A social psychologist wants to know if people judge a person's attractiveness differently if they appear rich or poor. Two pictures were taken with the same model, one in expensive clothes standing next to a new sports car, and the other in old clothes standing next to an old hatchback car. In an online survey, participants were randomly divided so that they saw one of the two pictures and were asked to rate the model's attractiveness on a scale of 1 to 10. Which statistical test would be best to determine if there is a significant difference between groups? independent samples t-test was wrong

Q: In a random consumer survey, randomly selected drivers of Porsche, Mercedes, and BMW were asked to…

A: Solution:- from given information Null hypothesis H0: There is no difference among Porsche,…

Q: In the twentieth century, it was a common practice in Southern California for houses to be built…

A: a) State the hypotheses. Null hypothesis: H0: pl=p2

Q: In a study of whether taking a garlic supplement reduces the risk of getting a cold, participants…

A: The type of study conducted here Treatment-Control study in which we have two groups : one is…

Q: For this group of students, does the data suggest that the events "Spanish" and "Male" are…

A: Given   spanish French german boys 10 2 8 girls 15 12 3

Q: For each scenario listed on the left, determine whether the scenario represents an (a)Independent or…

A: Independent samples: The two samples are not related or paired, which are taken from two independent…

Q: Students in a high school statistics class wanted to see if the distribution of the colors of a…

A: From the provided information, Test statistic = 12.59 The p value is 0.05.

Q: A high school student is writing a report on which social media site, Facebook or Instagram, is…

A: Solution of this question is

Q: In the twentieth century, it was a common practice in Southern California for houses to be built…

A: From the provided information,

Q: A group of researchers wanted to determine if there was a difference in the predation habits of…

A: Given information: The data represents the values of the watering hole #1 and watering hole #2.

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

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

Q: After completing the experiment, Kendall wants to see if the difference between the averages for the…

A:

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

A: Dear student as per guidelines we answer the first three subparts only. Solution To find we will use…

Q: In a random consumer survey, randomly selected drivers of Porsche, Mercedes, and BMW were asked to…

A: Given: Porsche Mercedes BMW 10 8 0 8 6 4 6 10 2

Q: Harwood and Naylor (1969) wondered whether visual memory changes with age. A standardized test shows…

A: Given 83 63 59 63 55 65 66 60 80 69 65 68 87 69 70 89 68 77…

Q: In the twentieth century, it was a common practice in Southern California for houses to be built…

A: From the provided information,

Q: An experiment was conducted to compare anxiety levels among children induced between looking at…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: The economist wants to compare the hourly rates charged by automobile mechanics in two major cities…

A: The t-test for two means for independent samples is used to test whether there is any significant…

Q: Harwood and Naylor (1969) wondered whether visual memory changes with age. A standardized test shows…

A: Given that, The Sample size is, n = 52 The confidence level is, c = 0.92

Q: A developmental psychologist is studying bonding between healthy newborn babies and immediate family…

A: It is given that the number of categories (k) is 3.

Q: A major American pharmaceutical company has randomly sampled 14 customers who have had prescriptions…

A: All the people had heart rates of 55 prior to taking the drug. Sample size n = 14 Sample…

Q: In an independent samples design, two samples have the same sample size. The first sample has n = 6…

A: Obtain the value of the pooled variance for the two samples. The value of the pooled variance for…

Q: Do certain car colors attract the attention of the police more than others, so that they are more…

A: The observed frequencies are 16, 33, 39 and 32.

Q: The general manager of a chain of furniture stores believes that experience is the most important…

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

Q: Do athletes love cookies? As a follow up to a previous observation, the UM student decides that it…

A: The study is about to check whether athletes love cookies or not, the UM students decides that it…

Q: Can you tell me if my answer to this question on my homework assignment is correct and provide an…

A: Here A hypothesis test of a clinical trail has done comparing a new pain reliever for arthritis to a…

Q: The top 5 students of grade 10 section Oxygen class, James, Jessie, Jane John, and Jack, are so…

A: Given Information: James got the 90th percentile, Jessie got the 9th decile, Jane got the 3rd…

Q: Each year, marketing and information firm J. D. Power and Associates surveys new car owners 90 days…

A: (a). Comment on the graph: Blinding: The blinding in an experiment means the non-disclosure of the…

Q: In 2016, the Honors College at a large state university claimed that the average GPA of its…

A: The hypotheses are; H0: M ≥ 3.80 Ha: M < 3.80 This is a lower-tailed test.

Q: Does a statistics course improve a student's mathematics skills, as measured by a national test?…

A: Solution: What type of alternative hypothesis is appropriate for this research question? Ans: ⊙ One…

Q: Are mothers having their first child at an older age? The average age of a random sample of 36…

A: The z-test Two- Sample for means tool runs a two sample z-test means with known variances to test…

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

A: Solution: Define d=  Store 1 - Store 2 To find sample mean and standard deviation of d  n= 12 Sample…

Q: The newspaper in the previous problem decides to increase the size of its random sample of citizens…

A: Given Data: Previous sample size=250 New sample size=500

Q: A sociologist hypothesizes that the expected proportion of the number of children in certain family…

A: Null Hypothesis:   H0: All expected proportion of the number of children in certain family units…

Q: A Statistics teacher wants to know if students exposed to the use of technology in the classroom got…

A: The random variable score is normally distributed. There are two independent samples which are…

Q: When a person states at the outset of an experiment that a higher average score will be received by…

A: Given that :  The higher average score will be recevied by a group receiving some kind of treatment…

Q: A local school board wants to estimate the difference in the proportion of households with…

A: To construct the confidence interval about difference in two proportions, we must use z –…

Q: A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether…

A: Introduction:The sample proportion is a good estimator of the population proportion, if the sample…

Q: Prior to assessment of the outcome, the researchers did a manipulation check. Members of Groups 1…

A: Since you've posted a question with multiple subparts, we will solve the first three complete…

Q: The authors of a research article were interested in the effect on female viewers of watching movies…

A: (a) The degrees of freedom is,…

Q: A seven-year medical research study reported that women whose mothers took the drugDES during…

A:

Q: A researcher asks a sample of people about their attitudes toward marijuana legalization and…

A: It is given that  researcher asks a sample of people about their attitudes toward marijuana…

Q: Is there a significant difference in political ideology? (On this scale, 10 means "very…

A: Given data: Let X denotes the data regarding freshman. Number of freshman included in the sample,…

Q: Construct a 90% confidence interval for the difference in mean body esteem score for the video…

A: (a) The degrees of freedom is,…

Q: A random sample of 15 families representing three social classes has been observed for the frequency…

A: Solution :

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

A: The data shows the sales of the sales performance of two of her stores.

Q: practice in Southern California for houses to be built with pools in the backyard. For new homes,…

A: Given Level of significance ɑ=0.05 Hypothesis Ho: p1=p2 vs H1: p1>p2 (claim)( right tailed) Test…

Q: In a random sample of 1000 persons from town A, 400 are found to be consumers of wheat. In a sample…

A:

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

A: Given: Level of significance = 0.10 Day Store1 Store2 d 1 767 570 197 2 362 364 -2 3 741…

Q: The top 5 students of grade 10 section Oxygen class, James, Jessie, Jane, John, and Jack, are so…

A: The top 5 students of grade 10 section Oxygen class, James, Jessie, Jane, John, and Jack, are so…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.