Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

problem 1) Following data represent the life (in months) of 20 UPS fitted to a hospital on February, 25, 2005:

85    75    66    43    40
88    80    56    56    67
89    83    65    53    75
87    83    52    44    48

a) Construct frequency distribution with classes 40–49, 50–59, etc.

b) find out the sample mean from the frequency distribution, and interpret.

c) find out the sample mean from the raw data.

d) Compare parts (b) and (c) and comment on your answer.

problem 2) Here are the high temperature (in Fahrenheit) readings:

84    86    78    69    94    95    94    98    89    87    88
89    92    99   102   94    92    96    89    88    87    88
84    82    88    94    97    99    102    105

find out and interpret the:

a) Mean and median for this data

b) Standard deviation and variance

c) Interquartile range

d) 70th percentile   

problem 3)a) Define and describe mutually exclusive, not mutually exclusive, independent and dependent events.

b) Describe with exs the terms: permutation and combination.

c) A bag contains 5 white and 7 black balls. If three balls are drawn from the bag, what is the probability that;

i) All are white

ii) Two white and one black

iii) All are of the same color    

problem 4)a) The probability that married man watches a certain television show is 0.4 and the probability that a married woman watches the show is 0.5. The probability that a man watches the show, given that his wife does, is 0.7. Determine the probability that:

i) a married couple watches the show;

ii) a wife watches show given that her husband does;

iii) at least 1 person of a married couple will watch the show.

b) A town has 2 fire engines operating independently. Probability that specific engine is available when needed is 0.96.

i) Find the probability that neither is available when needed?

ii) Find the probability that a fire engine is available when needed?   

problem 5)a) A random sample of 100 recorded deaths during the past year showed an average life span of 71.8 years. Assuming a population standard deviation of 8.9 years, does this seem to indicate that mean life span today is great than 70 years? Use 0.05 level of significance.

b) Electric firm manufactures light bulbs that have lifetime that is approximately normally distributed with means of 800 hours and standard deviation of 40 hours. Test hypothesis that µ = 800 hours against alternative µ ≠ 800 hours if random sample of 30 bulbs has the average life of 788 hours. Use a 0.10 level of significance.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M95993

Have any Question? 


Related Questions in Statistics and Probability

Consider the following belief space where the set of

Consider the following belief space, where the set of players is N = {I, II}, and the set of states of nature is S = {s 1 , s 2 }: Write out the belief hierarchies of orders 1, 2, and 3 of Player I, at each state of the ...

A random sample of the price of gasoline from 20gas

A random sample of the price of gasoline from 20gas stations in a region gives the statistics below. Complete parts a) and b) ybar = $3.59, s = $0.24 a) Find a 95% confidence interval for the mean price of regular gasoli ...

Satistics project come up with a survey pick a population

Statistics Project: Come up with a survey: Pick a population Come up with 4 variablesà 2 Quantitative & 2 Qualitative (make up numbers) Pick 50 data points for each variable, make a table on excel, use a scatter plot gra ...

A repeated-measures experiment comparing only two

A repeated-measures experiment comparing only two treatments can be evaluated with either a t statistic or an ANOVA. As we found with the independent-measures design, the t test and the ANOVA produce equivalent conclusio ...

It is estimated 30 of all adults in united states invest in

It is estimated 30% of all adults in United States invest in stocks and that 88% of U.S. adults have investments in fixed income instruments (savings accounts, bonds, etc.). It is also estimated that 25% of U.S. adults h ...

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?

Considering the effect that colonialism has had on the

Considering the effect that colonialism has had on the world today, how has and/or does Colonialism continue to affect the world? Choose one country or area that we have studied and discuss the continuing effects of colo ...

A sample of office assistants across the san francisco-bay

A sample of office assistants across the San Francisco-Bay Area was created. You want to build a model that will allow you to best predict a starting salary of potential new hires.  It was suggested that the data should ...

A random sample of 1260 adults living innbspnew york

A random sample of 1,260 adults living in New York city was asked (among other things) to name their favorite sports (to watch). Of the 670 females in the survey, 375 indicated that baseball was their favorite sport. Of ...

Calculated the correlation between outside temperature and

Calculated the correlation between outside temperature and class attendance. The regression equation for the data in that exercise is Attendance = 114.35 - .61 (temperature). Imagine that the weather forecaster predicts ...

  • 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