A study was conducted to determine if the salaries of librarians
from two neighboring cities were equal. A sample of 15 librarians
from each city was randomly selected. The mean from the first city
was $28,900 with a standard deviation of $2300. The mean from the
second city was $30,300 with a standard deviation of $2100. Test
the hypothesis that the salaries from both cities are equal. Use α
= 0.025.
State the null and alternative hypotheses. p value , t test , is it
statement conclusion reject or fail .
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