Explore BrainMass

Hypothesis Testing

Various Statistics Questions

1. Based on the specific question under study, how can one always determine which is the null hypothesis (H0) and which is the alternative hypothesis (H1). 2. A consumer advocate tests the claim that the Toyota Corolla actually delivers less than 32 mpg (as stated on the advertisements). So, we have:

Statistics - True and False

1. Degrees of freedom for the independent-measures t statistic can be computed as df = n 1 + n 2 - 2. True False 2. For an independent-measures study comparing two samples with n = 8 in each sample, the t statistic would have df = 15. True False 3. Which of the following rese

Hypothesis Testing Sufficient Evidence

Safe T cigarettes claim that their product has "low tar." Government standards are that this claim is invalid if there are more than 13.5mg tar per cigarette. A sample of five Safe T cigarettes gives 14.0, 13.7, 13.9, 13.8, and 14.1 mg of tar. Is there sufficient evidence at the alpha=0.05 significance level for the governmen

Statistics Clarification

1. The dependent and independent variables as they are not correct. Please advise. 2. Also, need advise on formulating the research question and developing the hypotheses Equation: The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an

Statistics and Single-Sample T-test

Equation: The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an average of $250.00 per purchase and perchance at least 2 to 3 items for working out and weight lost Assume that the population of consumers is normally distributed with mean M

Interpretation of a Statistical Test

Please help me with the following statistical problem: A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12. What is the correct interpretation o

Hypothesis Testing Verbal Results and Recommendations

Describe the results of the test and explain how the use of this hypothesis testing can be used to evaluate solutions to your research issue. Steadily rising transportations expend larger portions of the consumer budget. This test is specifically targeting funds spent on public transportation, gasoline, or toll fees. In orde

Hypothesis testing problem

This is a hypothesis testing problem. I have set up the null and alternative hypotheses. I need assistance in completing the requirements located at the bottom of the document. Steadily rising transportations expend larger portions of the consumer budget. This test is specifically targeting funds spent on public transportatio

Hypothesis Testing for One Population Mean of Systolic Blood Pressure

Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X. They picked one hapless employee and have a group of 14 volunteer nurses measured his systolic blood pressure and obtained the following results

Hypothesis Testing - Brands

I need assistance testing a hypothesis and identifying the solution/variance, details are included in the attachment. A driving machine was employed to hit a sample of 41 each of two different brands of golf balls using the same force each time. The research team then measured the distance between the point of impact and wher

Basic Statistics in PHStat..

- Using PHSTat - Send Excel + Paste into Word also * Must write out a NULL & HYPOTHESIS and include BUT WHAT DOES THIS MEAN TO A MANAGER?? See attached file for solution template.

10 Multiple Choice Questions in Statistics- Hypothesis

1. Whenever your decision is to reject the null hypothesis, there is a risk of a Type I error. True False 2. A Type I error occurs when you conclude that a treatment effect exists, but the treatment has no effect. True False 3. The critical region consists of extreme sample values

Business Statistics using PHSTAT add-in

See attached: Must use Excel with the PHSTAT add-in, and then paste all into MS Word. The manager of a paint supply store wants to determine whether the amount of paint contained in 1-gallon cans purchased from a nationally known manufacturer actually averages 1gallon. It is known from the manufacturer's specifications that t

Important information about Testing hypotheses by the Excel

Shank's Inc., a nationwide advertising firm, wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers. A random same of readers is shown ads of four different colors and three different sizes. Each reader is asked to give the particular combinatio

Hypothesis testing - Confidence Intervals

Problem. Test scores for class are: 93%, 77%, 90%, 85%, 86%, 81%, 88% At a = .10 can it be said that the standard deviation is greater than 4%. State (1) the null hypothesis (2) determine the critical value (3) determine the test statistic (4) State decision and summary Also, construct the 90% confidence interval for th

Insulation Factor and Heat Flux

HeatFlux Insulation 271.8 783.35 264 748.45 238.8 684.45 230.7 827.8 251.6 860.45 257.9 875.15 263.9 909.45 266.5 905.55 229.1 756 239.3 769.35 258 793.5 257.6 801.65 267.3 819.65 267 808.55 259.6 774.95 240.4 711.85 227.2 694.85 196 638.1 278.7 774.55 272.3 757.9 267.4 753.35 254.5 704.7 224.7 666.8 181.

