True population mean number of accidents

Assignment Help Basic Statistics

Reference no: EM131001505

The table below, from Lucas (1985)9 , shows the number of accidents occurring per quarter (three months), over a 10-year period, at a DuPont company facility. The data set is divided into two periods: Period I for the ?rst ?ve-year period of the study; Period II, for the second ?ve-year period.

5	5	10	8	3	4	2	0
4	5	7	3	1	3	2	2
2	8	6	9	7	7	1	4
5	6	5	10	1	2	2	1
6	3	3	10	4	4	4	4

(i) Perform appropriate tests to con?rm or refute the hypothesis that the true population mean number of accidents in the ?rst period is 6, while the same popu- lation parameter was halved in the second period.

(ii) Separately test the hypothesis that there is no signi?cant difference between the mean number of accidents in each period. State any assumptions needed to answer these questions.

Reference no: EM131001505

Questions Cloud

Appropriate probability model for the population : Using an appropriate probability model for the population from which the data is a random sample, obtain a precise 95% con?dence interval for the mean of this population; use this interval estimate to test the hypothesis by the Editor-in-Chief that..

What is the maximum power output of the resistor : Determine the resonance frequency for the circuit in the figure.(Figure 1). If the signal generator was capable of a peak voltage output of 18 V , what is the maximum power output of the resistor?

Difference in the unemployment status of the alumni : Does having an advanced degree make any difference in the unemployment status of the alumni of this University? Support your answer adequately.

What are some of difficulties with quantifying credit risk : Why is it important for bank managers to quantify credit risk? What are some of the difficulties with quantifying credit risk

True population mean number of accidents : Perform appropriate tests to con?rm or refute the hypothesis that the true population mean number of accidents in the ?rst period is 6, while the same popu- lation parameter was halved in the second period.

What is the distribution of the stock price at time two : What is the distribution of the stock price at time 2? What is the expected value at time 2? Is this process a Markov process, martingale, submartingale, supermartingale?

Calculate the accounts receivable turnover ratio : Calculate the accounts receivable turnover ratio and the average collection period for the year.

How far from focal-length lens must an object be placed : How far from a 41.0-mm-focal-length lens must an object be placed if its image is to be magnified 3.50 and be real? Express your answer to three significant figures and include the appropriate units.

Sample of viscosity measurements : The data set below, S10 , from Holmes and Mergen (1992)6 , is a sample of viscosity measurements taken from ten consecutive, but independent, batches of a product made in a batch chemical process.

User Account

All Pages