Researchers at a company that manufactures nutritional supplements want to compare a new muscle-building protein powder with their current best-selling muscle-building supplement by comparing the increase in muscle mass in subjects during a 3-month period. Of the following designs, which is the best method to collect the data? (A) Have subjects select which supplement they would like to use, then after 3 months compare the average increase in muscle mass for the two groups. (B) Randomly assign the subjects to two groups, giving the new supplement to one group increase in muscle mass for the two groups. and the current supplement to the other group, then after 3 months compare the average (C) Give the new supplement to the subjects who are classified as serious bodybuilders and the current supplement to the rest of the subjects. At the end of 3 months, compare the average increase in muscle mass for the two groups. (D) Give each subject both supplements to take on alternating nights. At the end of 3 months, see if there is a statistically significant average increase in muscle mass among all subjects. (E) Randomly assign the subjects to two groups, giving the new supplement to one group increase in muscle mass. and no supplement to the other group. At the end of three months, compare the average

A nutritionist need to study the daily protein intake of a client (during 3 week period), present in different food items and the data collected by him is as follows:32, 21, 12, 43, 16, 48, 56, 24, 40, 45, 34, 11, 43, 33, 25, 34, 55, 32, 22, 20, 42

1. The gain in weight of two random samples of patients fed on two different Diets: A and B are given below. Examine whether the difference in mean increase in weight is significant?Diet-A 13 14 10 11 2 16 10 8Diet-B 7 10 12 8 10 11 9 10 11

A researcher would like to determine whether exercising in the morning better in weight loss than exercising in the evening. Which method of data collection will be utilized by the researcher?*1 pointExperimentationInterviewObservationQuestionnaire

Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)Researcher ASurvival Length(in months) Frequency RelativeFrequency Cumulative RelativeFrequency0.5-6.5 6.5-12.5 12.5-18.5 18.5-24.5 24.5-30.5 30.5-36.5 36.5-42.5 42.5-48.5 Researcher BSurvival Length(in months) Frequency RelativeFrequency Cumulative RelativeFrequency0.5-6.5 6.5-12.5 12.5-18.5 18.5-24.5 24.5-30.5 30.5-36.5 36.5-45.5

Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)