A social psychologist records the number of outbursts in a smaple of different classrooms at a local school. Based on the statement below, what are the sample size, decision (retain or reject the null hyp), and effect size in this study? The number of outbursts among students at this local school (M = 3) was significantly less than that in the general population, t(39) = 4.19, p < .05 (d = 0.25)

Q: In the US,  46.8% of all people have type O blood,  39.3% have type A blood, 10.4% have type B blood…

A: Given:   Outcome Observed frequency O 1685 A 1413 B 353 AB 133 Total 3584

Q: A study was conducted to explore the possibility of a audiobook treatment effect on sleep quality…

A: A study is provided and the objective is to answer the given questions.

Q: A college department pilots a New program with 9 of its 20 students and compares income in each…

A: The following data is provided:  New  Old 144 98 18 64 45 80 70 23 341 0 66 11 34…

Q: A filling machine for a production operation must be adjusted if 5% of the jars are under- or…

A: Given: The sample number of jars is n=100. The number of jars that are under and overfilled is X=7.…

Q: A magazine subscriber study asked, "In the past 12 months, when traveling for business, what type of…

A: For testing whether the type of tickets purchased is independent of the type of flight, the observed…

Q: A newly installed automatic gate system was being tested to see if the number of failures in 1,000…

A: The data is given asTruckEntry failuresExit failures1445024053355554565656255652507455184547sample…

Q: ner together seven nights a week has decreased? Use the a = 0.05 significance level. cause npo (1-…

A: We have given that  Sample size n = 1126 Favorable cases x = 305 Sample proportion p^=x/n

Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…

A: a. Denote p1, p2 as the true population proportions of wildfires caused by human in south and west,…

Q: O224 O 124 O238 176

A: GIVEN DATA, p=0.169CI=0.90α=1-0.90=0.10E=0.04

Q: In the US, 44.8% of all people have type O blood, 40.8% have type A blood, 11.3% have type B blood…

A: a. The expected frequencies are, Outcome Frequency Proportion Expected frequency O 1317 0.448…

Q: An amusement park studied methods for decreasing the waiting time (minutes) for rides by loading and…

A: From the information, given thatLet Factor A denotes the method of loading and unloadingLet Factor B…

Q: A new brand of shoes joins the market. Sprinters are wondering which brand they should get, or if it…

A: Denote μ1, μ2 as the population mean times to run for 100 m using first and second brand,…

Q: A shareholders group is lodging a protest against your company. The shareholders group claimed that…

A: Test - stats (t) = x¯-μsn

Q: In the US, 43.5% of all people have type O blood, 39.7% have type A blood, 11.9% have type B blood…

A: Outcomes Frequency O1271A1123B328AB158Total2880

Q: A high school principal wanted to know if there was a difference in absences for 9th grade, 10th…

A: The data shows the absences for 9th grade, 10th grade, 11th grade, or 12th grade among students with…

Q: A study claims that adults spend at most 16 hours a week on club activities. A researcher wanted to…

A: Given,sample size(n)=5sample mean(x)=17standard deviation(s)=5

Q: Stacy conducts a study to look at the effects of season (fall, winter, spring, summer) and type of…

A: Two way ANOVA:   From the given information, the data view of the given variables is,     fall…

Q: BMIS hypocaloric diet and pre-meal water intake significantly lowers BMI. and 29.5, respectively.…

A: Solution: Given that :  The 95% confidence interval for the mean difference in tremor amplitude is (…

Q: Suppose we are testing the hypothesis that occurrence of five types of viruses (A, B, C, D and E) is…

A: Answer: From the given data, Number of rows (r) = 5 which are A,B,C,D and E Number of columns (c) =…

Q: Use the following to answer questions 2-12.   A high school principal wanted to know if there was…

A: The data shows the absences among the four grades.

Q: Suppose we are testing the hypothesis that occurrence of five types of viruses (A, B, C, D and E) is…

A: Answer: From the given data, Number of rows (r) =5 Which are: A,B,C,D and E Number of columns (c) =…

Q: 1)Calculate the Sum of Squares total (SStot) 2) Calculate the Sum of Squares Between Groups (SSBG)…

A: The data shows the absences for 9th grade, 10th grade, 11th grade, or 12th grade among students with…

Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

A:

Q: Does this sample provide evidence that the grocery store manager overstated the true proportion?…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: Given Solution:

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

Q: In a survey of 247 households, it was found that 168 owners had a dog as a pet. In a survey of 282…

A:

Q: effect size of .7 and you want your power to be .40 ( significance level = .05)?

A: Given: Effect size, ES = 0.7 Power = 1 -  = 0.40 Significance level,  = 0.05 Sample size n = ?

Q: Insurance companies track life expectancy information to assist in determining the cost of life…

A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: A travel agency is interested in finding out if different age groups frequent different Spring Break…

A: There are two categorical variables which are age and destination. Age has freshman, sophomore,…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: A researcher was comparing the differences between only two groups using a t-test. Would Post Hoc…

A: Given: A researcher was comparing the differences between only two groups using a t-test.

Q: (d) A sample of 800 workers indicated whether they are single or married and whether they work…

A:

Q: Dependent-samples t-test. A researcher wants to examine if play therapy can be an effective…

A: (a) The null hypothesis is a simple statement about the value of the population parameter which is…

Q: For a certain year, a study reports that the percentage of college students using credit cards was…

A:

Q: er the age of 18 who eat dinner toget than the level of significance. Theref an the level of…

A: Given data number of success , x= 515.0 sample size, n = 1172 population…

Q: In the US, 45.1% of all people have type O blood, 39.6% have type A blood, 10.9% have type B blood…

A: H0: The distributions of blood types are the same between the general population and the…

Q: ker's age ranged from 25 to 34 years. The data set also contained information on the region of the…

A: Solution: n= 3658 observation   k= 3 indepedent variables.  The change in estimated regression…

Q: A shareholders' group is lodging a protest against your company. The shareholders group claimed that…

A: From the given information, Sample size n =62 the Sample mean, x̅ =9.3 years the Sample standard…

Q: A professor wants to know which type of instructional mode students had more satisfaction.  The…

A: Given: n=5

Q: A recent study looked at the relationship between condom use and the spread of AIDS, by following…

A: (1)Here, the claim is that the proportions of partners who became infected with HIV are different…