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I need help in the following exercises:For more information on the exercises see the photo6. Fidelity Growth & Income receives three-star, or neutral, mutual funds

I need help in the following exercises:For more information on the exercises see the photo6. Fidelity Growth & Income receives three-star, or neutral, mutual funds rated by Morningstar. Following are the quarterly percentage returns for the five-year period from 2001 to 2005 (Mornigstar Funds 500, 2006).A. Find the mean, variance, and standard deviation of these quarterly returns. B. Financial analysts often use the standard deviation as a measure of risk for stocks and mutual funds. Give a 95% confidence interval for the population standard deviation of the quarterly return of the Fidelity Growth mutual funds & income.14. In a sample of 16 elements from population 1 the sample variance is s? = 5.8 and in a sample of 21 elements of population 2 the sample variance is s2 = 2.4. Test the following hypotheses using 0.05 as the significance levela. Give the conclusion reached using the p-value method.b. Repeat the test using the critical value method.18. En 10 empresas de la industria area la desviacin estndar en las ganancias a 12 meses por accin fue 4.27 y en 7 empresas de la industria automotriz. la desviacin estndar en las ganancias a 12 meses por accin fue 2.27 (Business Week, 14 de agosto de 2000). Realice una prueba para varianzas iguales con a = 0.05. Cul es la conclusin acerca de la variabilidad de las ganancias por accin en la industria area y en la industria automotriz?22. Una hiptesis de investigacin sostiene que la varianza de las distancias de frenado de los automviles sobre pavimento hmedo es mayor que la varianza de las distancias de frenado de los automviles sobre pavimento seco. En un estudio a 16 automviles que iban a una misma velocidad se les hizo frenar sobre pavimento hmedo y despus sobre pavimento seco. En pavimento hmedo la desviacin estndar de las distancias de frenado fue 32 pies. Sobre pavimento seco la desviacin estndar es 16 pies.A. Con 0.05 como nivel de significancia, los datos muestrales justifican la conclusin de que en las distancias de frenado sobre pavimento hmedo la varianza es mayor que sobre pavimento seco? Cul es el valor-p?B. Qu significan las conclusiones estadsticas de este estudio en trminos de las recomendaciones para la seguridad al manejar?

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