### Study on Teen Nicotine AddictionA 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). Among teenagers who had tried tobacco, the mean HONC score was 3.8 (standard deviation = 4.4) for 141 females and 2.4 (standard deviation = 3.5) for 178 males. The tasks below were part of the study analysis:#### Part a: Standard Error- **Find the standard error comparing the sample means. Interpret.** The standard error is \( \text{se} = 0.4540 \). *(Rounded to four decimal places as needed.)*- **What does the standard error indicate?** Choices: - A: The standard error is the standard deviation of the sample for this study. - B: The standard error is the difference in standard deviations for the two populations. - C: The standard error is the standard deviation of the difference between \( \bar{x}_1 - \bar{x}_2 \). - **D (Correct):** The standard error describes the spread of the sampling distribution of \( \bar{x}_1 - \bar{x}_2 \).#### Part b: Test Statistic and P-value- **Find the test statistic and P-value for \( H_0: \mu_1 = \mu_2 \) and \( H_a: \mu_1 \neq \mu_2 \).** - Interpret, and explain what (if any) effect gender has on the mean HONC score. Use a significance level of 0.05. - The test statistic is \( \_\_\_ \). *(Round to two decimal places as needed.)*### NoteThe task involved filling in a blank test statistic value, which requires further calculation not provided in the image.

a. To find the standard error for comparing the sample means (), you can use the following…

Answered: A recent study evaluated how addicted…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of a company's success is customer service. A study was conducted to determine the customer satisfaction levels for one overnight shipping business. In addition to the customer's satisfaction level, the customers were asked how often they used overnight shipping. The results are shown below in the following table: Frequency of Use High 5 per month TOTAL OO Satisfaction level Medium 140 55 25 220 320/700 25/100 295/700 0.4122 Low 10 5 5 20 A customer is chosen at random. Find the probability that the customer uses the company more than five times per month (>5) OR the customer expressed medium satisfaction with the company? TOTAL 400 200 100 700
A Psychology student wanted to study whether there is a difference in stress levels between gender. She devised a survey to measure stress. There were 20 questions with a total score of 100. She randomly selected 30 male and 30 female students to complete the survey. The stress scores of these 60 students can be found below. Male Female 67 70 68 76 67 69 69 75 70 73 68 88 69 68 70 69 70 75 70 79 71 71 71 68 70 71 71 68 72 78 70 76 69 75 69 69 71 69 69 71 70 68 70 76 70 74 72 71 71 69 70 70 71 74 69 80 72 69 71 79 (i) Describe the 90% confidence intervals for the mean stress score of each gender. Based on the confidence intervals, discuss whether we can conclude that the stress level of both genders are similar. You are required to present the relevant Excel reports. (ii) Apply an appropriate hypothesis test at the 10% significant level to determine whether the stress levels of both genders are similar. You are required…
A psychologist is examining the influence of an older sibling in the development of social skills. A sample of three-year old children is obtained. Half the children had no siblings and the others had at least 1 older sibling who is within 5 years of the child's age. The psychologist records a social skills score for each child and obtains the following data. No sibling Older sibling n= 10 n= 17 M= 17 M= 23 2- 50.741 = 48.578 a. Do these data indicate that having an older sibling has a significant effect on the development of social skills? Test at the ,05 level. b. Compute d c. Give an APA formatted summary of your findings.
Please use the table below to complete all parts of question 2 The table below provides information from a study of physically active women who survived breast cancer. The women in the study self-reported their levels of physical activity (i.e., their activities were not observed by the researcher). A.How many hours per day (on the average) did the women in the study report sleeping? B.Did some of the women report that the did not engage in “Very Hard Physical Activity”? Please explain your response. C.Which type of physical activity was engaged in the most? How many hours was it engaged?
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The director of student services at Oxnard College is interested in whether women are more likely to attend orientation than men before they begin their coursework. A random sample of freshmen at Oxnard College were asked what their gender is and whether they attended orientation. The results of the survey are shown below: Data for Gender vs. Orientation Attendance Women Men 360 380 Yes 327 No 318 What can be concluded at the a = 0.01 level of significance?
People tend to evaluate the quality of their lives to others around them. In a demonstration of this phenomenon, Frieswijk, Buunk, Steverink, and Slaets (2004) conducted interviews with frail elderly people. In the interview, each person was compared with fictitious others who were worse off. After the interviews, the elderly people reported more satisfaction with their own lives. Following are hypothetical data similar to those obtained in the research study. The scores are measures of a life-satisfaction scale for a sample of n=9 elderly people who completed the interview. Assume that the average score on this scale is p=20. What is your computed t? Use a one-tailed test with a=0.05. The life satisfaction scores are 18, 23, 24, 22, 19, 27, 23, 26, 25. Note: S2=SS (sum of squares)÷df (degrees of freedom) Answer:
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Are very young infants more likely to imitate actions that are modeled by a person or simulated by an object? This question was the basis of a research study. One action examined was mouth opening. This action was modeled repeatedly by either a person or a doll, and the number of times that the infant imitated the behavior was recorded. Twenty-seven infants participated, with 12 exposed to a human model and 15 exposed to the doll. Summary values are shown below. Person Model Doll Model x 5.11 3.47 s 1.60 1.30 Is there sufficient evidence to conclude that the mean number of imitations is higher for infants who watch a human model than for infants who watch a doll? Test the relevant hypotheses using a 0.01 significance level. (Use ?Person − ?Doll.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four decimal places.)…
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Sulfite is a drug used to treat asthma. In a sample of 400 patients treated at ridge hospital with sulfite, 26% of them said they were quickly relieved. Use this information to answer the following questions: I. What is the variable in the study? ii. What is the population? iii. What is the sample size?

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