I have children sit with a bowl of candy in front of them and ask them not to eat the candy: once with someone sitting in the room watching them and once with the children alo and record whether they took the candy. What bias or effect might I see? placebo effect Rosenthall effect Hawthorne effect response bias nonresponse bias selection bias
Q: A psychologist wants to know whether viewing more violent TV shows affects aggressive behavior. 12…
A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…
Q: Determine whether the study is an experiment or an observational study, and then identify a major…
A: Given A sociologist has created a brief survey to be given to 2000 adults randomly selected from the…
Q: You are interested in whether level of education influences a person's exposure to the media. You…
A: The experiment is aimed to find whether the level of education influences a person's exposure to the…
Q: A random sample of 100 high school students was asked, "Do you prefer to be a leader or a follower…
A: Sample size n=100 The results from the bar graph can be represented as follows: Leadership…
Q: A researcher wanted to study the tendency of our choices to be influenced by our environment, so she…
A: Given : Observed frequency table: Red Yellow Orange Total Strawberries 16 7 9 32 Bananas 10…
Q: The P&G marketing team has created two potential slogans for the new Smile toothpaste. The uplifting…
A: Given Information : The P&G marketing team has created two potential slogans for the new Smile…
Q: A popular uprising that started on January 25, 2011, in Egypt led to the 2011 Egyptian Revolution.…
A: 1. From the given information, The population proportion is 70%=0.70 Among a random sample of 60…
Q: A movie director who combines dark humor and neo-western in his films is curious about gender…
A: There are two independent samples which are males and females. Both samples follows normal…
Q: A food channel wishes to study breakfast preferences vs. geographical location and they send their…
A: Solution: r= 3 Number of rows c= 3 Number of columns
Q: 1. A survey collected the following information from a sample of 450 college students: C1 Year…
A: The provided information is as follows:The data is given in the example.The total number of…
Q: Professor Wonka is interested in whether candy influences children's mood. One group of children is…
A: The formula for effect size is obtained as given below: Effect…
Q: a. identify the populations and the response variable. b. what is the I, n, N c. the degrees of…
A: a. identify the populations and the response variable. b. what is the I, n, N c. the degrees of…
Q: A psychologist wants to know whether viewing more violent TV shows affects aggressive behavior. 12…
A: We have given that data Condition 1 5 14 6 8 7 6 Condition 2 12 14 14 8 15 9 Data is…
Q: The spotlight effect refers to overestimating the extent to which others notice your appearance or…
A: Hi there! Thanks for the question. Since there are multiple questions we have solved the first…
Q: After a product recall, a company solicits feedback from a random sample of 100 customers regarding…
A: The chi-square test statistic is χ2=7.77 and the P-value is between 0.02 and 0.025.
Q: Indicate whether the study described is an observational study or a controlled experiment. A group…
A: Observational Study: We measure or survey members of a sample without attempting to influence them…
Q: Calculate an approximate 99% confidence interval for the difference in mean mood rating…
A: The data measures mood rating before and after being exposed to classic rock music.
Q: Bias that results when participants are allowed to select the study group they want to join. If…
A: The objective is to identify the Bias that results when participants are allowed to select the study…
Q: A researcher wanted to examine if there is a relationship between the personality type (i.e.,…
A: The following 2-way table is given,DOGCATINTROVERT1219EXTROVERT107It is required to test if there is…
Q: A study was performed to examine the personal goals of children in grades 4, 5, and 6. A random…
A:
Q: (i) Use a calculator with sample mean and standard deviation keys to find. and s. (Round your…
A: Since you have posted a question with multiple subparts, we will solve the first three complete…
Q: 1) How many variables are in this data set? 2) Indicate any categorical variable in the data set.…
A: As Prof. A. M. Goon said "A categorical variable is a variable which can take on one of a limited,…
Q: A researcher wants to determine if preschool attendance is associated with high school graduation…
A: Here we have to identify the correct response variable in this study
Q: Consider a recent study that found that watching movies while doing math homework raises a student's…
A: This is a loaded question.
