A researcher studies the effects of guilt on memory. First, subjects perform a very boring task for one hour. Then each subject is instructed to tell the next subject either (a) that the experiment took one hour and they found it very boring, or (b) that the experiment took one hour and was very interesting. After that, each subject is asked to study a list of words and are tested on memory for the list. 30 subjects are randomly assigned to one of the two conditions. In order to see whether the experimental manipulation has any effect on memory, which would be the proper statistical test? A)a related sample t-test-test 
 B)an independent sample t-test 
 C)a z test                      
 D)a one sample t

Q: In a study of whether smoking causes lung cancer, researchers examined 2000 people.  About half of…

A: Four percent of the smokers developed heart disease by the end of the study period, whereas only one…

Q: An experimenter wanted to explore the relationship between memory and distraction. Specifically, she…

A: Introduction: The given study is a designed experiment.

Q: A researcher wished to find out whether the perceptions of a persons height depends on that person’s…

A: The objective of the researcher was to find whether the perception of a person's height by the army…

Q: A geography test was given to a simple random sample of 500 high-school students in a certain large…

A: The number of individuals who participated in the investigation is 500. The individuals were asked…

Q: If the experiment is repeated 1500 more times, about how many times would you expect Brody to remove…

A:

Q: (a) Find the confidence limits at a 99% CI for  these two independent samples.  (b) Can we conclude…

A: Let us assume the variables as- x: Group gesture y: Group no-gesture The data is given as- x y…

Q: 6. The table below shows the results of a survey of drivers who were asked to name the most annoying…

A: Talking on cell phones = 44 %  6 person randomly selected to participate  We have to calculate…

Q: A clinical psychologist

A: independent variable = Number of tasks performed simultaneously  dependent variable = Number of…

Q: A researcher wanted to see if crowds affect one's willingness to help oneself and/or others. A total…

A: The objective of the question is to identify the appropriate statistical test to analyze the data…

Q: Start with a deck of 64 cards—16 cards in 4 suits. Ask a person to think of card. Your task is to…

A: The amount of information uncertainty in the single card,  Hs= log2N  Here total cards are N= 64 Hs=…

Q: The way in which response options are presented in a question can affect a person's response. Four…

A: Total sample size [N] = n1+n2 = 200+200 = 400

Q: b) Determine the correct hypotheses for the claim that Fiona wants to test.

A: Fiona is the course authority for a particular university course. In this course, students submit an…

Q: Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to…

A: It is given that,Sample mean = 2.35.Population standard deviation, sigma is 2.5.The sample size, n…

Q: Researchers conducted a study to find out if there is a difference in the use of online-learning by…

A: The claim is that there is a difference in the use of online learning by different age groups.

Q: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the…

A: The objective is to find out which among the following statement is correct when Dr. Guidry…

Q: You plan to conduct a factorial experiment in which there are three levels of Variable A and four…

A: The variable A has three levels and variable B has four levels. That is, there are two factors 'A…

Q: You are designing an experiment using human subjects. The study will include 30 participants. Of…

A: According to the combination rule, if r distinct items are to be chosen from n items without…

Q: Ms. Eisenman wanted to know her average student’s score on the most recent chapter test and what…

A: Ms. Eisenman wanted to know her average student’s score on the most recent chapter test and what…

Q: r. Moas is interested in examining how environmental cues affect memory. She asks 15 students to…

A: A B C 9 9 6 8 8 7 10 7 5 8 8 6 9 7 4

Q: A local superstore sells a "forget me not pill" that is suppose to help recall. I find that some of…

A: In order to determine whether the forget me not pill improves memory or not, conduct a two mean…

Q: Suppose that in a survey of five-year-olds, 54% liked the letter A, 58% liked the letter B, and 49%…

A: Solution:robability of liking A  P(A)=0.54 Probability of liking B  P(B)=0.58 Probability of liking…

Q: Use the following information for the five questions below. A researcher is interested in whether…

A: Hypothesis is the statement of population parameter. There are two types of hypothesis statements.…

Q: You're a data analyst for an insurance company. You want to make sure that your employer is not…

A: There are two independent samples which are Bubba and Merle. We have to test whether prices are…

Q: est whether there is a significant difference between the computer method and the phonics method. If…

A: Here the values recorded for two samples are for two different individuals ( subjects are not same…

Q: An experiment investigated the effect of length and repetition of TV ads on students choosing to eat…

A: Experiment is the study used to understand the population. It involves some treatments or technique…

Q: Suppose a researcher wants to see whether teaching students to read using a computer game gives…

A: Null Hypothesis: H0: There is no difference between the computer method and the phonics method.…

Q: Jeff Friedman was a section chief for an electric utility company. After the numbers in one of his…

A: To solve this problem, we will make use of venn diagrams. This is a type of graphical…

Q: A school psychologist wants to test the effectiveness of a new method for teaching reading. She…

A: A completely randomized design is one in which the assignment of sample units (subjects) to two or…

Q: Suppose that in a survey of five-year-olds, 49%49% liked the letter A, 56% liked the letter B, and…

A: Given that P(A)=0.49 , P(B)=0.56 , P(C)=0.53

Q: On the basis of this data, what can we conclude about the effect of the drug on short-term memory?…

A: Given Data : Subject     Words Recalled 1                          9 2                          11 3…

Q: The operations manager of a company that manufactures tires wants to determine whether there are any…

A: As per our guidelines we can solve first three sub part of question and rest can be…

Q: Diana tested the effect of number of items on short-term memory in dolphins.  She randomly presented…

A: Ans:

Q: For the three-part question that follows, provide your answer to each question in the given…

A: GivenA)The total number of people in sample =25The number of people with winning tickets in sample…

Q: nts in two elementary school classrooms were given two versions of the same test, but with the order…

A: Given, For Version A: n1=31, x¯1=83, s1=4.6 For  Version B: n2=32, x¯2=78, s2=4.3

Q: A statistics instructor would like to know whether it is worthwhile to require students to do weekly…

A: Given the data;   Grade A Grade B Grade C Grade D Total Section 1 16 22 8 4 50 Section 2 8 18…