In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible forlong-term memory storage, in adolescents. The researchers randomly selected 19 adolescents with alcohol use disorders todetermine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm³. Ananalysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x = 8.04 cm³ ands=0.8 cm³. Conduct the appropriate test at the x = 0.01 level of significance.1. M.VE(Type integers or decimals. Do not round.)Identify the t-statistic.to=(Round to two decimal places as needed.)

Given data The researchers randomly selected 19 adolescentsThe alcoholic adoloscents were less than…

Answered: In a study, researchers wanted to…

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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Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on arganisms, an expert claimed that the amount of gamma radiation needed to sterilize a colany of tardigrades no longer has a mean of 1200 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy.) A study was conducted on a sample of 21 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean af 1225 Gy, with a sample standard deviation of 65 Gy. Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.10 level af significance, to support the claim that H, the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is nat equal to 1200 Gy. (a) State the null hypothesis and the…
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 13 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm3. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x = 8.01 cm and s = 0.8 cm³. Conduct the appropriate test at the a = 0.01 level of significance. State the null and alternative hypotheses. Ho: H H:H (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) %3D Identify the P-value. P-value =(Round to three decimal places as needed.) Make a conclusion regarding the hypothesis. V the null hypothesis. There V sufficient evidence to claim that the mean hippocampal volume is cm3.
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 11 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm ³. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x=8.09 cm³ and s= 0.8 cm³. Conduct the appropriate test at the a=0.01 level of significance. State the null and alternative hypotheses. Ho H₁: (Type integers or decimals. Do not round.)
A 1-1 matched case-control study was conducted among office workers on the association between suffering chronic lower back pain and sitting at a PC. There were 118 cases (suffering from back pain), individually matched to controls (not suffering from back pain) on sex, age, and general exercise habits. The exposure was the amount of time spent at a PC. The data are in Table 1: Case > 4 hours/day 4 hours/day 18 13 <4 hours/day 25 62 Use a suitable test to test for no association between suffering chronic lower back pain and time spent sitting at a PC.
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 26 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 8.87 cm³. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x = 8.09 cm³ and s= 0.8 cm³. Conduct the appropriate test at the α = 0.10 level of significance. Click the icon to view the table of critical t-values. State the null and alternative hypotheses. Ho: μ 8.87 cm³ 3 Η: μ < 8.87 cm cm³ (Type integers or decimals. Do not round.) Identify the t-statistic. to = 4.97 (Round to two decimal places as needed.) Approximate the P-value. = The P-value is in the range P-value <0.01. Make a conclusion regarding the hypothesis. the null hypothesis. There (Type an integer or a…
4. 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 21 adolescents with alcohol use disorders to 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 = 8.14 cm ands = 0.8 cm³. Conduct the appropriate test at the a = 0.01 level of significance. State the null and alternative hypotheses. Ho: H (1) H1: µ (2) (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) Make a conclusion regarding the hypothesis. (3) the null hypothesis. There (4) sufficient evidence to claim that the mean hippocampal volume is (5) cm³. 3
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 26 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.19 cm³. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x = 8.46 cm³ and s=0.8 cm³. Conduct the appropriate test at the a=0.05 level of significance. Click the icon to view the table of critical t-values. State the null and alternative hypotheses. Ho H cm` H₁ ▼ cm³ (Type integers or decimals. Do not round.) Identify the t-statistic. to= (Round to two decimal places as needed.) Approximate the P-value. The P-value is in the range Make a conclusion regarding the hypothesis. the null hypothesis. There (Type an integer or a decimal. Do not round.) 8:4 sufficient evidence…
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 15 adolescents with alcohol use disorders to 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= 8.01 cm and s= 0.7 cm. Conduct the appropriate test at the a = 0.01 level of significance. ..... State the null and alternative hypotheses. Họ: H H1: u (Type integers or decimals. Do not round.)
The Wall Street Journal asked Concur Technologies, Inc., an expense management company, to examine data from 8.3 million expense reports to provide insights regarding business travel expenses. Their analysis of the data showed that New York was the most expensive city. The following table shows the average daily hotel room rate (X) and the average amount spent on entertainment (Y) for a random sample of 9 of the 25 most-visited U.S. cities. These data lead to the estimated regression equation y = 17.49 + 1.0334x. For these data SSE = 1541.4. Use Table 1 of Appendix B. a. Predict the amount spent on entertainment for a particular city that has a daily room rate of $89 (to 2 decimals). b. Develop a 95% confidence interval for the mean amount spent on entertainment for all cities that have a daily room rate of $89 (to 2 decimals). c. The average room rate in Chicago is $128. Develop a 95% prediction interval for the amount spent on entertainment in Chicago (to 2 decimals).

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