Question

resourcercontent/2/Math%202003%20Assessment%201.pdf Name: Complete the following problems. Show all necessary work. Empirical and Quantitative Reasoning 1. Given the following data: Taskstream Assessment 1 Math 2003 70 36 38 56 46 56 46 73 32 69 48 28 44 53 48 35 51 60 70 53 58 56 515 33 62 51 44 54 66 45 Summarize the data numerically by finding (a) the measures of central tendency (b) the measures of variance Critical Thinking 2. An instructor, of a class with 30 studesats, wants to choose a committee of 5 in order to plan for the course. In how many ways can he choose the committee, if or important? Communication 3. Describe what is messnt by an experiment that is a completely randomized desig
Does anyone know how to do these? I am totally lost. If possible can work be shown?

Answer 1

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(3) A completely randomized design is probably the simplest experimental design, in terms of data analysis and convenience. With this design, subjects are randomly assigned to treatments.

A completely randomized design relies on randomization to control for the effects of extraneous variables. The experimenter assumes that, on averge, extraneous factors will affect treatment conditions equally; so any significant differences between conditions can fairly be attributed to the independent variable.

A completely randomized design layout for a hypothetical medical experiment is shown in the table below. In this design, the experimenter randomly assigned subjects to one of two treatment conditions. They received a placebo or they received a cold vaccine. The same number of subjects (500) are assigned to each treatment condition (although this is not required). The dependent variable is the number of colds reported in each treatment condition. If the vaccine is effective, subjects in the "vaccine" condition should report significantly fewer colds than subjects in the "placebo" condition.

Treatment

Placebo Vaccine

500 500