Consider the research design described above. The results from the recylcing study are as follows:

Treatment group mean: 4.00

Control group mean: 3.70

Sample size: 50

Standard error of the differences between the means: 0.80

Computer the lower bound of the confidence interval. (See the formula.) You may use this websiteto obtain the critical value for the t-test. Make sure to use .05 for the two-tailed probability and use the "two-tailed T value" in your calculation. Or you can use a standard table of critical t-values. And make sure to use the treatment group mean as "Mean 1" in the formula

CI Lower X crit + (X -X