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Mathematics, 15.11.2019 04:31 michaelandtammytrice
According to a marketing research study, american teenagers watched 16.5 hours of social media posts per month last year, on average. a random sample of 20 american teenagers was surveyed and the mean amount of time per month each teenager watched social media posts was 17.3. this data has a sample standard deviation of 2.1. (assume that the scores are normally distributed.)
researchers conduct a one-mean hypothesis at the 10% significance level to test if the mean amount of time american teenagers watch social media posts per month is greater than the mean amount of time last year.
which answer choice shows the correct null and alternative hypotheses for this test?
select the correct answer below:
h0: μ=17.3; ha: μ< 17.3, which is a left-tailed test.
h0: μ=17.3; ha: μ> 17.3, which is a right-tailed test.
h0: μ=16.5; ha: μ< 16.5, which is a left-tailed test.
h0: μ=16.5; ha: μ> 16.5, which is a right-tailed test.
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Answers: 1
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]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle
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