Mathematics, 17.03.2020 04:27, oofoofoof1
A researcher wants to test the claim that the proportion of boys who play with blocks regularly is greater than the proportion of girls who play with blocks regularly. She finds that 23 of 51 randomly selected boys and 17 of 23 randomly selected girls report playing with blocks regularly. A 98% confidence interval for the difference in population proportions is (−0.5558, −0.0205). Which of the statements gives the correct outcome of the researcher's test of the claim?
a. The researcher cannot draw a conclusion about a claim without performing a significance test.
b. Because the confidence interval is negative, the researcher can conclude the proportion of boys and girls who play with blocks regularly is the same.
c. Because the confidence interval is negative, the researcher can conclude the proportion of boys and girls who play with blocks regularly may be the same.
d. Because the confidence interval is negative, the researcher can conclude there is a greater proportion of boys who play with blocks regularly.
e. Because the confidence interval is negative, the researcher can conclude there is a greater proportion of girls who play with blocks regularly.
Answers: 3
Mathematics, 21.06.2019 12:30, masad
Acamper leaves camp on a kayak and travels 50 miles east on a river, then he ties his kayak to the bank and travels 20 miles north on a bicycle. this trip can be plotted on the coordinate plane, where the camp is the point (0, 0). the distant of the camper to the camp can be found using the distance formula. which other formula can he use? a) 502 - 202 b) 502 + 202 c) 502 - 202 d) 502 + 202
Answers: 1
Mathematics, 21.06.2019 16:40, sandygarcia65
What is the solution of the systems of equations? y=2/3x+3 x=-2
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Mathematics, 21.06.2019 17:20, organicmemez
Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?
Answers: 2
A researcher wants to test the claim that the proportion of boys who play with blocks regularly is g...
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