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Hypothesis Testing

Statistics: Large school district analysis of recent curriculum experiments

See attached data file. Scenario Assume that you are working on a team that has been commissioned by a large school district to collect and analyze data related to a recent curriculum experiment designed to improve student scores on statewide-standardized tests. The schools in this district are predominantly large, urban s

Analyze study examining the efficacy of nasal spray vaccine

The data below are from a study examining the efficacy of nasal spray vaccine in preventing the flu in children. Please analyze these data to determine if the vaccine is effective in preventing the flu. Vaccine treatment group 14 - Developed flu 1056 - Did not develop flu Placebo Group (no vaccine) 95 - Developed flu 43

Hypothesis testing

Test a claim that the mean amount of waste generated by adults is > 4 lbs a day. My random sample of 22 adults had a mean of 4.5 pounds with a Stan. Dev. of 1.21 pounds. At a level of significance of 0.01, can I support the claim?

Null Hypothesis Testing

Can you please help me with the following questions? I have to write a paper in APA format and this is part of the paper is what I'm stuck on. Thank you in advance. 1.) Explain the purpose of null hypothesis testing and provide examples of hypothesis that may be tested with the data set. (attached is the data). 2.) Exp


1. True or false, and explain: (a) The p-value of a test equals its observed significance level. (b) The alternative hypothesis is another way of explaining the results; it says the difference is due to chance. 2. Five hundred draws are made at random with replacement from a box of numbered tickets; 276 are positive. So

Applied Statistics for Health care

It was a good start addressing the introduction to hypothesis testing process. However, it is missing an important part which is the approach of measuring the difference in behaviors between the 2 generations, What is your approach? Also, what about the other components of hypothesis testing such as confidence level?

Hypothesis Testing: Sensory Discrimination

** Please see the attached file for the complete problem description ** Please help complete the enclosed data analysis Sensory Discrimination Please help me to numerically, summarize the results and analyze the data. The data is Alice's results of whether she knows the difference between Coca Cola from Pepsi. She claims

These are Statistics 1 problems on the topics-Introduction to the t Statistic and The t Test for two independent Samples from Chapters' 10 & 11 of Statistics for the Behavioral Sciences text Book 8th edition. By Gravetter & Wallnau

Problem Set 1: Chapter 10: problems 2, 14, 22, 24; Chapter 11, problems 2, 4, 12, 20 Chapter 10 2. Describe what is measured by the estimated standard error in the bottom of the independent measures t test. 14. Do you view a chocolate bar as delicious or as fattening...? Males Females n = 6 n = 9 M = 31 M = 45

Applied Statistics for Health Care

Can anyone give me 2 or more examples of a comparison between the old times and the present day? For example: Why do people care about their weight in the present day than in the olden days? Can you formulate a hypothesis similar to this statement that can be tested, and how would it be tested?

Applied Statistics for Health Care

Researchers routinely choose a-level of 0.05 for testing their hypotheses. What are some experiments for which you might want a lower a-level (e.g. 0.01)? What are some situations in which you might accept a higher level (e.g. 0.1)? Why? Suppose you hear an "old-timer" say, "Why, in my day, kids were much more respectful and

Hypothesis Testing Problems for University Sexism

Use the Student_Data.xls file which consists of 200 MBA students at Whatsamattu U. The file includes variables regarding students' age, gender, major, GPA, Bachelors GPA, course load, English speaking status, family, weekly hours spent studying. Each of the three assigned problems should be formatted as a one page memo. Answers

PB 7.9 Rank of birth and age at oncet (Biostatistics)

The corresponding notes are on chapter 7 (Page 216) :,_Fisher_L.D.,_Heagerty_P.J._Biostatistics._A_methodology_for_the_health_sciences_(2004)(2nd_ed.)(en)(871s).pdf Following is the problem to solve: PB 7.9 McKeown et al. [1952] investigate evidence that the environment i

Question about Applied Statistics Health Care

1) Kindly explain to me the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented 2) How large would a population have to be for a sample to be appropriate (i.e., rather than measuring the whole population)

A fictional statistical representation of school lunch programs

I need help with a fictional statistic example of schools with low, med, and high participation in free school lunches. The question would be: Does the level of participation of free lunch programs in schools make a difference in the children's actual participation? This example will need to include a description of the 5-ste

Distribution of IQ Scores

IQ scores have u = 100 and o = 15. The distribution is normal. A new drug is touted as having the effect of raising IQ by 10 points and we recruit a sample of n = 36 people to test it on. Using a=.05, how much power will we have? Please show work. What is the probability of randomly selecting a red haired person from th

Case Study Data Analysis

I am trying to understand how to analyze the attached spreadsheet so I can explain to class mates. there are four tabs that I need help on

Need help understanding info given for a statistics word question For this exercise, use n = 100 and the normal distribution with mean 50 and standard deviation 10. Each time you click on ââ?¬Å"Simulate,ââ?¬Â? the applet runs 100 hypothesis tests with the conditions you have set and reports the number of t

Null Hypothesis and Alt Hypothesis

At a college, two professors, Saber and Tooth, are each teaching large sections of introductory statistics with 500 students in each section. They decide to compare the results from their first exam. It would be too cumbersome to compare all 1000 students, so the decide to select a random sample of 50 students from each section.


Hi, I would like you please solve the posted problem using the t-test. Could you please use the following variables: ( PCREV) and (TDAYS). Could you please write a question (Hypothesis)? before solving the problem? Could you please write the Hypothesis, Null, and Alternative clearly? After you solve it could you wri


1. Sandy's Pizza has generally assumed that the mean age of its customers was 30 years of age or younger. A random sample of 50 customers revealed the following: X-bar=30.76 years and s=3.6 years Does the sample data provide sufficient evidence to conclude that the mean age of Sandy's customers is greater than 30 years

3 Null and alternative hypotheses questions

In hypothesis testing, the null hypothesis is tested and a decision is made as to whether to reject or not reject the null hypothesis. Then the conclusion must be stated in terms of the problem being studied. Determining the null and alternate hypotheses sometimes presents problems for students. This discussion activity will giv

Hypothesis Testing of Mean Recent Reports

a recent news report indicates that the mean (Ã?µ) number of years that first-time drug offenders are sentenced is 10.65. The sample of 31 court records from your county indicated a mean number of years = 12.22 with a standard deviation of 3.26. Assume you are working at the .05 level of significance A)State the appropriate n

1. State an appropriate null hypothesis 2. Indicate the level of significane 3. Identify the critical value 4. Calculate the test statistic 5. Evaluate the test statistic in light of the critical value 6. Make a decision about the null hypothesis

See attached files. A researcher would like to determine whether humidity can have an effect on eating behavior. It is known that under regular circumstances, laboratory rats eat an average of µ = 10 grams of food each day. The researcher selects a random sample of n=15 rats and places them in a controlled atmosphere room

Hypothesis Testing and Confidence Intervals

Your manager has speculated the following: a. the average (mean) annual income was less than $50,000, b. the true population proportion of customers who live in an urban area exceeds 40%, c. the average (mean) number of years lived in the current home is less than 13 years, d. the average (mean) credit balance for suburban c

Hypothesis Testing II: One Sample Hypothesis Tests

1. Recall that “very satisfied” customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42. a

5 Step Hypothesis Test

Perform a 5 step hypothesis test on the given data for the following null and alternative hypothesis: Null Hypothesis - TB is greater in the US than foreign countries between 1993-2009 Alternative Hypothesis - TB is less in the US than in foreign countries between 1993-2009.