The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y) for each of the fifteen adults in a study. The least-squares regression line for these data has equation y=8.38-0.25x. This line, along with a scatter plot of the sample data, is shown below. GAS score, x 2.0 8.0 6.5 1.6 5.8 3.9 8.9 2.9 9.2 7.0 3.9 3.5 8.1 5.0 1.2 Send data to calculator Sleep time, y (in hours) 8.1 5.5 6.2 8.8 7.8 8.7 5.7 7.1 6.5 6.7 6.8 7.8 7.1 6.3 7.1 Sleep time (in hours) 10+ 9+ 5. 0 x Based on the study's data and the regression line, complete the following. x GAS score (a) For these data, sleep times that are less than the mean of the sleep times tend to be paired with GAS scores that are (Choose one) the mean of the GAS scores. (b) According to the regression equation, for an increase of one in GAS score, there is a corresponding decrease of how many hours in sleep time? X

Taylor Swift is interested in learning what proportion of her fans want her to re-record her masters, so she takes a simple random sample of 500 fans and asks them.  Of the 500 fans, 487 of them (97.4%) respond that they want her to re-record all of her masters.  What is the parameter and what is its value?   a. The parameter is the average number of all Taylor Swift fans who want her to re-record her masters, which is unknown.   b. The parameter is the proportion of the sampled Taylor Swift fans who want her to re-record her masters, which is unknown.   c. The parameter is the group of the sampled Taylor Swift fans who want her to re-record her masters, which is 487.   d. The parameter is the proportion of the sampled Taylor Swift fans who want her to re-record her masters, which is 0.974.   e. The parameter is the proportion of all Taylor Swift fans who want her to re-record her masters, which is unknown.   f. The parameter is the proportion of all…

The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from  0  to  10 , measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.)   We're interested in making predictions about individuals' sleep behavior based on their GAS scores. The bivariate data below give the GAS score (denoted by  x ) and the number of hours of sleep last night (denoted by  y ) for each of the fifteen adults participating in a study. A scatter plot of the data is shown in Figure 1.   GAS score, x Sleep time, y(in hours) 1.7 8.6 6.6 6.0 3.8 8.6 5.9 8.0 0.9 7.3 9.1 5.6 5.0 6.1 6.9 6.2 8.9 6.4 3.9 6.7 2.9 7.0 2.0 8.3 8.1 5.3 7.9 7.2 3.5 7.5        y 5 6 7 8 9 10 x 2 4 6 8 10 0…

The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from o to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) 圖 Aa We're interested in making predictions about individuals' sleep behavior based on their GAS scores. The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y ) for each of the fifteen adults in a study. The least-squares regression line for these data has equation =8.36 – 0.25.x. This line, along with a scatter plot of the sample data, is shown in Figure 1.

A researcher was interested in finding out whether students’ sense of belonging in a course differed between students attending classes on campus and students attending classes on Zoom. They recruited five students attending classes on campus and five students attending classes on Zoom to test this. Students were asked to complete a survey measuring how much they felt like they belonged in the course. The scale ranged from 0 (not at all) to 10 (very much). Students’ data, which were non-normal, are provided below. Campus Zoom 3 7 2 5 7 4 1 8 6 9   What is your obtained statistic?A) 19.5B) 35.5C) 3D) 10   What is your critical statistic?A) 17B) 19C) 0D) 1 What is your conclusion?A) Students taking the course on campus reported a significantly lower sense of belonging compared to students taking the course on Zoom.B) Students taking the course on campus reported a significantly higher sense of belonging compared to students taking the course on Zoom.C) Sense of belonging…

. Do patients with gastrointestinal issues experience more psychological distress than the general population?   The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general population, the mean for anxiety is µ = 4.2. Anxiety levels are calculated based on self-reported answers to questions on a scale from 0 through 42, with lower scores indicating lower anxiety.   Participants with gastrointestinal issues (specifically inflammatory bowel disease, IBD) completed the DASS-21. Use the data presented below to determine whether having gastrointestinal issues like IBD significantly increases risk for anxiety. Test whether or not the performance of this sample is significantly higher than the normal population using the proper t-test.  Here are the data:   Anxiety scores: 12, 15, 10, 8, 10, 5, 10, 13, 4, 6   ANALYSES AND UNGRADED OPTIONAL GUIDING QUESTIONS: 1a. Identify the Indep.Variable:__                  Dep.Variable:__ Is it the Hypothesis…

For a special pre–New Year’s Eve show, a radio station personality has invited a small panel of prominent local citizens to help demonstrate to listeners the adverse effect of alcohol on reaction time. The reaction times (in seconds) before and after consuming four drinks are in data below. At the 0.005 level, has the program host made his point? Identify and interpret the p-value for the test.   Data:   Subject Before After 1 0.32 0.39 2 0.39 0.44 3 0.36 0.49 4 0.41 0.53 5 0.37 0.46 6 0.42 0.52 7 0.41 0.52 8 0.43 0.46 9 0.39 0.55 10 0.41 0.52 11 0.35 0.45 12 0.42 0.41 13 0.32 0.54 14 0.39 0.46 15 0.41 0.53 16 0.33 0.54 17 0.43 0.46 18 0.42 0.43 19 0.41 0.52 20 0.35 0.52 21 0.39 0.41 22 0.39 0.44 23 0.32 0.50 24 0.33 0.53 25 0.31 0.45 26 0.35 0.45 27 0.31 0.45 28 0.32 0.48 29 0.38 0.54 30 0.37 0.46 31 0.39 0.49 32 0.30 0.51 33 0.40 0.49 34 0.41 0.50 35 0.41 0.53 36 0.35 0.47 37 0.37 0.51 38 0.41 0.46

The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) We're interested in making predictions about individuals' sleep behavior based on their GAS scores. The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y) for each of the fifteen adults participating in a study. A scatter plot of the data is shown in Figure 1. Also given is the product of the GAS score and the sleep time for each of the fifteen adults. (These products, written in the column labelled "xy", may aid in calculations.) GAS score, x 00 2.1 3.6 8.0 3.8 7.0 9.1 5.0 5.9 9.1 1.5 6.5 4.0 3.0 8.0 Sleep time, y (in hours) 8.2 7.4 1.0 Send data to calculator 7.4 8.4…

A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response variable was the number of yes answers on a questionnaire called the Hooked on Nicotine Checklist (HONC). Of teenagers who had tried tobacco, the mean HONC score was 3.8 (s = 4.8) for the 143 females and 2.3 (s = 2.8) for the 171 males. Complete parts a through c below. ... (Round to four decimal places as needed.) What does the standard error indicate? A. The standard error describes the spread of the sampling distribution of x₁ - x2- OB. The standard error is the standard deviation of the sample for this study. OC. The standard error is the difference in standard deviations for the two populations. OD. The standard error is the standard deviation of the difference between x₁ - x₂- b. Find the test statistic and P-value for Ho: H₁ H₂ and Ha: H₁ H₂. Interpret, and explain what (if any) effect gender has on the mean HONC score. Use the significance level 0.05. The test statistic is…

They then decided to determine whether the effect of the phone depended on how dependent people were on their phones. They had participants complete a scale to measure phone dependence (e.g., I would have trouble getting through a normal day without my phone) and classified them as high or low in dependence. They then analysed working memory task performance in a 2 (location: outside, desk) x 2(dependence: high, low) ANOVA. In this design, "dependence" is a(n) O a. Independent variable O b. Extraneous variable O c. Dependent variable O d. Subject variable