Recent research suggests that children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this relationship, a researcher obtains a random sample of n = 36 children aged 8-12 yrs old who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time they spend watching TV. The average daily TV time in the sample is 4.9 hours. It is known that in the population of 8-12 yr old children, μ = 4.1 hrs, σ = 1.8, and is normally distributed. If the researcher had only used a sample of n = 9 children and obtained the same sample mean, would the results be sufficient to reject H0? Use an α = .05. Question 1: Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n =9 (MUST SHOW WORK FOR THIS PROBLEM)? Group of answer choices a. Ho: µ ≥ 4.1, H1: µ < 4.1 b. Ho: µ ≤ 4.1, H1: µ > 4.1 c. Ho: µ = 4.1, H1: µ ≠ 4.1 d. Ho: µ > 4.1, H1: µ ≤ 4.1 Question 2: Which of the following represents the critical region for this mentioned sample (MUST SHOW WORK FOR THIS PROBLEM)? Group of answer choices a. z = ±1.65 b. z = 1.62 c. z = -1.65 d. z = 1.65 Question 3: Compute the test statistic (z-observed) for the mentioned sample (MUST SHOW WORK FOR THIS PROBLEM).

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Please use the following information to answer questions 26-29:

Recent research suggests that children with ADHD tend to watch more TV than children who are not diagnosed with the disorder. To examine this relationship, a researcher obtains a random sample of n = 36 children aged 8-12 yrs old who have been diagnosed with ADHD. Each child is asked to keep a journal recording how much time they spend watching TV. The average daily TV time in the sample is 4.9 hours. It is known that in the population of 8-12 yr old children, μ = 4.1 hrs, σ = 1.8, and is normally distributed.

If the researcher had only used a sample of n = 9 children and obtained the same sample mean, would the results be sufficient to reject H0? Use an α = .05.

Question 1: Which of the following correctly represents the null and alternative hypothesis for the mentioned sample of n =9 (MUST SHOW WORK FOR THIS PROBLEM)?

Group of answer choices

a. Ho: µ ≥ 4.1, H_1:µ < 4.1

b. Ho: µ ≤ 4.1, H_1:µ > 4.1

c. Ho: µ = 4.1, H_1:µ ≠ 4.1

d. Ho: µ > 4.1, H_1:µ ≤ 4.1

Question 2: Which of the following represents the critical region for this mentioned sample (MUST SHOW WORK FOR THIS PROBLEM)?

Group of answer choices

a. z = ±1.65

b. z = 1.62

c. z = -1.65

d. z = 1.65

Question 3: Compute the test statistic (z-observed) for the mentioned sample (MUST SHOW WORK FOR THIS PROBLEM).

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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