Ask Question, Ask an Expert


Ask Statistics and Probability Expert

problem 1) Mine superintendent of ABC Coal Co has recorded the amount of time per work shift that Section Crew A shuts down its machinery for the adjustments, repairs and moving. The records for the crews last 35 shifts are given below;

60     72    126   110    91    115    112
80     66    101    75     93    129    105
113  121    93     87    119    111    97
102  116   114   107    113    119    100
110   99    139   108    128    84      99

(a) Arrange the data in array from highest to lowest.

(b) It is believed that typical amount of downtime per shift is 108 minutes. How many of crew A last 35 shifts exceeded this limit? How many were under the limit?

(c) Construct a relative frequency distribution with 10-minute intervals.

problem 2) John, owner of a Bakery found that average weekly production level of his company was 11,398 loaves, and the variance was 49,729. If date used to find out the results were collected for 32 weeks. During how many weeks was the production level below 11,175? Above 11,844?

problem 3)(a) Two events, A and B are statistically dependent. If

P(A)=0.39, P(B)=0.21, and P(A or B)=0.47

Determine the probability that:

i) Neither A nor B will occur

ii) Both A and B will occur

iii) B will occur, given that A has occurred

iv) A will occur, given that B has occurred.

(b) Given that

P(A)=3/14,    P(B)=1/6, P(C)=1/3,    P(AC)=1/7, and P(B/C)=5/21

Determine the following probabilities: P(A/C), P(C/A), P(BC) and P(C/B)

problem 4) The pressroom supervisor for daily newspaper is being pressured to find ways to print paper closer to distribution time, thus giving the editorial staff more margin for last-minutes changes. She has the option of running the presses at normal speed or at 110 percent of normal “Fast” speed. She estimates that they will run at the higher speed 60 percent of the time. The roll of paper (the newsprint “web”) is twice as likely to tear at the higher speed, which would mean temporarily stopping the presses.

(a) If the web on a randomly selected printing run has a probability of 0.112 of tearing, find the probability that the web will not tear at normal speed?

(b) If the probability of tearing on fast speed is 0.20, find the probability that a randomly selected torn web occurred on normal speed?

problem 5) A company is considering upgrading its computer system, and a main portion of the upgrade is a new operating system. The company has asked the engineer for an evaluation of the operating system. Assume the probability of a favorable evaluation is 0.65. If the probability the company will upgrade its system given a favourable evaluation is 0.85. Find the probability that the company will upgrade and receive favourable evaluation?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M95891

Have any Question? 

Related Questions in Statistics and Probability

1 how does the sample size influence the extent to which

1. How does the sample size influence the extent to which the sample data can be used to accurately estimate population parameters? 2. What statistics are used to indicate how accurately the sample data can predict popul ...

Business quantative analysis and statistics 1project

BUSINESS QUANTATIVE ANALYSIS AND STATISTICS 1 Project Management Scenario: You are a consultant with expertise in project management strategies. Select a possible project management situation from your current or future ...

The average prime member spends 5010 a year on the website

The average prime member spends $5,010 a year on the website shopping a wide assortment of goods. In order to increase sales, Amazon starts offering Two Hour Prime Delivery (you can order stuff on and it gets ...

Experiments on learning in animals sometimes measure how

Experiments on learning in animals sometimes measure how long it takes a mouse to find its way through a maze. Long experience indicates that the mean time is 20 seconds for one particular maze. A researcher thinks that ...

Two pollsters are conducting surveys to estimate the

Two pollsters are conducting surveys to estimate the proportion of Clarkston, Michigan citizens who support a bond issue to build a sports stadium. Both pollsters use the same methods; however, their sample sizes differ. ...

Islam and the other monotheistic religions write an essay

Islam and the other monotheistic religions: Write an essay discussing the relationship between Islam, Judaism and Christianity. What does the Qur'an say about the "Peoples of the Book," and how they are to be treated? Wh ...

1 what is the difference between descriptive and

1. What is the difference between descriptive and inferential statistics? 2. Describe the most common descriptive statistics. 3. What are standard scores, and how are they calculated? 4. What is meant by an unbiased esti ...

The mathematics faculty at a college consists of 6

The mathematics faculty at a college consists of 6 professors, 9 associate professors, 7 assistant professors, and 12 instructors. If one faculty member is randomly selected, find the probability of choosing a professor ...

1 true or false justify for

1. True or False. Justify for fullcredit. (a) A is an event, and Ac is the complement of A, then P(A AND Ac ) =0. (b) If the variance of a data set is 0, then all the observations in this data set must bezero. (c) If a 9 ...

Be sure to read each question carefully and answer all

Be sure to read each question carefully and answer all parts. For all Stata questions, be sure to provide the log output (which should be edited and commented so that it is easier to grade).  Q1. Find an article THAT YOU ...

  • 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