It is possible for a study using non-experimental design to have strong protection against internal validity threats, or convincingarguments that internal validity threats did not interfere withthe study findings. True or false
Q: A clinical psychologist wanted to examine the relative effectiveness of cognitive-behavioral therapy…
A: Note: Hi! Thank you for the question. As you have posted a question with multiple sub-parts,…
Q: In a study on attitudes toward the blacks, participants are asked questions such as, “Do you believe…
A: In a study on attitudes toward the blacks, participants are asked questions such as, “Do you believe…
Q: A researcher notes that there seems to be a difference in the prevalence of high blood pressure…
A:
Q: On a student survey, 49 out of 70 participants agreed that obeying traffic laws was important or…
A: Given that Sample size, n= 70 And x= 49 We know that, p=x/n = 49/70 p= 0.70 so q= 1-p q= 0.30
Q: What distinguishes a quasi-experiment from a true experiment? When might a quasi-experiment be more…
A: The difference is that the criterion for assignment is selected by the researcher in a…
Q: A researcher notes that there seems to be a difference in the prevalence of individuals who are…
A: Here, we want to find difference between two variable. We want to test independence between two…
Q: A researcher notes that there seems to be a difference in the prevalence of high cholesterol among…
A: Given, A researcher notes that there seems to be a difference in the prevalence of high cholesterol…
Q: A researcher notes that there seems to be a difference in the prevalence of individuals who are…
A: Given information: χ2=6.437χCritical2=3.84
Q: A researcher notes that there seems to be a difference in the prevalence of high blood pressure…
A: Rejection Rule If Chi-square value > critical value, then we reject Null Hypothesis If Chi-square…
Q: For the following question- It is thought that having a relatively consistent length of message in…
A: Here the subject would be the message length in any given conversation We have to measure the…
Q: Is it possible to determine causation from a quasi-experiment? How and why does the interpretation…
A: Introduction: Causation: The cause-and-effect occurs between two groups if the one group makes the…
Q: Is biased the best controlled at an analysis stage of a study true or false
A: No , it is not true
Q: lease use a .05 significance level for all the problems. Show all your work. When you perform a…
A: The t test are used to calculated the mean significance between the two independent samples and…
Q: Suppose that you want to conduct a left-tailed hypothesis test at the 5% significance level. How…
A: The level of significance is 5%. The test is a left-tailed test.
Q: One of your colleagues is interested in running individual t-tests to compare dogs and cats for each…
A: It is required to choose the correct option.
Q: Random assignment helps to strengthen causal inferences within an experiment by ruling out potential…
A: A confounding variable influences both the independent as well as the dependent variable.
Q: study-dataset/data). This long-term study collected data on 16 risk factors and ten- year risk of…
A:
Q: A researcher notes that there seems to be a difference in the prevalence of diabetics who smoke and…
A: Given dataA researcher notes that there seems to be a difference in the prevalence of diabetics who…
Q: Listed below are results from subjects tested for visual acuity in the right eye and left eye (…
A: The data set shows no significant difference in visual acuity between left and right eyes, with a…
Q: The average IQ for Americans is 100. Does the IQ score from the dataset significantly differ from…
A: a) Let μ denote the population mean IQ for Americans. The claim of the test is the IQ score from the…
Q: Explain the difference between a no-treatment control group and a placebo control group. Why are…
A: A treatment is a stimulus that is assigned to the subjects of the experiment in order to record…
Q: The (fictitious) Midwest Journal of Medicine recently published a study of the recovery curve after…
A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…
Q: A professor claimed that a majority (more than 50%) of her students believe in ghosts. To test her…
A: What is the alternative hypothesis for this test? From the given information, Consider, x be random…
Q: A researcher studying psychological well-being between those with depression, anxiety, or mood…
A: Dependent t-test: The dependent t-test, also known as the “paired t-test”, is a statistical…
Q: If the null hypothesis is rejected for a One-Way ANOVA, then what test should you conduct?
A: If the null hypothesis is rejected for a One-Way ANOVA, then it means that the means of all groups…
Q: one treatment condition of a between-subjects
A: Given that,
Q: A recent study focused on the method of payment used by college students for their cell phone bills.…
A: The claim is that majority of college students' cell phone bills are paid by their parents.
Q: A study examined the effects of fatigue on driving performance. Based on the results, the…
A: Given that, a study examined the effects of fatigue on driving performance. Based on the results,…
Q: 1. When should a one-tailed test be used? A two-tailed test?
