1. Fill in the blanks for each of the statements below.а.A survey of 1000 U.S. adults found that 40% think the internet is the best way to get news andinformation.Population:Sample:Variable of Interest:Type of Data (Qualitative or Quantitative):Is the 40% a parameter or statistic, and why?b. A survey of the 55 law firms in a local city found that the average hourly billing rate is $425.Population:Sample:Variable of Interest:Type of Data (Qualitative or Quantitative):Is the $425 a parameter or statistic, and why?.

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Answered: 1. Fill in the blanks for each of the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Read the following on attendance and grades, and answer the questions. A study revealed that students from a certain local college in Bulacan who attended class 95 to 100% of the time usually received a grade of 1.0 in the class. Students who attended class 80 to 90% of the time usually received a 1.5 or 1.75 in the class. Students who attended class less than 80% of the time usually received a 3 or a 5 or eventually withdrew from the class. Many factors affect a student’s grade in a course. One factor that has considerable control over is attendance. One can increase the opportunities for learning by attending class more often. 1. What are the variables under study? Answer: 2. Which are the dependent and independent variables in the study? Answer: 3. Categorize each variable as quantitative or qualitative. Answer: 4. Categorize each quantitative variable as discrete or continuous. Answer: 5. Identify the level of measurement for each variable. Answer: 6. Are descriptive,…
3. A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 sub-scribers. Fifty- nine percent of the respondents indicated an annual income of $ 75,000 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross- sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey. 4. Table 1.8 shows a data set containing information for 25 of the shadow stocks tracked by the American Association of Individual Investors. Shadow stocks are common stocks of smaller companies that are not closely followed by Wall Street analysts. The data set is also on the website that accompanies the text in the file named Shadow02. a. How many variables are in the data set?…
The Bureau of Labor Statistics provides the annual average unemployment rate (civilian workforce 16 years and older) in the United States. This information is given in the following table. Year Unemployment Rate 2006 4.6% 2007 4.6% 2008 5.8% 2009 9.3% 2010 9.6% 2011 8.9% (a) Which of the following explanations is the BEST reason for NOT using a pie chart to represent this data? (Choose only one.) Bar charts are always better representations of data. There are too many years for a pie chart to useful. The numbers do not add to 100%. Each of the percentages comes from a different base. That is, each of the percentages are not part of the same whole. (b) Think about the similarities and differences of pie charts, bar graphs, and histograms. Select ALL of the following statements that are TRUE. Pie charts and bar graphs are used to compare variables while histograms are used to examine the distribution of data. Pie charts, bar graphs, and histograms can…
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A recent report stated that in 1990, there were approximately 9.7 million employment opportunities in a Science, Technology, Engineering or Mathematics (STEM) related field. There is a reported 17.3 million positions available in a STEM related field in 2019. What is the relative change in the number of STEM positions available from 1990 to 2019? A. 7.6% B. 56.1% C. 43.9% D. 78.4%
A congressperson wants to come up with a single value to describe the prices of homes in their district. However, their district consists of a few homes that are extremely expensive compared to the others. Which descriptive statistic should they use? a. Range b. Mode c. Median d. Mean
Researchers want to estimate the percentage of people who thought drinking and driving was a serious problem. Reserchers waited outside a bar to question people. They usually find 11%of bar patrons believe drinking and driving is a serious problem. a. identify the populatin of interest b. identify the sample c. identify the population parameter of interest d. identifywho if anyone was left out of the study
Read the following on attendance and grades, and answer the questions. A study revealed that students from a certain local college in Bulacan who attended class 95 to 100% of the time usually received a grade of 1.0 in the class. Students who attended class 80 to 90% of the time usually received a 1.5 or 1.75 in the class. Students who attended class less than 80% of the time usually received a 3 or a 5 or eventually withdrew from the class. Many factors affect a student’s grade in a course. One factor that has considerable control over is attendance. One can increase the opportunities for learning by attending class more often. a. From the information given, comment on the relationship between the variables Answer: b. What type of survey do you think is most appropriately used for the study? Answer: c. Do you think the use a random method for deciding who would be in the sample is appropriate? Why? Answer:
Statistics Question
The world Almanac and book of facts 2004 reported the percentage of people not covered by health insurance in the 50 states and Washington DC for the year 2002.the percent of people not covered by health insurance is summarized in the table below: Min 7.9 Q1 10.8 Median 13.4 Q3 16.7 Max 25.8 Mean 13.9 Std.dev 3.6
A............ is a table that shows the number of data observations that fall into specific intervals. O a. Pareto chart O b. percent polygon c. frequency distribution O d. histogram
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