Exam 2: Organising and Visualising Data

Figure 2.2 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Figure 2.2,the number of job applicants who scored between 30 and below 60 is _________.

If you wish to construct a graph of a relative frequency distribution,you would most likely construct an ogive first.

Instruction 2.9 A sample of 200 students at a large university was taken after the final exam to ask them whether they went out on the weekend before the exam or spent the weekend studying, and whether they did well or poorly on the exam. The following table contains the result. Did Well on Exam Did Poorly on Exam Studying for Exam 80 20 Went out on the weekend 30 70 -Referring to Instruction 2.9,if the sample is a good representation of the population,we can expect _________ % of those who did poorly on the exam to have spent the weekend studying.

Instruction 2.3 A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below. Stem Lesves 3 24 4 0347899 9 5 0112345 6 12566 7 01 8 9 2 -Referring to Instruction 2.3,what percentage of the respondents rated overall television quality with a rating of 80 or above?

You have collected information on the market share of five different search engines used by Australian Internet users in June 2012.Which of the following is the best for presenting the information?

Instruction 2.5 The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in the Supreme Court of Victoria. Stem Leaves 1 23444 1 7899 2 2222345 5 2 678889 3 001113 3 5778 4 0234 4 5579 5 1124 5 66 6 15 6 8 Note: 1L means the 'low teens' - 10, 11, 12, 13, or 14; 1H means the 'high teens' - 15, 16, 17, 18, or 19; 2L means the 'low twenties' - 20, 21, 22, 23, or 24, etc. -Referring to Instruction 2.5,_________ % of the cases were not adjudicated within the first four years.

Figure 2.2 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Figure 2.2,half of the job applicants scored below_________.

Facebook collected information on the age of their users.The youngest user was 13 and the oldest was 96.To study the percentage of their users who are below a certain age,it can use an ogive.

Instruction 2.10 The table below contains the opinions of a sample of 200 people broken down by gender about the latest government plan to eliminate restraint of trade exemptions for professional sporting leagues. For Netural Ageinst Totals Female 38 54 12 104 Male 12 39 48 96 Totals 50 60 200 -Referring to Instruction 2.10,if the sample is a good representation of the population,we can expect _________% of the population will be males.

Instruction 2.8 Given below is the stem-and-leaf display representing the amount of detergent used in litres (with leaves in 10ths of litres) in a month by 25 drive-through car wash operations in Auckland. Stem Leaves 9 147 10 02238 11 135566777 12 223489 13 02 -Referring to Instruction 2.8 construct a frequency distribution for the detergent data,using '9.0 but less than 9.9 litres' as the first class.

Instruction 2.11 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Fermale Yes 96 40 No 224 240 -Referring to Instruction 2.11,_________ % of the 600 did not own a portable DVD.

Data on 1,500 students' weight were collected at a university in Melbourne,Victoria.Which of the following is the best chart for presenting the information?

Instruction 2.11 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. Own a Portable DVD Player Male Fermale Yes 96 40 No 224 240 -Referring to Instruction 2.11,of the females in the sample,_________% owned a portable DVD.

Instruction 2.4 The following are the durations in minutes of a sample of long-distance phone calls made within Australia reported by one long-distance carrier. Time (in Minutes) Relative Frequency 0 but less than 5 0.37 5 but less than 10 0.22 10 but less than 15 0.15 15 but less than 20 0.10 20 but less than 25 0.07 25 but less than 30 0.07 30 or more 0.02 -Referring to Instruction 2.4,if 100 calls were sampled,_________ of them would have lasted less than 5 minutes or at least 30 minutes or more.

The relative frequency is the frequency in each class divided by the total number of observations.

Instruction 2.7 The ordered array below resulted from taking a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. Defeds 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 -Referring to Instruction 2.7,if a frequency distribution for the defects data is constructed,using '0 but less than 5' as the first class,the frequency of the '20 but less than 25' class would be _________.

Instruction 2.10 The table below contains the opinions of a sample of 200 people broken down by gender about the latest government plan to eliminate restraint of trade exemptions for professional sporting leagues. For Netural Ageinst Totals Female 38 54 12 104 Male 12 39 48 96 Totals 50 60 200 -Referring to Instruction 2.10,_________% of the 200 were against the plan.

Instruction 2.10 The table below contains the opinions of a sample of 200 people broken down by gender about the latest government plan to eliminate restraint of trade exemptions for professional sporting leagues. For Netural Ageinst Totals Female 38 54 12 104 Male 12 39 48 96 Totals 50 60 200 -Referring to Instruction 2.10,of the females in the sample,_________ % were either neutral or against the plan.

A professor of economics at a Tasmanian university wanted to determine which students were taking his tough economics course.Shown below is a pie chart of the results.What percentage of the class took the course prior to reaching their honours year?

Research on human perception concludes that the bar chart is preferred to the pie chart,because the human eye can more accurately judge length comparisons against a fixed scale (as in a bar chart)than angular measures (as in a pie chart).