The following set of data represents the distribution of annual
salaries of a random sample of
100managers...
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Statistics
The following set of data represents the distribution of annualsalaries of a random sample of
100managers in a large multinationalcompany:
Salary range (£` 000' )
Managers
20 but under 25
25 but under 30
30 but under 35
35 but under 40
40 but under 45
45 but under 50
5
10
25
35
25
5
Calculate the mean and standard deviation. [5 Marks]
The company chairman claims that the managers in the companyearn on average annual salary in excess of £ 35,500. Use the resultin (i) to test the chairman’s claim at 5% level of significance. [5Marks]
sample size is 105. thanks
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