can you solve this with explanation

A researcher examined the effectiveness of a new sleep

medication compared with placebo. People were randomly

assigned to receive the medication or placebo. Sleep times

were measured (in hours).

Here are the data:

Medication group: M = 6 hrs, SD = 2 hrs, n = 20

Placebo group: M = 5.0 hrs, SD = 3 hrs, n = 20

. Name the independent and dependent variables Compute an independent-samples t test ( = .05, two-tailed) using GraphPad.comQuickCalcs and write down the following:

Null and alternative hypotheses being tested

Value of t, df, Std. Error of the Difference, p-value, critical value of t, 95% confidence interval for the mean difference.

Your decision about the null based on the critical value and the p-value

2-

Now imagine the same scenario, but with larger sample sizes

Here are the data:

Medication group: M = 6 hrs, SD = 2 hrs, n = 60

Placebo group: M = 5.0 hrs, SD = 3 hrs, n = 60

Compute an independent-samples t test ( = .05, two-tailed) using GraphPad.com QuickCalcsand write down the following:

Null and alternative hypotheses being tested Value of t, df, Std. Error of the Difference, p-value, critical value of t, 95% confidence interval for the mean difference.

Your decision about the null based on the critical value and the p-value

What happened in the t test and the confidence interval when we increased the sample size from 20 to 60 participants per group?