Exam 2: Organising and Visualising Data

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,the person who visited the health club more than anyone else in the sample visited the facility _________ times.

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 50 or below?

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 construct a table of row percentages.

Any two-dimensional graph should contain a _________for each axis.

Instruction 2.2 At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer. x f 1 7 2 5 3 11 4 8 5 9 -Referring to Instruction 2.2,across all of the regional offices,how many total employees were supervised by those surveyed?

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,construct a relative frequency or percentage distribution for the defects data,using '0 but less than 5' as the first class.

Figure 2.1 Every second semester, the School of Business at a large university coordinates with local business leaders at a luncheon for graduating students, their families, and friends. Corporate sponsorship pays for the lunches of each of the graduating students, but students have to purchase tickets to cover the cost of lunches served to guests they bring with them. The following histogram represents the attendance at the luncheon, where X is the number of guests each graduating student invited to the luncheon and f is the number of graduating students in each category. -Referring to the histogram from Figure 2.1,how many graduating students attended the luncheon?

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,of those who went out on the weekend before the exam in the sample,_________ % of them did well on the exam.

The width of each bar in a histogram corresponds to the

In a contingency table,the number of rows and columns

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,if a percentage histogram for the detergent data is constructed,using '9.0 but less than 9.9 litres' as the first class,the percentage of drive-through car wash operations that use '12.0 but less than 12.9 litres' of detergent would be _________.

In general,grouped frequency distributions should have between 1 and 5 class intervals.

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 randomly sampled,how many calls lasted 15 minutes or longer?

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,construct a table of column percentages.

Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 Australian companies.There appears to be a positive relationship between price/earnings ratio and earnings per share.

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,_________ % of the applicants scored between 20 and below 50.

A contingency table is also referred to as a cross-classification table.

A research analyst was directed to arrange raw data collected on the yield of wheat,ranging from 1 to 5 tonnes per hectare,in a frequency distribution.He should choose 2 as the class interval width.

Retailers are always interested in determining why a customer selected their store to make a purchase.A clothing retailer conducted a customer survey to determine why its customers shopped at the store.The results are shown in the bar chart below.What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience?

_________analytics investigates what should occur and prescribes the best course of action for the future.