A researcher claims that the average refund of apprentice carpenters that filed income tax returns in the 2018 – 2019 fi

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A researcher claims that the average refund of apprenticecarpenters that filed income tax returns in the 2018 – 2019financial year was $1350. Based on prior experience a populationstandard deviation of $1190 may be assumed. For a sample of 420apprentice carpenters, the sample mean refund for the 2018 – 2019financial year was $1077. Test whether the researcher claim is trueat 5% significance level?
1. Ho: μo (the population mean) = (integer) $......
2.What is the P-value associated with this test? (2dp) ....
3.What is the estimated standard error of the sample mean? (1dp).....
4.Give the absolute value of the test statistic. (2dp).......
5.Using a significance level of 5%, you would ........( reject/not reject ) the null hypothesis.
6.Hence, the average refund of apprentice carpenters that filedincome tax returns in the 2018 – 2019 financial year ..........$1350.
Calculate a 95% CI for µ (DO NOT include $ sign in youranswers): (lower limit, upper limit) = ( __._ , __._ )
lower limit (1 dp)......
upper limit (1 dp)....