Conclusion that there is a difference in means

Assignment Help Basic Statistics
Reference no: EM13104760

The mean noise level of stroke floors in 20 different hospitals was 63.1 dBA, and the standard deviation was 4.1 dBA. The mean noise level for 24 hospital operating rooms was 56.3 dBA and the standard deviation was 7.5 dBA. At α = .05 can it be concluded that there is a difference in means?

Reference no: EM13104760

Questions Cloud

Difference between the means of a treatment : When testing for a difference between the means of a treatment and a placebo group, the computer display below is obtained. using a 0.05 significance level, is there sufficient evidence to support the claim that the treatment group (variable 1) co..
What is the potential energy of the pair of charges : Two point charges Q1 = +4.55 nC and Q2 = ?1.65 nC are separated by 50.0 cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of charges? What is the significance of the algebrai..
Confidence and prediction intervals for light bulb life : An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed. If a sample of 16 bulbs has an average life of 50 hours and the population standard deviation is known to be 10 hours.
What is the distance between deer a and c : Three deer, A, B, and C, are grazing in a field. Deer B is located 63.4 m from deer A at an angle of 53.0 ° north of west. Deer C is located 77.8 ° north of east relative to deer A. The distance between deer B and C is 93.3 m. What is the distance..
Conclusion that there is a difference in means : The mean noise level for 24 hospital operating rooms was 56.3 dBA and the standard deviation was 7.5 dBA. At α = .05 can it be concluded that there is a difference in means?
How learning about personal values clinical help to thoughts : The paper must explain what you are learning about personal and professional supposition about clinical helping and their relationship to own thoughts, values, past experiences, familiar and cultural background
How long does it take you to stop after the light turns red : You are driving to the grocery store at 20 . You are 110 from an intersection when the traffic light turns red. Assume that your reaction time is 0.50 and that your car brakes with constant acceleration.
Holding period return and confidence interval : You are looking at a bond to add in your portfolio. The bond has a 7.2 percent coupon (paid semiannually), 10 years left to maturity, and can be purchased at par ($1,000).
Exponential distribution with parameter lambda : Let T have the exponential distribution with parameter lambda, and let Y=Sqroot(T).

Reviews

Write a Review

Basic Statistics Questions & Answers

  Confidence interval in random sampling

A random sample of n=100 observations is selected from a population with mean of 29 and sandard deviation of 21. Approximate the probabilities shown below

  Probability of being deceptive

A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthf..

  Two variables that are likely to be correlated

What is an example of two variables that are likely to be correlated because they are both changing over time?

  Information about statistical quality control

Two mating parts have critical dimensions x1 and x2 as shown below. Assume that x1 and x2 are normally distributed with means 1 and mean2 and standard deviations s1 = 0.400 and s2 = 0.300.

  Description of compute a probability

An urn contains 8 balls identical in every respect except color. There are 4 blue balls, 3 red balls, and 1 white ball.

  What is the upper control limit

A school tracks the absences of pupils as part of a flu surveillance system. Regular reporting of absences among 25 students in grade 1 are taken, and based on these data, the long-run proportion of absences under normal conditions is estimated to..

  Poisson probability distribution

Recent crime reports indicate that 5.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.

  Deciding which of two machines to purchase

Suppose you were trying to decide which of two machines to purchase. Furthermore, suppose the length to which the machines cut a particular product part was important. If both machines produced parts that had the same average length, what other co..

  Construct a multiple regression model

So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.

  Probability for telecommunication problem

You are assigned to be part of a team of three analysts of a global management consulting company where of the entire work force of analysts. 55% have had no experience in telecommunications

  Test statistics utilizing chi square method

To find out the test statistics utilizing chi square method. A professional bowler has been having trouble 'hitting the pocket' in order to get strikes.

  Scholastic aptitude test

The scores of students taking the Scholastic Aptitude Test (SAT) are normally distributed with a mean u = 1035 and a standard deviation o = 131.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd