Due 2/14/18 LastName FirstName Fill in the Blanks Section A raw frequency distri

Question

Due 2/14/18 LastName FirstName Fill in the Blanks Section A raw frequency distribution lists the category of data, while a relative frequency distribution lists the occurrences of each category of data (4 points) In a relative frequency distribution, what should the relative frequencies add to? 1. of occurrences of each 2. (2 points) 3 The categories by which data are grouped are called (2 pts). 4. The class limit is the smalilest value within the class and the class limit is the largest value within the class. The difference between consecutive lower class limits. (4 points). is the Pharmaceuticals, Inc., announced the results of its first human trial of NPI 32101, a topical form of its skin ointment. A total of 225 patients diagnosed with skin irritations were randomly divided into three groups to test the effectiveness of the new topical cream. The first group received a 5mg dose of cream, the second group received a 10mg dose of cream, and the third group received a placebo. Groups were treated twice daily for a 6-week period. Source: www.nucryst.com (8 points). 5. (a) What type of study design is this? (b) What is the Response variable in this study? (c) What are the treatments? (d) What group is the control group? Poverty Every year the US Census Bureau counts the number of people living in poverty. For example, in 2009 the poverty threshold for a family of four with two children was $21,756. The bar graph below represents the number of people living in poverty in the United States in 2009, by ethnicity. Source:U.S. Census Bureau 6. How many whites were living in poverty in 2009? (5 points). Number in Poverty 29,830 Of the impoverished, what percent were Hispanic? (3 points). 944 12.30 1746 While Black HnpanicAsian Ethnicity

Explanation / Answer

Solution

(1) Number and Proportion

(2) The relative freuqencies add to 1.

As the relative frequencies expressed as fractions add up to 100% i.e.

(3) Categorical Frequency Distribution

(4) Lower class limit and class width

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