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# MATH 246-Exam 1 Study Guide MATH 246

UWEC
GPA 3.0
Elem Statistics
Vicki M. Whitledge

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Covers chapters 1-4.
COURSE
Elem Statistics
PROF.
Vicki M. Whitledge
TYPE
Study Guide
PAGES
3
WORDS
KARMA
50 ?

## Popular in Mathematics (M)

This 3 page Study Guide was uploaded by Madeline on Thursday September 24, 2015. The Study Guide belongs to MATH 246 at University of Wisconsin - Eau Claire taught by Vicki M. Whitledge in Summer 2015. Since its upload, it has received 143 views. For similar materials see Elem Statistics in Mathematics (M) at University of Wisconsin - Eau Claire.

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Date Created: 09/24/15
MATH 246 EXAM 1 STUDY GUIDE PROPERTY OF MADDY EARLEY Coverage Chapters 14 Chapter 1 Data Collection Match the words with their matching de nitions in each section 1 statistics a a numerical summary of a sample 2 descriptive statistics 3 inferential statistics b the group that you want to study 439 Populat39 n c a member of the population may be a person but 5 IndIVIdual may 7539 samplet also be an animal or object 839 DEFET9 er d the small part of the population that you actually 39 s a 395 39C collect data on e Generalizing results drawing conclusions and determining 1 qualitative a in nite number of values that cannot be counted there is always a value of the variable between any 2 quantitative other two valueS b countable number of values 339 d39screte quant39tat39ve c sampling without replacement occurs when a single individual is only allowed 4 continuous quantitative to be in the sample one time d numerical measures that arithmetic can be performed on and 5 Simple random sample produce meaningful results e classi cation into groups Chapter 2 Organizing and Summarizing Data 21 vocabulary 1 distribution lists the number of data in categories or classes of data 2 distribution lists the proportion or percent of data in categories or classes 22 Discrete Data 1 In your own words explain what raw data is 2 The following data represent the percentage of people that have car insurance in the 50 united states and District of Columbia in 2005 42 106 126 148 178 189 214 86 92 96 96 97 102 105 106 109 109 113 114 116 123 130 133 134 139 140 143 147 155 159 159 161 161 161 162 181 183 183 184 184 186 187 194 196 197 206 211 212 213 214 222 25 With the rst class having a lower class limit of 4 and a class width of 2 a Construct a frequency distribution b Construct a relative frequency distribution c Construct a frequency histogram of the data d Construct a relative frequency histogram of the data e Describe the shape of the distribution f Repeat parts ae using a class width of 4 g Does one distribution better represent a summary of the data Explain Chapter 3 Numerically Summarizing Data 1 Catherine as part of a project for her statistics course surveyed 50 college school students and asked them in the past week how many days had they smoked marijuana The results are shown in the table below 0 0 1 4 1 1 1 5 1 3 0 1 0 1 0 4 0 1 0 1 0 0 0 0 2 0 0 0 0 0 1 0 2 0 0 0 1 2 1 1 2 0 1 0 1 3 1 1 0 3 a Is this data discrete or continuous b Draw a histogram of the data and describe its shape c Based on the shape of the histogram do you expect the mean to be more than equal to or less than the median d Determine the mean and median What does this tell you e Determine the mode 39 TestE I Testl a To the nearest integer what is the median of the variable x b To the nearest integer what is the third quartile of variable y c What variable has more dispersion Why d Describe the shape of variable x e Describe the shape of variable y f Are there any outliers in these two sets How do you know Chapter 4 Describing the Relation between two variables 1 The following data represent the number of drivers in various age groups and the number of fatal accidents within the age group by gender Age of male of crashes of female of crashes drivers drivers lt16 12 227 12 77 1620 6424 5180 6139 2113 2124 6941 5016 6816 1531 2534 18068 8595 17664 2780 3544 20406 7990 20063 2742 4554 19898 7118 19984 2285 5564 14340 4527 14441 1514 6574 8194 2274 8400 938 lt74 4803 2022 5375 980 a On the same graph draw a scatter diagram for both males and females Treat number of drivers as the explanatory variable b Based on the diagrams do you believe insurance companies have sufficient reason to charge female and males different rates Why c Compute the linear correlation coef cient between number of drivers and number of crashes for males d Compute the linear correlation coef cient between number of drivers and number of crashes for females e Which gender has a stronger linear relation between number of drivers and number of crashes Why

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