Decision regarding the null hypothesis

Reference no: EM1389851

A vinyl siding company claims that the mean time to install siding on a medium-size house is at most 20 hours with a standarddeviation of 3.7 hours. A random sample of 40 houses sided in the last three years has a mean installation time of 20.8 hours.

1) At the 0.05 significance level, can a claim be made that it takes longeron average than 20 hours to side a house?

2) State the null and alternate hypotheses

3) State the decision rule

4) Compute the value of the test statistic

5) Formulate the decision rule

6) What is your decision regarding the null hypothesis and interpret.

Reference no: EM1389851

Questions Cloud

Elementary statistics problem : An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula.

Electrical activity of a simulated neuron and the fast block : Describe the similarities between electrical activity of a simulated neuron and the fast block to polyspermy that occurs during fertilization in sea urchins.

Proportion of voters which has changed : After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate; 480 were in favor of the Republican candidate; 40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of..

Relative frequency-patient weight and surgical recovery : A medical research project examined the relationship between the subject's weight and recovery time from surgical procedure, as shown in the table below.

Decision regarding the null hypothesis : What is your decision regarding the null hypothesis and interpret.

Major function of the thalamus : The thalamus is a brain structure that constantly recieves incoming visual, auditory, olfactory, tactile, thermal, and nociceptive sensory data at any given instant.

Organize the data in frequency distribution : The Quick Change Oil Company has a number of outlets in the Seattle area. The daily number of oil changes at outlet in past twenty days are:

Release of the contents of cortical granules : Briefly compare similarties in the release of the contents of cortical granules during the fertilization of the sea urchin ovum, with the release of neurotransmitters from terminal knobs of a stimulated neuron.

Applied business statistics test : The following data represent scores of 50 students in the applied business statistics test. Prepare the frequency distribution table and the frequency histogram for this data set.

User Account

All Pages