Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

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 what is the difference between a stratum and a cluster2

1. What is the difference between a stratum and a cluster? 2. What is the drawback of obtaining random samples by telephone? 3. In what way would the use of sampling improve the accuracy of the United States census?

The mean number of medicine taken by a random sample of 26

The mean number of medicine taken by a random sample of 26 patients has a standard deviation of 3.1 medications. Assume the population is normally distributed Construct a 99% confidence interval for the population standa ...

Construct an aumann model of incomplete information for

Construct an Aumann model of incomplete information for each of the following situations, and specify a state of the world in that model which corresponds to the situation (there are several possible ways of including hi ...

What was the highest point of the popes power and what was

What was the highest point of the pope's power and what was the lowest point?

Consider the following gameyou pay 100 and a fair 6-sided

Consider the following game. You pay $1.00 and a fair 6-sided die is rolled. If the roll is 1 or 3, then you get your dollar back and the game ends. If the roll is 5, you get $2.00 back (your dollar plus an additional do ...

A business student is interested in estimating the 99

A business student is interested in estimating the 99% confidence interval for the proportion of students who bring laptops to campus. He wishes a precise estimate and is willing to draw a large sample that will keep the ...

Assume the sweatshirt test scores are normally distributed

Assume the sweatshirt test scores are normally distributed with a mean of 500 and a standard deviation of 100. (a) Consider all random samples of 100 test scores. What is the standard deviation of the sample means? (b) W ...

A reasearcher studying correctional treatment on 192 sex

A reasearcher studying correctional treatment on 192 sex offenders composed of 10 females and 182 males finds that 11 males along with 1 female had reoffended. He then calculated the percentages and find that 10% of fema ...

According to a study conducted by dell computers 65 of men

According to a study conducted by Dell Computers, 65% of men and 70% of women say that weight is a very important factor in purchasing a laptop computer. Suppose this survey was conducted using 374 men and 481 women. Do ...

Suppose a firm that produces light bulbs wants to know

Suppose a firm that produces light bulbs wants to know whether it can say that its light bulbs typically last more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample of n = 25 ligh ...

  • 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

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

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen