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nordsb [41]
3 years ago
9

A researcher wants to test the claim that the proportion of men and women who exercise regularly is not the same. He finds that

42 of 65 randomly selected men and 34 of 52 randomly selected women report exercising regularly. A 90% confidence interval for the difference in population proportions is (−0.154, 0.138).
1. Which of the statements gives the correct outcome of the researcher's test of the claim?
A) Because the confidence interval includes zero, the researcher can conclude the proportion of men and women who exercise regularly is the same.
B) Because the confidence interval includes zero, the researcher can conclude the proportion of men and women who exercise regularly may be the same.
C) Because the confidence interval includes zero, the researcher can conclude the proportion of men and women who exercise regularly is different.
D) Because the confidence interval includes more positive than negative values, the researcher can conclude that a greater proportion of men than women exercise regularly.
E) The researcher cannot draw a conclusion about a claim without performing a significance test.
Mathematics
1 answer:
atroni [7]3 years ago
3 0

Answer:

A.Because the confidence interval includes zero, the researcher can conclude the proportion of men and women who exercise regularly is the same.

Step-by-step explanation:

When the null value is contained in the confidence interval we tend to fail to reject the null hypothesis.

Here, the hypothesis according to scenario are

Null hypothesis: The Proportion of men and women who exercise regularly is  same i.e. p1-p2=0.

Alternative hypothesis: The proportion of men and women who exercise regularly is not the same i.e. p1-p2≠0.

The null value here is 0. As the confidence interval is (-0.154,0.138) and it contains 0, so we fail to reject the null hypothesis and conclude that the proportion of men and women who exercise regularly is the same.

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4 0
2 years ago
Which set of measurements could represent the three sides of a triangle?
yawa3891 [41]

Answer:

The side lengths of a right triangle is 11cm, 60cm and 61cm, that could be selected from the given measurements.

Step-by-step explanation:

The measurements are,

                  7cm, 11cm, 54cm, 60cm, 61cm, 65cm

Step:1

                 To check the right angle triangle, Pythagorean theorem can be used.

                For a Pythagorean theorem,

                                     ..........................(1)

               The side values are lower than the hypotenuse,

                                                        ...................................(2)

               Where,

                         a,b - side values

                            c - Hypotenuse

               For right angle triangle,  c > a, b

               Alternative : 1

               Take, a = 7cm, b = 11cm

               From eqn (2),

                                                   =  = 13.04

              The above value is not equal to the any one of the values of ( 54cm. 60cm, 61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 2

               Take, a = 7cm, b = 54cm

               From eqn (2),

                                                   =  = 54.45

              The above value is not equal to the any one of the values of (60cm, 61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 3

               Take, a = 7cm, b = 60cm

               From eqn (2),

                                                   =  = 60.406

              The above value is not equal to the any one of the values of (61cm, 65cm ), So its not an sides of right triangle.

               Alternative : 4

               Take, a = 7cm, b = 61cm

               From eqn (2),

                                                   =  = 61.40

              The above value is not equal to the values of (65cm ), So its not an sides of right triangle.

                 Alternative : 5

               Take, a = 11cm, b = 54cm

               From eqn (2),

                                                   =  = 55.1089

              The above value is not equal to the any one of the values of (60cm, 61cm, 65cm ), So its not an sides of right triangle.      

                Alternative : 6

               Take, a = 11cm, b = 60cm

               From eqn (2),

                                                  =  = 61

              The above value is equal to the values of (61cm ), So its an sides of right triangle. The three sides are 11, 60 and 61.

Step:2

            Check for solution,

                                     

                                           

Result:

            The side lengths of a right triangle is 11cm, 60cm and 61cm, that could be selected from the given measurements.                

Step-by-step explanation: The side lengths of a right triangle is 11cm, 60cm and 61cm.

4 0
3 years ago
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