Testing assumptions

Assignment Help Basic Statistics
Reference no: EM13108912

For its validity, all hypothesis testing depends heavily on the assumption that the sample that is used was drawn using probability sampling techniques.

Why is this important?

What can you do if you just cannot use a probability sampling technique? (For example, suppose there is no good sampling frame available for the population of interest.)

Reference no: EM13108912

Questions Cloud

Illustrate how to compute beta for test : Use the significance level of alpha = .05 to test claim that p > .5. Sample is simple random sample n = 50. Illustrate how to compute beta for test and suppose true population proportion is .6.
Determining one-tailed and two-tailed tests : What is a one-tailed test? What is a two-tailed test? Explain at least three differences between one- and two-tailed tests. State a hypothesis related to this study that would cause you to conduct a one-tailed test. State a hypothesis related to th..
Compute the lowest-cost source of funding for glenwood : Compute the lowest-cost source of funding for Glenwood National Bank and the next cheapest source for borrowing over the next three days (today, tomorrow and the next day). Illustrate what are the relative advantages and disadvantages of each of t..
Find out the dh for the given reaction : find out the ΔH rxn for the given reaction as C 3 H 4 (g) + 2 H 2 (g) → C 3 H 8 (g)
Testing assumptions : For its validity, all hypothesis testing depends heavily on the assumption that the sample that is used was drawn using probability sampling techniques.
Spreadsheet model to find the best order quantity : The circulation manager of The New York Times in State College, PA is trying to decide how many copies of the upcoming Sunday edition of the paper to order so as to meet the demand of local customers.
Find adequate evidence to mean annual wage of people : Suppose that = $7600, is there adequate evidence to conclude that mean annual wage of people from this county is signicantly dierent than state mean?
Illustrate what happens if the data entered is wrong : Illustrate what happens if the data entered is wrong? Analytical tools suffer from the GIGO (garbage in, garbage out) weaknesses and thus an analysis based on these numbers can be flawed.
Compute the molarity of the solution : Compute the a)molarity of the solution, b)molality of the solution, c) mole fraction of Ammonia.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Dependent and independent samples

What are differences between dependent and independent samples? Provide examples. What are the implications for determining the tests used to analyze data?

  Statistics-quartiles-distribution

Find the third quartile Q3 of the list of 24 sorted values shown below. Which is relatively better: a score of 81 on a psychology test or a score of 50 on a economics test? Scores on the psychology test have a mean of 88 and a standard deviation of..

  Find the probability using pareto chart

Probability using Pareto chart - Evaluate the probability of randomly selecting an adult from the sample who doesn't always eat healthy foods because he or she has no time to cook or is confused about nutrition.

  Sampling distribution-proportion of first-time customers

The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers. Assume that the president is correct..

  Probability that a student worked a part time job

What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.

  Hypothesis test on correlation and regression

Please perform a hypothesis test using a .05 significance level on the following information. Next please perform a regression analysis as well as providing a scattered diagram.

  Chi-square test of goodness of fit-gender distribution

The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.

  Chi-square test - job pressure and age

A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.

  Weather and ground operations

Airlines monitor the causes of flights arriving late. 75% of flights are late because of weather, 35% of flights are late because of ground operations. 10% of flights are late because of weather and ground operations.

  Creating the decision tree

Create the corresponding decision tree and make recommendations.

  Linear regression forecasting model

Based on these data, does it seem that strength of relationship between sales and promotions expenditures is enough to permit using linear regression forecasting model? Describe why?

  Evaluate the t statistic for testing contrast

The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast

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