Monday
March 2, 2015

Homework Help: statistics

Posted by donna on Tuesday, May 27, 2014 at 11:04am.

A company director took a sample of salaries of 13 employees in a big school during a certain time. she divided the wages into three groups according to the different jobs: teachers, assistants and coordinators as displayed in the table below. She wanted to find out whether or not the means of the salaries classified by the three jobs are significantly different. Let the level of significance be

(a) 5 % and

(b) 1 %.

Workers 1 2 3 4 5
Teachers 74 65 72 69 -

Assistants 75 78 74 76 72

Coordinators 56 55 53 52 -
Can someone please help me to solve this question. I tried setting a hypothesis but I dont know if that is correct. Do I have to compare means?

st.statistics

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