Q: A food channel wishes to study breakfast preferences vs. geographical location and they send their…
A: The number of people from east coast 120.
Q: The Terri Schiavo Case. In the early part of 2005, the Terri Schiavo case received national…
A: (a) The poll was conducted with the help of a telephone survey. As in case of any telephone surveys,…
Q: Olivia attends school at the University of Alberta and decides to compile a contingency table of…
A: There are two categorical variables which are gender and degree. We have to test whether degree and…
Q: Kim Kardashian is interested in studying the phenomenon of selfies more deeply. She randomly…
A: Solution: Population is the entire set of units under study. Sample is the subset of population.…
Q: After a product recall, a company solicits feedback from a random sample of 100 customers regarding…
A: 100 customers : 38 approved 45 disapprove 17 no opinion We have test : chi-square test statistic…
Q: A. Identify the two hypotheses. B. Determine the critical region for your decision. C. Compute the…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Which of the following scenario is an example of a matched-pairs design? Group of answer choices…
A: In matched pair design the same subjects are observed under two different conditions.
Q: ssignment dable eTextbook JUASS James W. Le. E Reading list Chapter 6, Section 3-CI, Exercise 143…
A:
Q: ssume the obtained value of the appropriate statistic is t obt = -2.431, using α = 0.05, 2 tail, and…
A:
Q: To investigate how people communicate over the internet, a researcher had subjects write messages in…
A: To investigate how people communicate over the internet, a researcher had subjects write messages in…
Q: 16 In a survey about people's relationship with their pets, one of the questions asked if the person…
A: Here we have two categorical variable and we want to decide if the feeling of being guilty about…
Q: The table below gives the two-way classification of 400 randomly selected persons based on their…
A: There are two categorical variables which are status and visits to the physician. Status has 2 types…
Q: After a product recall, a company solicits feedback from a random sample of 100 customers regarding…
A: Given that, After a product recall, a company solicits feedback from a random sample of 100…
In this case, the children are specified to have been asked not to eat the candy. This is given that the response of the children towards the eating or not eating of the candy is simply being observed with a physically present observer and when the children are alone.
Step by step
Solved in 3 steps
- Pamela, and educational psychologist, is interested in assessing whether there are differences in how college students with different majors might respond to an ethical dilemma. To this end, she performed a study in which undergraduate marketing and finance majors were asked what they would do if they found a $100 bill in a Walton College of Business classroom. Specifically, would they turn in the $100 bill to the Walton College of Business lost and found? Of the 69 marketing majors who were randomly sampled, 52 said yes and of the 131 finance majors who were randomly sampled, 120 said yes (assume alpha equals .05). z-Test: Two Sample for Means t-Test: Two-Sample Assming Equal Variances Marketing Finance Marketing Finance Меan 0.75362 0.91603 Меan 0.75362 0.91603 Known Variance 0.43 0.28 Variance 0.18841 0.07751 Observations 69 131 Observations 69 131 Hypothesized Mean Difference Pooled Variance 0.1156 -1.7753 Hypothesized Mean DifferenCE z P(Z<-z) one-tail z Critical one-tail P(Z<-z)…A researcher wants to conduct an experiment to determine which environment is best suited for studying - a library, in one's own room, or outside. A total of 30 university students volunteer to participate in the experiment. The researcher believes that gender has an effect on the results. What are the treatments in the experiment?Section 11.2 Question #4 The table below includes results from polygraph (lie detector) experiments conducted by researchers. In each case, it was known if the subjected lied or did not lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing between truth and lies? View the table Did the Subject Actually Lie? No (Did Not Lie) Yes (Lied) Polygraph test indicated that the subject lied. 9 48 Polygraph test indicated that the subject did not lie. 30 12 Determine the test statistic. χ2= _________ (Round to three decimal places as needed.) Determine the P-value of the test statistic. P-value= ___________ (Round to four decimal places as needed.)