A: Here, We have to give brief idea about one-tailed test and two tailed test When we conduct a test (…
Q: The personality characteristics of business leaders (e.g., CEOs) are related to the operations of…
A: Type of test : Two tailed Test
Q: In a two-way ANOVA, why is the test for interaction done first?
A: Purpose of conducting interaction test first: If there is no interaction effect present in the…
Q: na Leichtman Research Group survey of 850 TV households, 74.6% of them had at least one…
A: Given that sample size =850 Total 850 sample surveyed out of which 74.6% had at least one internet…
Q: used their cell phone and 72 of 120 males did so. At the 0.01 level of significance, is there enough…
A: It has been found that many first-time interviewees commit errors that could very well affect the…
Q: A counseling psychologist hypothesizes that more perceived femininity predicts less perceptions of a…
A: a. State the null and alternative Hypotheses: Null Hypothesis: H0: β=0. That is, more…
Q: 2. In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one…
A: We have given that p0=39/(39+32)=0.5492
Q: Online dating sites and mobile dating apps have become more popular over the years for American…
A:
Q: Suppose you manage a portfolio and you want to conduct a hypothesis test of the claim that your mean…
A: From the given scenario we state the hypotheses as, Hypotheses: H0(Null): The mean portfolio return…
Q: Which of the three independent variables are significantly related to sales performance (at a =…
A: The tests are conducted at 5% level of significance that is alpha=a= 0.05 A independent variable is…
Q: The Rip-off Vending Machine Company operates coffee vending machines in office buildings. The No. of…
A: We have given that Sample size n = 9 Level of significance =?=0.05
Q: When you get a surprisingly low price on a product do you assume that you got a really good deal or…
A: a. Let μd is defined as the population mean difference between purchased by a friend or purchased…
Q: 2.In an experiment using systematic/controlled measures of behavior, how are you able to increase…
A: There is a generalised things of internal validity and external validity that can apply to the…
Q: What is a “quasi – experimental design” and how does it differ from an ex post facto design?
A: A quasi-experimental design aims to establish a cause-and-effect relationship between an independent…
Q: It is found that playing a specialized type of video game helps with hand-eye coordination. However,…
A: Type I error: Rejecting H0 when H0 is true. Also known as false positive. Type II error: Fail to…
Q: It has been argued that first-born children will in general be more independent than later-born…
A: To apply the signed-rank test to test the argument, the hypothesis of interest is H0: The median…
Q: A clinical researcher has developed a new test for measuring impulsiveness and would like to…
A:
It is possible for a study using non-experimental design to have
strong protection against internal validity threats, or convincing
arguments that internal validity threats did not interfere with
the study findings.
True or false
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
- An HR expert at an insurance company is considering the introduction of personality tests in the process of recruiting sales agents. It is hypothesised that certain personality traits may contribute to being a successful sales agent, and therefore personality profiles can be used to select the best applicants for open positions. The introduction of personality measures in the recruitment process, however, is only meaningful if there is evidence that certain personality characteristics are related to job performance. To test whether success in this occupation is related to personality features, the expert conducts a study, in which a random sample of currently employed sales agents fill in a questionnaire measuring three traits: (1) extraversion, (2) conscientiousness and (3) agreeableness. Each trait is measured on a scale ranging between 0 and 10 points. To test whether the annual total value of insurance policies sold by an agent can be predicted from personality scores, a multiple…An HR expert at an insurance company is considering the introduction of personality tests in the process of recruiting sales agents. It is hypothesised that certain personality traits may contribute to being a successful sales agent, and therefore personality profiles can be used to select the best applicants for open positions. The introduction of personality measures in the recruitment process, however, is only meaningful if there is evidence that certain personality characteristics are related to job performance. To test whether success in this occupation is related to personality features, the expert conducts a study, in which a random sample of currently employed sales agents fill in a questionnaire measuring three traits: (1) extraversion, (2) conscientiousness and (3) agreeableness. Each trait is measured on a scale ranging between 0 and 10 points. To test whether the annual total value of insurance policies sold by an agent can be predicted from personality scores, a multiple…A researcher wanted to examine whether type of dog food (freeze dried meat vs generic brand kibble) would affect dogs’ attention span. The researcher hypothesized that dogs who ate freeze dried meat would have longer attention spans than those who ate generic brand kibble. The researcher used a single sample of 13 subjects, that took part in both treatment conditions. Should the researcher use a one-tailed or two-tailed test? one-tailed two-tailed
