Determining population means

Assignment Help Basic Statistics
Reference no: EM13110258

At the 10% level of significance, does the following sample evidence indicate that the two population means are equal? Assume the populations are normally distributed.

Sample 1: n = 21 = 10 s = 2.15

Sample 2: n = 25 = 12 s = 3.90

HINT: Since both of the samples are small, you must first determine whether the two population variances are equal so that you will know which formula (pooled standard deviation or not) to use for your hypothesis test.

Reference no: EM13110258

Questions Cloud

Describe sameday delivery manufacturing process : Describe FedEx Office and SameDay delivery manufacturing process and scheduling approach. You are consulting with a company that is failing. It seems the CEO (recently fired) paid no attention to the board of directors.
Inferences about two proportions : A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed.
Determine monetary multiplier : The public's preference is to hold their money as half cash, half demand deposit. Reserve requirement is 25%. Determine monetary multiplier.
Hypothesis testing-proportion of survey response : A total of 61,647 people responded to an Elle/ MSNBC.com survey. It was reported that 50% of the respondents were women and 50% men.
Determining population means : At the 10% level of significance, does the following sample evidence indicate that the two population means are equal? Assume the populations are normally distributed.
Impact of globalization creation of small businesses : Education is often used as an indicator of a person's socioeconomic status. Historically, the number of years of schooling completed has been recorded in the census of population as a measure of education.
Cowboys games during the 2010 season : Would there be a cost to you to attend the Cowboys' games during the 2010 season and is anything puzzling about Falk's pricing pattern?
Multiple choice questions - quality control : A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standar..
Determine the optimal solution to problem : Let the following linear programming problem: Determine the optimal solution to this problem. Convert this problem standard LP form.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Probability of a fatal accident over a lifetime

The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your rea..

  Confidence interval of the true mean age

In a study of 24 criminals convicted of antitrust offenses, the average age was 55 years, with a standard deviation of 7.6 years. Construct a 98% confidence interval of the true mean age.

  Confidence interval estimate for population proportion

Results from survey of 1000 respondents, point out that 545 favour the dealth penalty for capital crimes. By using a90% confidence level. Create confidence interval estimate for population proportion.

  Question on poisson distribution

An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days.

  Statistic value for two mean tests using equal variance

Find the test statistic value for two mean tests using equal variance formula.

  Specific heat capacity of the metal

Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat capacity of the metal?

  Determine sampling distribution of sample mean

A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is

  Calculate z value for given data

A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a colour television is $90 with a standard deviation of $22. Monte's TV Sales and Service completed repairs on two sets this morning. The labor cost for the..

  Determine sample size-standard iq points

A standard IQ test has mean of 98 and a standard deviation of 16. We want to be 99% certain that we are 8 IQ points of the true mean. Determine the sample size.

  Test of regression coefficient using spss

Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?

  Hypotheses test and single mean

A sample of 25 students enrolled in the university indicates that X (bar) = $315.4 and s = $43.20.

  Explaining relationship between total gross-opening gross

Explain the relationship between total gross and opening gross total gross and number of theatres  total gross and week in top 60.

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