A researcher is in investigating the relationship between sugar consumption and

Question

A researcher is in investigating the relationship between sugar consumption and weight gain for high school students. Fifteen volunteers were randomly assigned to one of two groups. The first group contained six volunteers who were put on a low-sugar diet. The second group consisting of the remaining nine volunteers was put on a diet with sugar constituting approximately 15% of their diet. After eight weeks, the change in weight was recorded for each of volunteers. This study uses the principles of a. randomization. b. confounding c. blocking d. All of the above A population has an equal proportion of males and females. That is, when randomly selecting one individual, the probability that the individual is male (M) is 1/2 and the probability that the individual is female (F) is 1/2. Each of the outcomes M and F have a probability 1/2 of occurring. This means that a. in the next four randomly selected individuals, exactly two of the outcomes will be M. b. in the next four randomly selected individuals, the outcomes will alternate MFMF or FMFM. c. in the next four randomly selected individuals, they can't all be the same outcome. d. None of the above A population has an equal proportion of males and females. That is, when randomly selecting one individual, the probability that the individual is male (M) is 1/2 and the probability that the individual is female (F) is 1/2 There are only two outcomes when an individual is selected: (M. F). This collection of all possible outcomes is called a. a census b. the probability. c. the sample space. d. the distribution. A population has an equal proportion of males and females. That is, when randomly selecting one individual, the probability that the individual is male (M) is 1/2 and the probability that the individual is female (F) is 1/2. In the first 50 randomly selected individuals, 20 were male. In the next 50 randomly selected individuals, which of the following must happen? a. More than half of the individuals will be males to balance out the low number of males in the first 50 individuals. However, the order in which these males will be selected is unpredictable. b More the individuals will be males because the proportion of males after 100 individuals must be closer to 1/2 than the proportion after 50 individuals.

Explanation / Answer

Q-35

Part-a as confounding and blocking are not done

Q-36

Part-d as exactly is not used and alternate are not sure and next four can not be predicted

Q-37

Part-c this is by definition of sample space which contains all outcomes

Q-38

Part-a by large number of trials theory

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