chin typically spent 2.5 hours per day filing paper records. After a new filng system was implemented, he now spends 1 hour per
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Answer:
The 90% confidence interval is
Step-by-step explanation:
From the question we are told that
The sample mean for men is
The sample mean for women is
The sample size for men is
The sample size for women is
The standard deviation for men is
The standard deviation for women is
From the question we are told the confidence level is 90% , hence the level of significance is
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Generally from the normal distribution table the critical value of is
Generally the standard error is mathematically represented as
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Generally the margin of error is mathematically represented as
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Generally 90% confidence interval is mathematically represented as
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