Mathematics, 25.09.2020 01:01, haleyblu6281
According to the Centers for Disease Control and Prevention (February 18, 2016), 1 in 3 American adults don’t get enough sleep. A researcher wants to determine if Americans are sleeping less than the recommended 7 hours of sleep on weekdays. He takes a random sample of 150 Americans and computes the average sleep time of 6.7 hours on weekdays. Assume that the population is normally distributed with a known standard deviation of 2.1 hours. Test the researcher’s claim at α = 0.01. (You may find it useful to reference the appropriate table:z table or t table)a. Select the relevant null and the alternative hypotheses. H0: μ = 7; HA: μ ≠ 7H0: μ ≤ 7; HA: μ ≥ 7H0: μ ≥ 7; HA: μ < 7b. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.)Test statistic = ?c. Find the p-value. p-value < 0.010.01 ≤ p-value < 0.0250.025 ≤ p-value < 0.050.05 ≤ p-value < 0.10p-value ≥ 0.10d. What is the conclusion at α = 0.01?Reject H0 since the p-value is greater than α.Reject H0 since the p-value is smaller than α.Do not reject H0 since the p-value is greater than α.Do not reject H0 since the p-value is smaller than α.e. Make an inference. There is insufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep. There is sufficient evidence to suggest that Americans sleep less than the recommended 7 hours of sleep.
Answers: 3
Mathematics, 21.06.2019 17:00, raymondmunoz4451
Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars
Answers: 1
Mathematics, 21.06.2019 17:30, peperivera2652738
Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3
Answers: 2
Mathematics, 22.06.2019 07:00, htx88
Out of 8 boys and 6 girls in a high school, a team of seven students is selected. what is the probability that three boys and four girls are selected? in your response, include an explanation and all of the calculations necessary to determine the probability.
Answers: 2
According to the Centers for Disease Control and Prevention (February 18, 2016), 1 in 3 American adu...
Biology, 25.03.2021 23:50
English, 25.03.2021 23:50
Social Studies, 25.03.2021 23:50
English, 25.03.2021 23:50