Researchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randormly selected 12 adolescents with alcohol use disorders. They wanted to determine whetherthe hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x= 8.49 and s = 0.8. Conductan appropriate test at the a= 0.01 level of significance.Choose the correct hypotheses.Ho:9.02V9.02Find the test statistic.to(Round to two decimal places as needed.)Find the P-valueThe P-value is(Round to three decimal places as needed.)What conclusion can be drawn?O A. Reject Ho. There is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cm esearchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders. They wanted to determine whethere hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x= 8.49 and s= 0.8. Conductn appropriate test at the a= 0.01 level of significance.Round to two decimal places as needed.)Find the P-value.The P-value is(Round to three decimal places as needed.)What conclusion can be drawn?O A. Reject Ho. There is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cm³.O B. Do not reject Ho. There is not sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are less than the normal volume of 9.02 cm.O C. Do not reject Ho There is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are less than the normal volume of 9.02 cm.O D. Reject Ho. There is not sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cm.

The following information has been provided: Normal Volume provided (μ)(\mu) = 9.029.02…

Researchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders. They wanted to determine wt the hippocampal volumes in the alcoholic adolescents were less than the normal volume of9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x= 8 49 and s 0.8. Co an appropriate test at the a= 0.01 level of significance. Choose the correct hypotheses. Ho: 9.02 9.02 Find the test statistic. to = (Round to two decimal places as needed.) Find the P-value. The P-value is (Round to three decimal places as needed.) What conclusion can be drawn? is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cm

Researchers wanted to measure the effect of alcohol on the development of the hippocampal region in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders. They wanted to determine wt the hippocampal volumes in the alcoholic adolescents were less than the normal volume of9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with x= 8 49 and s 0.8. Co an appropriate test at the a= 0.01 level of significance. Choose the correct hypotheses. Ho: 9.02 9.02 Find the test statistic. to = (Round to two decimal places as needed.) Find the P-value. The P-value is (Round to three decimal places as needed.) What conclusion can be drawn? is sufficient evidence to conclude that the hippocampal volumes in the alcoholic adolescents are greater than the normal volume of 9.02 cm

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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In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 17 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic 3 adolescents were less than the normal volume of 9.02 cm°. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x= 8.12 cm° and s = 0.7 cm°. Conduct the appropriate test at the a = 0.01 level of significance. State the null and alternative hypotheses. Ho:H %3D H1: µ < (Type integers or decimals. Do not round.)
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The accompanying data on x = head circumference z score (a comparison score with peers of the same age - a positive score suggests a larger size than for peers) at age 6 to 14 months and y = volume of cerebral grey matter (in ml) at age 2 to 5 years were read from a graph in an article. Cerebral GreyMatter (ml) 2-5 yr Head Circumfer-ence z Scores at6-14 Months 680 -0.74 690 1.8 700 -0.29 720 0.26 740 0.31 740 2.1 750 1.7 750 2.6 760 1.7 780 1.7 790 2.6 810 2.7 815 3.4 820 2.8 825 0.91 835 2.95 840 2.9 845 2.8 (a) What is the value of the correlation coefficient? (Give the answer to two decimal places.)r = (b) Find the equation of the least-squares line. (Give the answer to two decimal places.) = (c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.9. (Give the answer to two decimal places.)
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In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 12 adolescents with alcohol use disorders to 3 determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm°. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x= 8.13 cm° and s= 0.7 cm°. Conduct the appropriate test at the a= 0.01 level of significance. State the null and alternative hypotheses. Ho: H 9.02 H1:µ < 9.02 (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.)
In a certain article, laser therapy was discussed as a useful alternative to drugs in pain management of chronically ill patients. To measure pain threshold, a machine was used that delivered low-voltage direct current to different parts of the body (wrist, neck, and back). The machine measured current in milliamperes (mA). The pretreatment experimental group in the study had an average threshold of pain (pain was first detectable) at ? = 3.22 mA with standard deviation ? = 1.25 mA. Assume that the distribution of threshold pain, measured in milliamperes, is symmetric and more or less mound-shaped. (Round your answers to two decimal places.) (a) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 68% of the experimental group will have a threshold of painfrom mA to mA(b) Use the empirical rule to estimate a range of milliamperes centered about the mean in which about 95% of the experimental group will have a threshold of painfrom mA to…
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The accompanying data on x = head circumference z score (a comparison score with peers of the same age - a positive score suggests a larger size than for peers) at age 6 to 14 months and y = volume of cerebral grey matter (in ml) at age 2 to 5 years were read from a graph in an article. Cerebral GreyMatter (ml) 2-5 yr Head Circumfer-ence z Scores at6-14 Months 680 -0.73 690 1.2 700 -0.28 720 0.27 740 0.32 740 1.5 750 1.1 750 2.0 760 1.1 780 1.1 790 2.0 810 2.1 815 2.8 820 2.2 825 0.92 835 2.35 840 2.3 845 2.2 (a) What is the value of the correlation coefficient? (Give the answer to two decimal places.)r = (b) Find the equation of the least-squares line. (Give the answer to two decimal places.) y= (c) Predict the volume of cerebral grey matter for a child whose head circumference z score at age 12 months was 1.8. (Give the answer to two decimal places.)
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