Olive Garden Swiss Chalet
Sample size 50 45
Sample mean $22 $18
Standard deviation $3.00 $3.25

How do I create interval estimate for the difference between the average fees of the 2 restaurants at a confidence co-effiecent at 95 %

What do I need to do to find out the difference in amount spent at the restaurants (sample means)? What test statistic do I use? I thought I should use the z-test because the sample size was greater than 30.

Solution Preview

This is a test of difference in sample means
Usually we use t test, but in this question you might use z stat as well, given the large sample size.

Find the 95% confidence interval for the difference between the two means
Let Md=µ1-µ2= 22-18 = 4
In the general formula, the estimated standard error, SMd, is computed assuming that the variances in the two populations are equal. when n1 ≠ n2. The ...

Solution Summary

The expert determines how to create interval estimate for the difference between the average fees of the 2 restaurants at a confidence coefficient at 95 %

What do I need to do to find out the difference in amount spent at the restaurants (sample means)? What test statistic do I use? I thought I should use the z-test because the sample size was greater than 30.

Statistics Coefficient Importance. DQ 1 If we wish to have a 95% confidence interval, what would be the value of the confidence coefficient? [Hint: Table 4B]. ...

Confidence interval estimation for regression coefficients. 1 What is the R^2 Value for your regression equation? 2 What is the value of the coefficient of Blue ...

... method to compute the regression coefficients b0 and b ... 13 1936 339 e. Determine coefficient of determination ... 369 j. Construct a 95% confidence interval estimate ...

... (That is, explain the meaning of the coefficients.). ... (D) Calculate the coefficient of correlation. ... (G) What is the 95% confidence interval for the number of ...

Determining Sample Correlation Coefficients. ... Determine the sample correlation coefficient between X and Y ... Find a 90% confidence interval for the slope of the ...

... Here the confidence interval also contain the value zero. ... Correlation coefficient Pearson Correlation Coefficients, N = 32 Prob > |r| under H0: Rho ...

... specify and interpret the 95% confidence interval for the population regression coefficient, using the units of the variables. Coefficients Standard Error ...