Chapter 1
Which of the following is a population in the statistical sense?
All fo the automobiles sold in Canada in 2016
How does statistics help us understand large amounts of numerical information?
a good working knowledge of statistics is useful to organize and summarize information
How has technology increased the need for statistical analysis?
vast amounts of data are collected and understanding it requires statistical knowledge
Which of the following is the best definition of a statistical population?
the entire set of individuals, objects or measurements of interest
Which of the following are examples of descriptive statistics?
- calculating summary measures of the prices of houses sold in Las Vegas in january - creating a pie chart to show majors of students in your business statistic class
Which of the following are reasons to study statistics?
- data is collected everywhere, and statistics is needed to translate that data into useful information - statistical knowledge is needed to understand the world and be conserving in your career - statistics are used to make personal and professional decisions
Which of the following are examples of inferential statistics?
- estimating the average weight in a box of apples by measuring the weight of 5 apples - counting the blue candies in a package of m&m's as a way to estimate the proportion of blue candies in all packages
T/F: the primary purpose of statistics is to present numerical data
TRUE
Which of the following is the best definition of a statistical sample?
a portion or part of the population of interest
What is descriptive statistics?
methods of organizing, summarizing, and presenting data in an informative way
T/F: Descriptive statistics uses the data to make inferences and predictions about a population based on a sample of data taken from the population in question
FALSE
Which three of the following are samples in the statistical sense?
- every eighth person on the class roster - ten apples selected from a grocery store bin containing 100 apples - 6 randomly chosen books from the library
Which of the following are examples of how organizations use statistics?
- retailers use product purchase data to manage the distribution of products and make marketing and sales decisions - google uses search engine data records to prioritize results for future searches
Which of the following represent statistical information?
- the median income in Wausau county is $40,578 per year - on average there are 12.5 chocolate chips in a Chips Hello cookie - lucky's market sells a maximum of 240 kilograms of apples per month
Which of the following are attributes of a discrete quantitative variable?
- there are gaps between the values of this variable - it can assume only certain values within a range - it can be used to count items
Which of the following examples are statistics?
- yesterday's share price for proctor and gamble stocks - the median price of a house in detroit - the number of home runs in last year's World Series
The 2 categories of statistical study are:
descriptive statistics and inferential statistics
