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Clinicians at a nursing home facility want to see if giving residents plants to tend to will help lower depression. To test this idea, each resident is randomly assigned to one of three groups: Group 1, Control group (no plant); Group 2, Bamboo; or Group 3, Cactus. Each plant comes with a card detailing care instructions. After 90 days, all participants will complete the Acme […]

During flu season, the administrators at a walk-in health clinic want to determine if providing patients with a pamphlet or a video will increase their receptivity to flu shots. Each patient will be given a ticket at the check-in desk with a 1, 2, or 3 on it; the tickets will be issued in (repeating) sequence. Once escorted to the exam room, patients with number […]

You want to determine if watching a video of a comedy with a laugh track enhances enjoyment. Subjects will be recruited and randomly assigned to one of three groups: Those in Group 1 (the control group) will watch the video without the laugh track, those assigned to Group 2 will watch the same video with the sound of a 50-person audience included in the soundtrack, […]

It is thought that exercising early in the morning will provide better energy throughout the day. To test this idea, subjects are recruited and randomly assigned to one of three groups: Members of Group 1 will constitute the control group and not be assigned any walking. Members of Group 2 will walk from 7:00 to 7:30 a.m., Monday through Friday, over the course of 30 […]

You want to find out if music enhances problem solving. Subjects will be recruited and randomly assigned to one of four groups: Those in Group 1 will serve as the control group and will be given a standard 100-piece jigsaw puzzle to solve in a quiet room. Participants in Group 2 will be given the same puzzle to assemble, but instead of silence, there will […]

A survey was conducted in Professor Lamm’s class and Professor Milner’s class. The question that students responded to is, “How many siblings do you have?” Data set: Ch 04 – Exercise.sav Codebook Variable: class Definition: Class designation Type: Categorical (1 = Prof. Lamm, 2 = Prof. Milner) Variable: siblings Definition: Number of siblings Type: Continuous 1. Run descriptive statistics and a histogram with a normal […]

Note: Use R for computations in the following questions and submit your R. Mathematicalnotations or proofs can be written in a word or pdf document. Problem 1 The time between calls to a plumbing supply business is exponentially distributed with amean time between calls of 15 minutes. (a) What is the probability that there are no calls within a 30-minute interval? (b) What is the […]

An English teacher recognizes that students already know how to spell some of the words assigned for the weekly spelling test. This teacher wants to discover how many new words students learn. The usual assignment is 25 words per week. At the beginning of the month, the teacher administers a spelling test consisting of all 100 words that will be assigned over the month. The […]

The staff at a mental health clinic wants to determine if their current form of short-term therapy substantially reduces depression. Prior to treatment, each patient will be asked to complete the Acme Depression Inventory (ADI), which renders a score from 0 to 75 (0 = low depression, 75 = high depression). Patients will also be asked to complete the same instrument at the conclusion of […]

The staff of the Physical Education Department wants to know if providing a single 15-minute individual coaching session with an expert bowler will enhance students’ bowling scores. Each participant will bowl one game, during which time the coach will unobtrusively observe his or her bowling style. Then, the coach will provide the 15-minute coaching session. Finally, the student will bowl a second game. The scores […]