Q23. A social psychologist records the number of outbursts in a sample of different classrooms at a local school. Answer the questions based on the statement below. (Note: These are not the results from Q19) 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 = .25. 23a. What was the sample size? n =  23b. What was the decision? A. Retain H0 B. Reject H0 Decision =  23c. What was the effect size? A. 39 B. 4.19 C. .05 D. .25 Effect size =

Q: You are considered to have an intellectual disability (ID) if you score in the lowest 2.5% of the…

A: Given data, μ=100 σ=15 P(X&lt;x)=2.5%=0.025

Q: A population has mean 18 and SD 6. What percent of samples of size 9 have a mean of 20 or more?…

A:

Q: 8. 50 randomly selected students were asked the number of pairs of games they downloaded on their…

A: Histogram: there are many ways of presentation of frequency distribution in the form of graphs. one…

Q: How often do you go out dancing? This question was asked by a professional survey group on behalf of…

A:

Q: Draw the line that best fits the data whose scatter diagram

A: Given:   x y 2.5 5.2 4 10.3 3.4 10.8 4.4 10.3 2.4 8.3

Q: Q2. A new purification unit is installed in a chemical process. Before its installation, a random…

A:

Q: 1. The total area of the shaded region of the t- distribution with sample of size n = 23 is 0.1 as…

A:

Q: In a sample of n = 4, three subjects have scores that are 1 point below the mean each. The 4th…

A:

Q: A researcher wanted to determine whether certain accidents were uniformly distributed over the days…

A: A researcher wanted to determine whether certain accidents were uniformly distributed over the days…

Q: The manager of Carrefour selected samples of 64 customers and computed the sample average amounts…

A: Given: Sample size, n = 64          If the average amount spent is normally distributed then we are…

Q: The following six advertising campaigns show the number of ads (x) and the resulting sales revenues…

A: Solution: x y (x-x) (x-x)2 (y-y) (x-x)(y-y) 10 49 0 0 5 0 6 41 -4 16 -3 12 16 49 6 36 5 30…

Q: How often do you go out dancing? This question was asked by a professional survey group on behalf of…

A: Given information Sample 1

Q: Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: The weight of four chickens is 5,6, 8, and 10 pounds. The means of each sample of size n=?. n is…

A: Here given that the data is : 5, 6, 8, 10 So sample size is n= 4

Q: A group of nutritionists is hoping to show that a new soybean compound has more protein per gram…

A: Roast beef has a mean protein content of 20 grams.

Q: If a researcher reported for a single-sample t-test that t(17) = 2.90, p&lt; 0.02, how many subjects…

A: The objective of the question is to determine the number of subjects in a study based on the t-value…

Q: What percentage of respondents have at least 6 pairs of shoes.B. 62% of all respondents that have…

A: In this context, X  denotes the number of pairs of Shoes. The total number of students is 65. Given,…

Q: II. Which of the following samples is a good representative of the described population? Why?

A: Simple random sample is when the items are randomly selected from the whole data.

Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean?

A: Given that: Sample standard deviation, s=9 Score, X=67 Z-score, z=1 To find: Value of sample mean

Q: See the picture below as it contains the information for the questions below. What is the…

A: Hypothesis testing : Hypothesis testing is a type of statistical inference that uses sample data to…

Q: sed on data from the U.S. Bureau of Economic Analysis). Tom ns to open a Cadillac car dealership and…

A: The claim is that the sample was drawn from a population with mean 13901. The null hypothesis is,…

Q: For the sample difference scores below, determine if the sample differs from D = 0. Use α = 0.01.…

A: To testH0:D=0H1:D≠0

Q: sample of 25 students who score a mean of 53. a. Shine claims that these students don't have very…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back…

A: Introduction: Denote μ1, μ2 as the true mean lower back pain levels before and after wearing the…

Q: • A researcher would like to evaluate whether a pain-relief patch designed for lower back pain is…

A: Paired t-test :  A t-test for two paired samples is a hypothesis test that attempts to make a claim…

Q: A doctor is concerned that a drug treatment causes people to run a fever.  She recruited n = 50…

A: Given Data: n=50   There is only one sample

Q: How often do you go out dancing? This question was asked by a professional survey group on behalf of…

A: From the provided information, The sample proportion can be obtained as:

Q: Suppose the class width is 2 ounces. What is the class midpoint of the class 3.0-4.9? a.  1.25 b.…

A: Here , we want to find the mid-point.

Q: 3. For the following situations identify: what is the sample and what is the size if given, what is…

A: given the  sample and size and population

Q: Which of the following will have the smallest margin of error? Note that n denotes the sample size.…

A: Margin of error is given by, MoE= Z*sigma/√n Where sigma is standard deviation and n is sample size.…

Q: In Sampling a large number of chocolate cake manufactured by a machine, the mean humber of defective…

A:

Q: The mean of the sample is always smaller than the mean of the population from which the sample wa O.…

A: To know about the mean of the sample

Q: who have credit cards was conducted. The survey only includes the number of credit cards per…

A: Given : Population mean : μ=4 Sample size : n=60

Q: How often do you go out dancing? This question was asked by a professional survey group on behalf of…

A: The test significance between the proportion of two samples are tested using the proportion test for…

Q: A professor believes that his math students have different IQ than the average college students. He…

A: Given that, The random variable X is normally distributed. And sample size is 30=~ infinite so we…

Q: Dr. Star is interested in whether the physical coordination skills among low-income pre-schoo.…

A: Given μ=120, σX=10, X=122, n=80

Q: How large a sample is needed to estimate the population proportion for each of the following?a. ME =…

A: Sample size required to estimate the population proportion is: n=p×1-p×Zα/2ME2 where, p is the…