10. Mathevon et al, 2010 measured acoustic properties of spotted hyena communication, termed the giggle call, to investigate whether properties of the call encoded information about the signaler. Using the data hyenagiggles.csv, choose an appropriate way to plot the data. Test for significant differences between variation in dominant and subordinate hyena giggles. ( 11. Epel et al, 2004 studied the relationship between telomeres and stress (telomeres_stress.csv posted on Blackboard) in humans. Telomere length may be linked to cell senescence and longevity. Stress varied by the number of years a person was taking care of a chronically ill child (column labelled "years"). Does years caregiving have a relationship to telomere length? Plot the data and test for a relationship. "

You would like to test whether you can predict the amount of rain that falls on a given day from the amount of dancing a person does the day before. You randomly sample 50 people and record both dancing and raining, taking the average for each person over a 100 day period (one value for both dancing and rain per person). Each person was located in a different city more than 100 km distant from the closest other participant, to eliminate spatial autocorrelation. Neither your rain data nor your dancing data are normally distributed. What is the best solution? a) Transform both variables using the best transformation for each b) Transform both variables using the same transformation c) Focus on transforming your dancing data, searching for a transformation that improves normality d) Focus on transforming your rain data, searching for a transformation that improves normality

A group of boys believe that there is a relationship between the act of sending flowers to a girl and texts received as a result. A study was carried out in which a sample of girls were asked whether they received any flowers and how many texts they sent in response. a)What type of variable is the explanatory variable? Quantitative Categorical   b) What type of variable is “number of texts sent in response?” Categorical Quantitative   c)What type of visual display should be used to summarize this data?   Bar chart Side-by-side boxplots Histogram Dot plot

(33) Christian Daniel - Ahora X Quiz: Chapter 09: Chapter Quiz X A kccd.instructure.com/courses/43... 图☆ FX Question 9 1 pts On a standardized spatial skills task, normative data reveal that people typically get u = 15 correct solutions. A psychologist test n = 7 individuals who have brain injuries in the right cerebral hemisphere. For the following data, determine whether or not right- hemisphere damage results in significantly reduced performance on the spatial skills task. Test with alpha = .05 and a one-tailed %3D distribution. The data are as follows: 12, 16, 9, 8, 10, 17, 10 What is the t value for this study? tsample = 4.882 O tsample = 2.87 Isample = - 2.49 O tsample = 0.424 Question 10 1 pts

he paper "From Dr. Kildare to Grey's Anatomy"† describes several studies of how the way in which doctors are portrayed on television might influence public perception of doctors. One study was described as follows. Rebecca Chory, Ph.D., now an associate professor of communication at West Virginia University, began studying the effect of such portrayals on patients' attitudes toward physicians. Using a survey of 300 undergraduate students, she compared perceptions of physicians in 1992—the end of the era when physicians were shown as all-knowing, wise father figures—with those in 1999, when shows such as ER and Chicago Hope (1994–2000) were continuing the transformation to showing the private side and lives of physicians, including vivid demonstrations of their weaknesses and insecurities. Dr. Chory found that, regardless of the respondents' personal experience with physicians, those who watched certain kinds of television had declining perceptions of physicians' composure and regard…

Head movement evaluations are important because disabled individuals may be able to operate com-munications aids using head motion. A paper reported the accompanying data on neck rotation (indegrees) both in the clockwise direction (CL) and the counterclockwise direction (CO) for 13 subjects.You may assume that the 13 subjects are representative of the population of adult Americans. Basedon these data, is it reasonable to conclude that mean neck rotation is greater than in the clockwisedirection than in the counterclockwise direction? Test the relevant hypotheses using a significancelevel of 0.1.Subject 1 2 3 4 5 6 7 8 9 10 11 12 13CL 57.9 35.7 54.5 56.8 51.1 70.8 77.3 51.6 54.7 63.6 59.2 59.2 55.8CO 44.2 52.1 60.2 52.7 47.2 65.6 71.4 48.8 53.1 66.3 59.8 47.5 64.5Difference

Cell Phones and Handedness A study was conducted to investigate the association between cell phone use and hemispheric brain dominance. Among 216 subjects who prefer to use their left ear for cell phones, 166 were right-handed. Among 452 subjects who prefer to use their right ear for cell phones, 436 were right-handed (based on data from “Hemispheric Dominance and Cell Phone Use,” by Seidman et al., JAMA Otolaryngology—Head & Neck Surgery, Vol. 139, No. 5). We want to use a 0.01 significance level to test the claim that the rate of right-handedness for those who prefer to use their left ear for cell phones is less than the rate of right-handedness for those who prefer to use their right ear for cell phones. (Try not to get too confused here.) a. Test the claim using a hypothesis test. b. Test the claim by constructing an appropriate confidence interval.

A sleep researcher wants to determine whether a new pillow might reduce snoring amongst patients with this type of sleep apnea. Participants are randomly assigned to use the new pillow or a control condition (regular pillow). Their sleep behavior is recorded on audiotape with time snoring. The findings indicate significantly less snoring takes place with the new pillow. Identify the independent variable (and categories) and the dependent variable. Explain a Type I error in terms of this study. Explain a Type II error in terms of this study.

A study examined the relationship between a nurse's assessment of a patient's facial expression and his or her self-reported level of pain. Data for 89 patients are summarized below: Self-Report Facial Expression No Pain Pain No Pain 17 40 Pain 3 29 We'd like to determine if there is evidence of an association between a facial expression that reflects pain and self-report pain, because dementia patients do not always give a verbal indication that they are in pain. By using SPSS or Minitab, design the appropriate test and generate the data analyses. Relate the results of the test to the research question and conclude the findings.

Recent research indicates that the effectiveness of anti-depressant medication is directly related to the severity of the depression (Khan, Brodhead. Kolts, and Brown, 2005). Based on pre-treatment dcprcssion scores, paticnts werc divlded into four groups based on their level of depi ession. After receiving the antidepression medication, depi ession scores were measured again and the amount of improvement was recorded for cach pcrsion. The following data are similar to the results of the study. Moderately High Moderate Moderate Low Severe Severe 4 5 N= 16 2 3 6 6 G= 48 +a 2 2. 2 6 ΣΧ- 2 4 M=2.5 M=2 M=4 M-5 T= 10 T= 8 T= 16 T=20 SS=. .. SS=2 SS=8 SS- 6 A, Complete the places marking by ... and answer the question whether the data indicate significant difference among the four levels of severity? Test with a= 0.05. B, Compute n', the percentage of variance expressed by group difference.