Given two dependent random samples with the following results:

Population 149

4936

3646

4623

2331

3136

3641

41Population 236

3630

3042

4237

3724

2423

2327

27

Use this data to find the 98%

98% confidence interval for the true difference between the population means.

Let d=(Population1entry)(Population2entry)

d=(Population1entry)(Population2entry). Assume that both populations are normally distributed.

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Step1of4:Find the mean of the paired differences,x

d

xd. Round your answer to one decimal place.