3. A random sample of 10 chocolate bars of a certain brand yielded the following amount of calories content. -----m-ms- Is this in line with the manufacturer's claim that the average calories content does not exceed to 3.0? Use {1 :0.05. 4. Professor X wishes to test whether or not the On-line class method of teaching is more effective than the Face to Face class method. He selected two class sections (same course and program) of approximately equal intelligence (based on administered IQ Test). He gathered sample of 20 students to whom he used the On-line class method and another sample of 15 students to whom he used Face to face class method. After the experiment, an objective test revealed that the rst samples got mean scores of 30.5 with standard deviation of 5.Whi1e the second group got a mean score of 28.0 with a standard deviation of 4.5.Based on the result , can we sat that the On-line class method is more effective the Face to face class method