Null and Alternative Hypothesis

The data in the table that follows was collected by a large car manufacturer concerning a new prototype car called the CIELO. Thirty carefully selected respondents were shown the car and fully briefed about its capabilities. Here is the data, which includes age (intervally scaled), sex (nominal), social status (interval scale ra


Managerial Research Design and Analysis. See attached file for full problem description. For all problems, State the H0 and H1. Perform the appropriate test and include your printout. state your conclusion 1. It is hypothesized that the mean for the variable family income in the lawn data set is $50,000. Can this claim

One- and Two-Sample Hypothesis Testing

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in our sample is anywhere from 6 to 12, we shall not reject the null hypothesis that p = 0.6; otherwise, we shall conclude t

One- and Two-Sample Hypothesis Testing

A manufacturer has developed a new fishing line, which he claims has a mean breaking strength of 15 kilograms with a standard deviation of 0.5 kilogram. To test the hypothesis that &#956; = 15 kilograms against the alternative that &#956; < 15 kilograms, a random sample of 50 lines will be tested. The critical region is define

Hypothesis Testing, Levels of Significance and P-Values

26. According to a dietary study, a high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is only 220 milligrams per day, which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of certain cereal has a mean sodi

Multiple choice questions related to Statistics

Use the following table when answering Questions 44 - 48: Data Indicates You Should: The Actual Situation: H0 is True HA is True Believe H0 Believe HA A C B D 44. The correct missing description of the conditions defined by cell A is a. Type I error committed. b. Type II error committed. c. you correctly beli

Sample Stats Study Guide

See attached file for full problem description. 33. A grocery store owner is interested in determining if the average weight of a package of ground beef sold in the store weighs one pound. An appropriate null hypothesis for this study is a. H0: &#61549; = 1 lb b. H0: &#61549; &#61625; 1 lb c. H0: &#61549; > 1 lb

Statistics Question

1. Define Regression Analysis and its real world applications. 2. Define ANOVA and its real-world applications. 3. ID/define the Greek Symbols: &#956; (mu) = &#931; (Upper Case Sigma = &#963; (Lower Case Sigma) = X2 (Chi Square) = &#945; (lower case alpha) = 4. Explain when its appropriate to use Parametric and Non-P

6 statistics questions: hypothesis tests, t-tests, z-tests, hypotheses

Question 1 Tests for butterfat milk content were performed on milk from a sample of 20 Holstein dairy cows. The sample mean was 3.88% and the standard deviation was .42 percentage points. Test at the 5% significance level whether the data provide sufficient evidence to conclude that the population from which the sample was take

Hypothesis Testing Population Proportions

Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of 588 depressed individuals is selected and treated with Resithan, and 201 find relief from their depression. A random sample of 417 depressed individuals is independently selected from the first sample and treated with Exemor, and 1

Hypothesis Testing and P-Values

The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment. A recent survey contained the question "How important to your life is having a fulfilling job?" Of the 264 college graduates surveyed

Hypothesis testing statistics

Chapter 10 in your text, exercise 10.24?High vs. Low Pressure Sales Tactics (Two Way ANOVA). Use Table 10.24 and Figure 10.13. Complete the exercise from the data given and answer all of the questions in a written summary. (Cut and paste any EXCEL data that you wish to discuss). See attached file for full problem descriptio

Hypothesis Testing and Levels of Significance: Pharmaceuticals

A study conducted by the research department of a pharmaceutical company claims that the annual spending (per person) for prescription drugs for allergy relief is greater than or equal to the annual spending (per person) for non-prescription allergy relief medicine. A health insurance company conducted an independent study and c