Construct a Confidence Interval For $\mu _ { \mathrm { d } }$

question 176

Essay

Construct a confidence interval for $\mu _ { \mathrm { d } }$ , the mean of the differences d for the population of paired data. Assume that the
population of paired differences is normally distributed.
-Use the summary statistics below to test the claim that the samples come from populations with different
variances. Use a significance level of 0.05. $$\begin{array} { l l l } \frac { \text { Sample A } } { \mathrm { n } = 28 } & & \frac { \text { Sample B } } { \mathrm { n } = 41 } \\\overline { \mathrm { x } } 1 \mathrm { 1 } = 19.2 & & \overline { \mathrm { x } } _ { 2 } = 23.7 \\\mathrm {~s} = 4.78 & & \mathrm {~s} = 5.93\end{array}$$

---

Definitions:

Journal

A detailed record of all the financial transactions of a business, which are initially documented before summarizing in the ledger.

Posting

The process of transferring journal entry amounts to ledger accounts in accounting.

Analyze Each Transaction

The process of closely examining financial transactions to ensure they are accurately recorded in the correct accounts.

Journal

A journal is a detailed account that records all the financial transactions of a business, to be used later for classifying and summarizing into financial statements.