Suppose that a randomized comparative experiment studies the effect of diet on blood pressure. Researchers divide 54 healthy white males at random into two groups. One group receives a calcium supplement, and the other group receives a placebo. At the beginning of the study, the researchers measure several variables on the subjects. The average seated systolic blood pressure of the 27 members of the placebo group is reported to be x = 114.9, with a standard deviation of s = 9.3. Give a 95% confidence interval for the mean systolic blood pressure of the population from which the subjects were recruited. Report your interval values to one decimal place. 95% confidence interval:

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A:

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Q: Identify the linear equation. O y=x2.4 Oy = Oy=+3 %3D O y= bd +5

A: Option (3) is correct.

Q: 5 X, + 3 X, + 2 X, = 11 4 X, + 8X, — 3 х, — 9 5 X, + 3 X, + 2 X = 15

A:

Q: Name the image of FLunder Ro.270 if O is the center of the picture.

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A: We need to draw the graph of y=x2x-2

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A: Given query is to find the which variation is inverse.

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Q: VA -5 10 %24

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Q: The variables aa, bb, and cc are related by the equation b=a2c−3b=a2c−3. If b=25b=25 and c=4c=4,…

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A:

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Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.