1. A test of hypothesis is always about:
a. population parameter
b. sample statistic
c. a test statistic

2. A critical value is the value
a. calculated from sample data
b. determined from a table (e.g., normal distribution table or other such tables)
c. neither a nor b

3. A two-tailed test is a test with:
a. two rejection regions
b. two non-rejection regions
c. two test statistics

1. The manufacturer of the X-15 steel-belted radia truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for their trucks is 59,500 miles. Is Crosset's experience different from that claimed by the manufacturer at the .05 significance level?

2. The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?

3. A recent article in the Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent):
4.8 5.3 6.5 4.8 6.1 5.8 6.2 5.6

4. At the .01 significance level, can we conclude that the 30-year mortgage rate for small banks is less than 6 percent? Estimate the p-value

Solution Summary

The solution looks at population parameters and sample data calculated as it pertains to statistics.

View the "Sampling Distribution of the Mean" within a Multimedia Presentation.
InteliBoard Assessment
1. The mean of the sampling distribution is equal to
a. the population standard deviation
b. the sample mean
c. the sample standard deviation
d. the population mean
e. none of the above
2. The standard error of t

In research (quantitative or qualitative) you will almost always find it is important to sample. Please explain why sampling is important and its implications in the knowable/unknowable debate.
Consider in you response how the concepts of a population (and its associated parameters) and the sample (and its associated estimat

NOTE: You may use MS Excel for this assignment to minimize time spent on it. Please show all the work unless stated otherwise.
1. Retrieve the CANSIM II data set with Vector V122497 taken from 2003/06/01 to 2008/05/31 from the CANSIM II website through library website. You should find 60 data points on the mortgage lending

1. Parameter is used to refer to a ?_______ value
2. A population is all of something about which an ?_______is to be made.
3. Statistics may be used to refer to a ? ______value.
4. When we want to minimize the effect of one or more extreme scores, we should use the ? _______ to represent the average score of the di

The following sample was obtained from a population with unknown parameters. Scores: 6, 12, 0, 3, 4
a. Compute the sample mean and standard deviation. (Note that these are descriptive values that summarize the sampledata.)
b. Compute the estimated standard error for M. (Note that this is an inferential value that describe

What are the characteristics of a population for which it would be appropriate to use mean/median/mode? When would the characteristics of a population make them inappropriate to use?

Can you help me with statistic questions?
*The standard deviation of a point estimator is called the _______? (A) standard error (B) sample mean (C) population standard deviation (D) probability distribution
*The t-distribution can be used with small samples for establishing confidence intervals for the population mean, pr

1) Determine whether the evaluated group is a population or a sample
a) Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer.
b) An investigation of 150 randomly selected local restaurants concluded that 42%

Can you help me with some True / False questions on statistics? I think I am reading too much into the question for True / False.
*Variation in the population has little if any effect on the amount of sampling that will be experienced?
*Parameters are numbers that can be used to describe characteristics of population?
*

Using the data attached, perform the following:
Imagine that you have populationdata with an average height of 5 feet 10 inches. Conduct a one-sample t-test to determine whether your samplepopulation is significantly different from the general population.
Imagine that you have populationdata with an average satisfaction