Mathematics, 10.04.2020 04:57, rleiphart1
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.
Answers: 2
Mathematics, 21.06.2019 17:00, anniekwilbourne
For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.
Answers: 3
Mathematics, 21.06.2019 19:10, hannahbannana98
If i have 20$ and i gave 5$ away how much i got
Answers: 1
Mathematics, 21.06.2019 19:30, lovelyheart5337
In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.
Answers: 2
Mathematics, 21.06.2019 20:20, SESDMANS9698
Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.
Answers: 1
According to a marketing research study, American teenagers watched 16.5 hours of social media posts...
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