- 24) Some research has shown that swearing can help reduce ratings of pain (Stephens, Atkins, & Kingston, 2009). In one such study, each participant was asked to plunge a hand into icy water and keep it there as long as the pain would allow. In one condition, the participants repeated their favorite curse words while their hands were in the water. In the other condition, the participants repeated a neutral word. In addition to lowering the participants’ perception of pain, swearing also increased the amount of time they were able to tolerate the pain. Data similar to the results obtained in their study are shown in the following table. Amount of Time (in Seconds) Participant Swear Words Neutral Words 1 94 59 2 70 61 3 52 47 4 83 60 5 46 35 6 117 92 7 69 53 8 39 30 9 51 56 10 73 61 Do these data indicate a significant difference in pain tolerance between the two conditions?…If gender is the independent variable of a quasi-experiment, this experiment must have a between-subject design. Group of answer choices True FalseA high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6 Mean: 12.7 Mean: 13 Since the simulation shows ( many cases or free cases )? where a mean difference of ( solve for this answer ) or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely ) ?due to the random assignment of participants into groups, so the results of the study are (…
- A psychologist wants to know whether viewing more violent TV shows affects aggressive behavior. 12 children were chosen at random for an experiment and randomly allocated to one of two conditions. In condition 1, six kids were given an aggressive behavior test. The more aggressive the conduct, the higher the score. In condition 2, six children were given the identical test after watching two hours of tv shows. The following results were obtained. Condition 1 5 14 6 8 7 6 Condition 2 12 14 14 8 15 9 Q1, The alternative (H1) hypothesis and null (H0) hypothesis are (2-tail) _________. a. H1: violent TV show does not affects aggressive behavior H0: violent TV show affects aggressive behavior b. H1: violent TV show affects aggressive behavior H0: violent TV show does not affect aggressive behaviorMr Alsup asked the studentS in his third-and sixth-period English classes whether they had chosen a topic for thier writing assignment. he recorded the data in a two-way table, as shown below English class Yes No Total Third period 24 6 30 Sixth period 22 3 25 Total 46 9 55 if jannette in in mr alsup sixth-period english class what is the probablity that she has not chosen a topic for her writing assignment? a- 3% b- 5% c- 12% d-14%Maddie conducts a study to see if listening to music helps students learn math. She surveys a random sample of 250 college sophomores who completed a math class within the past six months. She asks them to indicate how frequently they listened to music while studying math. The students also report their final grade in the math class at the end of the semester. Select the statement below that is false. There is no placebo in this study. Maddie conducted an observational study. A confounding variable could be how often the participants studied math. The population Maddie studied was 250 college sophomores.
- Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation. Do we reject, or fail to reject, the null hypothesis?A study was performed to test eyewitness accuracy. Ten pairs of participants entered a room believing they would be participating in a gambling experiment. Each participant was given $10 in coins to play poker with. The participants were randomly seated near the door or away from the door. After 15 minutes, an actor dressed in street clothes burst into the room and stole the money from the participant near the door. The “thief” was later caught, and both participants (the victim and the witness) were asked to identify him in a line-up. Eyewitness accuracies from the participants were then compared. The ten victims reported a mean accuracy of 31.5 (SD = 21). The witnesses had a mean accuracy of 52.2 (SD = 19.5). Was there a difference? What was the effect size of eyewitness accuracy? Show the nul and alternative hypthoesis, aplhpa level 0.05 and test the null hypothtesis and draw the rejctin line, conclusion and effect sizeA movie director who combines dark humor and neo-western in his films is curious about gender preferences about his movies. His team randomly sampled 12 male and 14 female movie fans and had them score one of his movies after watching it. Here are the scores: Males: 85 59 90 81 90 88 87 87 64 82 87 63Females: 79 79 79 83 76 77 74 85 69 75 82 77 72 63 In order to investigate whether there is enough evidence to conclude that males actually like his movies more, the test statistic is Blank 1. Fill in the blank, read surrounding text.and the p-value is Blank 2. Fill in the blank, read surrounding text.. (Hint:Assume the populations are Normal and variances are equal, Use the mean of males as Mu1)