An industrial psychologist feels that a big factor in job turnover among assembly line workers is the individual employee's self esteem. She thinks that workers who change jobs often (Population A) have, on the average, lower self-esteem, as measured by a standardized test, than workers who do not (Population B). To determine whether she can support her belief with statistical analysis, she draws a simple random sample of employees from each population, and gives each a test measuring self esteem. The results are as follows: Group A 60 45 42 62 68 54 52 55 44 41 Group B 70 72 74 74 76 91 71 78 76 78 83 50 52 66 65 53 52 The psychologist believes that the relevant population scores are normally distributed, with equal, although unknown, variances. At the 0.1 level of significance, what should she conclude

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Problem 5
An industrial psychologist feels that a big factor in job turnover among assembly line workers is
the individual employee's self esteem. She thinks that workers who change jobs often (Population
A) have, on the average, lower self-esteem, as measured by a standardized test, than workers who
do not (Population B). To determine whether she can support her belief with statistical analysis,
she draws a simple random sample of employees from each population, and gives each a test
measuring self esteem. The results are as follows:
Group A 60 45 42 62 68 54 52 55 44 41
Group B 70 72 74 74 76 91 71 78 76 78 83 50 52 66 65 53 52
The psychologist believes that the relevant population scores are normally distributed, with equal,
although unknown, variances. At the 0.1 level of significance, what should she conclude
Transcribed Image Text:Problem 5 An industrial psychologist feels that a big factor in job turnover among assembly line workers is the individual employee's self esteem. She thinks that workers who change jobs often (Population A) have, on the average, lower self-esteem, as measured by a standardized test, than workers who do not (Population B). To determine whether she can support her belief with statistical analysis, she draws a simple random sample of employees from each population, and gives each a test measuring self esteem. The results are as follows: Group A 60 45 42 62 68 54 52 55 44 41 Group B 70 72 74 74 76 91 71 78 76 78 83 50 52 66 65 53 52 The psychologist believes that the relevant population scores are normally distributed, with equal, although unknown, variances. At the 0.1 level of significance, what should she conclude
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