The Human Resource Manager at a manufacturing plant noticed that there was a high rate of absenteeism, lack of motivation, reduced cooperation and low productivity among the employees. She suspected that the employees' morale had decreased. The Human Resource Manager decided to select the first 100 employees who arrived to work on a certain day and ask them to complete an employee morale survey. Each employee's level of morale was measured between 1 to 15 inclusive; with 15 indicating the highest level of employee morale. The data was summarized in Table 1 below. TABLE 1 Level of Employee morale 1-3 4-6 7-9 10-12 13-15 Number of Employees 8 26 40 18 8 a) Identify the population for this investigation. b) Identify the sample for this investigation. c) Identify the sampling method that was used to select the sample. Give one advantage and one disadvantage of using this sampling method. d) For each of the following charts: stem-and-leaf diagram, box-and-whisker diagram, bar chart and histogram, indicate whether or not the chart would be suitable for presenting the data displayed in Table 1 above. Give reason for your answer. e) Use Table 1 to calculate: i. ii. iii. the mean employees' morale. the median The mode

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The Human Resource Manager at a manufacturing plant noticed that there was a high rate of
absenteeism, lack of motivation, reduced cooperation and low productivity among the
employees. She suspected that the employees' morale had decreased. The Human Resource
Manager decided to select the first 100 employees who arrived to work on a certain day and ask
them to complete an employee morale survey. Each employee's level of morale was measured
between 1 to 15 inclusive; with 15 indicating the highest level of employee morale. The data was
summarized in Table 1 below.
TABLE 1
e)
Level of Employee morale
1-3
4-6
7-9
10-12
13-15
a) Identify the population for this investigation.
b) Identify the sample for this investigation.
c) Identify the sampling method that was used to select the sample. Give one advantage and
one disadvantage of using this sampling method.
d)
For each of the following charts: stem-and-leaf diagram, box-and-whisker diagram,
bar chart and histogram, indicate whether or not the chart would be suitable for
presenting the data displayed in Table 1 above. Give reason for your answer.
Use Table 1 to calculate:
i.
ii.
111.
Number of Employees
8
26
40
18
8
the mean employees' morale.
the median
The mode
Transcribed Image Text:The Human Resource Manager at a manufacturing plant noticed that there was a high rate of absenteeism, lack of motivation, reduced cooperation and low productivity among the employees. She suspected that the employees' morale had decreased. The Human Resource Manager decided to select the first 100 employees who arrived to work on a certain day and ask them to complete an employee morale survey. Each employee's level of morale was measured between 1 to 15 inclusive; with 15 indicating the highest level of employee morale. The data was summarized in Table 1 below. TABLE 1 e) Level of Employee morale 1-3 4-6 7-9 10-12 13-15 a) Identify the population for this investigation. b) Identify the sample for this investigation. c) Identify the sampling method that was used to select the sample. Give one advantage and one disadvantage of using this sampling method. d) For each of the following charts: stem-and-leaf diagram, box-and-whisker diagram, bar chart and histogram, indicate whether or not the chart would be suitable for presenting the data displayed in Table 1 above. Give reason for your answer. Use Table 1 to calculate: i. ii. 111. Number of Employees 8 26 40 18 8 the mean employees' morale. the median The mode
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