- If the power of an experiment is low then The experiment will likely be inconclusive. Any significant findings obtained are suspect. The results are skewed.An HR expert at an insurance company is considering the introduction of personality tests in the process of recruiting sales agents. It is hypothesised that certain personality traits may contribute to being a successful sales agent, and therefore personality profiles can be used to select the best applicants for open positions. The introduction of personality measures in the recruitment process, however, is only meaningful if there is evidence that certain personality characteristics are related to job performance. To test whether success in this occupation is related to personality features, the expert conducts a study, in which a random sample of currently employed sales agents fill in a questionnaire measuring three traits: (1) extraversion, (2) conscientiousness and (3) agreeableness. Each trait is measured on a scale ranging between 0 and 10 points. To test whether the annual total value of insurance policies sold by an agent can be predicted from personality scores, a multiple…A clinical psychologist wants to explore a between-subjects experiment comparing treatments for PTSD emotionally focused therapy (EFT), client centered therapy (CCT), cognitive processing therapy (CPT), and cognitive behavioral therapy (CBT) against a control condition. Subjects were randomly assigned to the experimental condition. After 8 weeks, the subject's scores were measured using Treatment Outcome Post-traumatic Stress Disorder Scale (TOP-8). Identify which statistical analysis is appropriate for this data. Identify the IV and DV and their respective levels if applicable. Is this a repeated measures design?
- 4. Chantix (varenicline) tablets are used as an aid to help people stop smoking. In a clinical trial, 129 subjects were treated with Chantix twice a day for 12 weeks, and 16 subjects experienced abdominal pain (based on data from Pfizer, Inc.)If someone claims that more than 8% of Chantix users experience abdominal pain, that claim is supported with a hypothesis test conducted with a 0.05 significance level. Using 0.18 as an alternative value of P, the power of the test is 0.96. Interpret this value of the power of the test.A researcher notes that there seems to be a difference in the prevalence of high blood pressure among college-educated individuals who consume low amounts of processed foods and the prevalence of individuals who only have a high school education and consume high amounts of processed foods. Use the appropriate hypothesis to test for the independence of the two independent variables presented here at the 5% significance level to ensure confounding has not influenced the study’s results. Then, interpret your response. Diet Low in Processed Foods Normal BP High BP Total College Education 124 55 179 High School Education 69 152 221 Total 193 207 400 Diet High in Processed Foods Normal BP High BP Total College Education 64 85 149 High School Education 98 153 251 Total 162 238 400 The chi square value of 37.724 is higher than the chi square value of 3.84; therefore, we can accept H0 at…Consider a within-subjects experimental design with two conditions. The experimenter ran both a correlated t test (which is the correct analysis) and (incorrectly) an independent-groups t test. The experimenter found the correlated t test was significant whereas the independent-groups t test was not. The experimenter concluded that this was because the mean difference score across subjects was greater than the difference between the means of the conditions. Is this the correct conclusion? yes no
- The personality characteristics of business leaders (e.g., CEOS) are related to the operations of the businesses that they lead (Oreg & Berson, 2018). Traits like openness to experience are related to positive financial outcomes and other traits are related to negative financial outcomes for their businesses. Suppose that a board of directors is interested in evaluating the personality of their leadership. Among a sample of n = 16 managers, the sample mean of the openness to experiences dimension of personality was M = 4.50. Assuming that u = 4.24 and o = 1.05 (Cobb-Clark & Schurer, 2012), use a two-tailed hypothesis test with a = .05 to test the hypothesis that this company's business leaders' openness to experience is different from the population. Standard Normal Distribution Mean - 0.0 Standard Deviation 1.0 .7198 .1401 .1401 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 -1.08 1.08 Step 1. Ho: ; H;: a = .05. Step 2. The critical region consists of Step 3. For these data the standard error is and…A clinical psychologist wants to explore a between-subjects experiment comparing treatments for PTSD emotionally focused therapy (EFT), client centered therapy (CCT), cognitive processing therapy (CPT), and cognitive behavioral therapy (CBT) against a control condition. Subjects were randomly assigned to the experimental condition. After 8 weeks, the subject's scores were measured using Treatment Outcome Post-traumatic Stress Disorder Scale (TOP-8). Identify which statistical analysis is appropriate for this data. Identify the IV and DV and their respective levels if applicable. Is this a repeated measures design?
