A researcher is interested in learning whether young people whose fathers are absent from home are more likely to engage in delinquent behaviours. She compares the arrest rates of boys whose fathers are absent with those of boys whose fathers are present at home across socio economic status (e.g., lower SES, middle SES, upper SES). What type of data is the researcher collecting? Select one: A. archived data B. self-report data C. case study data D. experimental data E. naturalistic observation

A manager is considering placing an ad campaign on an emerging social media platform (e.g., Snap). To understand the demographics of usage for this platform, the manager takes a random sample of potential users and asks them if they participate in this social media platform. The results are shown below: Part of Social Media Platform Not part of social media platform Age < 30 75 33 Age >= 30 28 28 Is there a statistically significant difference in the proportions of participants in the platform for the two age groups “Age < 30” and “Age >= 30”? Use a 5% level of significance. (Hint: Please read the column headers carefully before launching into your test). Group of answer choices z = 2.44 > z-crit = 1.96, so there is a significant difference. z = 1.96 < z-crit = 2.35, so there is NO significant difference. z = 2.49 < z-crit = 2.58, so there is NO significant difference. z = 2.44 > z-crit = 1.65, so there is a significant difference.

Reuben is a human resources executive for a technology company. He is deciding between two types of plans for vacation allowance for the employees of the company: Unlimited and Traditional. Reuben wants to determine, for workers in the tech industry, if the yearly mean number of vacation days taken by workers with an Unlimited plan is greater than the yearly mean number of vacation days taken by workers with a Traditional plan.Reuben surveys a random sample of 17 workers who have the Unlimited plan and a random sample of 15 workers who have the Traditional plan. (These samples are chosen independently.) For each worker, he records the number of vacation days taken last year. For the workers with an Unlimited plan, the sample mean is 18.9 with a sample variance of 30.8. For the workers with a Traditional plan, the sample mean is 17.4 with a sample variance of 6.1.Assume that the two populations of vacation days taken are approximately normally distributed. Can Reuben conclude, at the…

The Nielson Home Technology Report provided information about home technology and cell phone usage. The following data are the hours of daily cell phone usage for a random sample of college students. Hours of Relative Usage Frequency Frequency 0.0-> 2.9 5 3.0- 5.9 28 6.0- 8.9 8 9.0-> 11.9 6 12.0- 14.9 3 Find the relative frequency of college students who use their cell phone between 12.0 and 14.9 hours. a.0.30 b.0.12 Oc. 0.06 d.0.03