Question

# Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...

Consider the following results for two independent random samples taken from two populations.

 Sample 1 Sample 2 n 1 = 40 n 2 = 30 x 1 = 13.4 x 2 = 11.9 σ 1 = 2.3 σ 2 = 3.2
1. What is the point estimate of the difference between the two population means? (to 1 decimal)
2. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table.
( , )
3. Provide a 95% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. If your answer is negative, enter minus (-) sign.
( , )

Part a) Part b)

Confidence interval :-   Lower Limit = Lower Limit = 0.3681
Upper Limit = Upper Limit = 2.6319
Confidence interval is ( 0.37 , 2.63 )

Part c)

Confidence interval :-   Lower Limit = Lower Limit = 0.1512
Upper Limit = Upper Limit = 2.8488
Confidence interval is ( 0.15 , 2.85 )

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