Hypothesis-sampling distribution-critical value

Reference no: EM13110074

The Smoky Bear Trucking Company claims the average weight of a fully loaded moving van is 12,000 lb. The highway patrol decides to check this claim. A random sample of 30 Smoky Bear moving vans shows that the average weight is 12,100 lbs, with a standard deviation of 800 lbs. Construct a hypothesis test to determine whether the average weight of a Smoky Bear moving van is more that 12,000 lb. Use a 5% level of significance.

a. State the null and alternate hypothesis.

b. Identify the sampling distribution to be used (Normal, Student t, or binomial)

c. What is the critical value?

d. Decide whether to reject or not reject the null hypothesis at the given significance level.

e. Explain your conclusion is simple non-technical terms.

Reference no: EM13110074

Questions Cloud

Determining degree of freedom : What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?

Create scatter diagram with total number of shipments : Boston Electric Generators has been getting many complaints from its major customer, Home Station, about the quality of its shipments of home generators

Determine the probability the sample mean is equal to value : Suppose the distribution of amounts purchased follows normal distribution. For sample of 50 customers, reply the following questions. Determine the probability the sample mean is at least $25.00?

Personality assessment instrument or inventory : Select one psychological personality assessment instrument or inventory to serve as the basis of this assignment. Explore the psychological literature to find three to five articles that test the use of this inventory or assessment on obsessive-com..

Hypothesis-sampling distribution-critical value : The Smoky Bear Trucking Company claims the average weight of a fully loaded moving van is 12,000 lb. The highway patrol decides to check this claim.

Explain why modern social scientists : Explain why modern "social scientists" such as anthropologists, economists, psychologists, and sociologists often err in their conclusions about the nature of man and his society.

What is the null hypothesis for study : A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.

Strategy for statistically testing new diabetics drug : Let's say I have a new drug that I think helps diabetics. So I perform clinical trials in accordance with the FDA requirements. I give one randomly selected groups of diabetics the drug, and another sample gets a placebo pill.

How mant offspring are expected to have the genotype : 125 progeny were produced from the following cross: aaBbCcDd x AaBbccDD. Assume that all the genes are unlinked, and that the uppercase letters represent dominant alleles.

User Account

All Pages