02

i) Compute the mean and median fuel consumption.

ii) Group the data into five equally sized classes. What is the fuel consumption value of the modal class?

iii) Which of the three measures of central tendency is best for Irfan to use when he orders fuel? Describe.

problem 5)a)    How would you reply to following statement: “Variability is not important factor as even though the outcome is more uncertain, you still have equal chance of falling either above or below the median. Thus, on average, the outcome will be the same.”   

b) Sarsabz Seed Company sells three grades of Early White Sugar corn seed, distinguished according to the consistency of germination of the seeds. The state seed testing laboratory has a sample of each grade of seed and its test results on the number of seeds that germinated out packages of 100 are as follows.

Grade I (Regular)    88    91    92    89    79
Grade II (Extra)      87    92    88    90    92
Grade III (Super)    90    89    79    93    88

Does Company’s grading of its seed make sense?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M96080
  • Price:- $60

Guranteed 36 Hours Delivery, In Price:- $60

Have any Question? 


Related Questions in Statistics and Probability

The 1930s and the great depression with the complete

The 1930s and the Great Depression: With the complete collapse of the American economy, the people of the United States explored many possible solutions and then settled on one. What are all of the options that were in p ...

Suppose that the matching problem is to match nm men to nw

Suppose that the matching problem is to match nm men to nw women, where nw (a) Describe in detail the generalization of the Gale-Shapley algorithm for this case. Prove that the algorithm terminates with a stable matching ...

Another simple question can you give me 3 points regarding

Another simple question, can you give me 3 points regarding to origins of the Cold War.

For each experiment described below identify any confounds

For each experiment described below, identify any confounds that may be present. (Be careful not to identify things as confounds that are not.) Then, redesign each study to eliminate any confounds that you find. Write a ...

Two population meansa tomato farmer with a very large farm

Two Population Means A tomato farmer with a very large farm of approximately 2200 acres had heard about a new type of rather expensive fertilizer which would supposedly significantly increase his production. The frugal f ...

The mean monthly car payment for 123 residents of the local

The mean monthly car payment for 123 residents of the local apartment complex is $624. What is the best point estimate for the mean monthly car payment for all residents of the local apartment complex?

Please provide answer the question to the fourth decimal

Please provide answer the question to the fourth decimal place.  I am just checking my answer...  I completed the answers for A and B below, which you need to solve C. Do social shoppers differ from other online consumer ...

Carter motor company claims that its new sedan the libra

Carter Motor Company claims that its new sedan, the Libra, will average better than 24 miles per gallon in the city. Use μ, the true average mileage of the Libra. Express the null hypothesis and the alternative hypothesi ...

1 why can it be argued that the formula for calculating r

1. Why can it be argued that the formula for calculating r should be named the Edgeworth, rather than the Pearson, correlation coefficient? 2. Why may we not interpret or discuss a correlation coefficient that is not sta ...

What have you learned about the city-states in greece that

What have you learned about the city-states in Greece that you can apply to creating contact between your band of survivors and other survivor groups? Does a city-state work for your group or do you want to form another ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro