The following data compares the statistics scores from 2 groups of students who were randomly sampled at the beginning of the study, and then randomly assigned to treatment conditions. One group of students was sleep-deprived and one group of students got a normal night's sleep. Sleep Normal Deprived Sleep 45 79 55 52 67 84
Statistical aptitude scores are known to be normally distributed, with mean = 50. A researcher has designed a new program intended to improve studentsââ?¬â?¢ statistical aptitude, and has enrolled a sample of 30 students in it. The researcher then collects studentsââ?¬â?¢ statistical aptitude scores at the end of the p
See the attached file for table format. Statistics - 40 General Questions True/False - Please type True or False in the box to the right of the statement. 1 Based on a classical approach, the probability of an event is defined as the number of favorable outcomes divided by the total number of possible outcomes. 2 On
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
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
See the attached files. 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 ti
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?
** 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
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?
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
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
I will like the have these stat question solve for me.They are in Chp. 9 in this book Statistics for the behaviral Sciences 8th eds.
Problem Set 1: Chapter 9, problems 4, 12, 14, 22 4. Explain why t distribution tend to be flatter and more spread out than the normal distribution. 12. Last fall, a sample of n = 36 freshmen was selected to participate in a new 4-hour training program: µ = 74; M = 79.4, s = 18. a. On the basis of these data, can the co
The corresponding notes are on chapter 7 (Page 216) : ftp://188.8.131.52/books/DVD-009/van_Belle_G.,_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.  investigate evidence that the environment i
Need help with 20 questions on One-Sample and Two-Sample Tests of Hypothesis.
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)
COMPLETE PROBLEM 1: It is pretty common across most schools to find the grades at the MBA level divided between A's and B's. As such, you expect the mean GPA to be around 3.50. Using the sample of 200 MBA students, conduct a one-sample hypothesis test to determine if the mean graduate GPA is different from 3.50. Use a .05 signif
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
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
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
http://media.pearsoncmg.com/ph/esm/esm_mcclave_sbe10e_09/applets/meanht.html 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
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.
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
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
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
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
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
See the attached file. 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 XY
Perform a 5 step hypothesis test on the given data for the following null and alternative hypothesis: Null Hypothesis - TB is greater in the U.S. than foreign countries between 1993-2009 Alternative Hypothesis - TB is less in the U.S. than in foreign countries between 1993-2009. See the attached files.
See the attached file.