7.6 Which or the following results has the higher t value for a test of the null

Question

7.6 Which or the following results has the higher t value for a test of the null hypothesis that the average US passenger car gels 30 miles per gallon? Do not do any calculations; just explain your reasoning. a. x 31.52., s = 8.33, n = 30 b. x = 31.52, s = 8.33, n = 50 Exercise 6.30 shows 50 body temperature readings for healthy persons using modern thermometers. Use these data to calculate die two-sided P value for a test of the null hypothesis that the population mean is 98.6 degree Fahrenheit. Which of the following assumptions were used In calculating the PS blur in the preceding exercise? a. temperatures, for healthy adults are normally distributed. b. These for observations are a random sample. c. The mean temperature for unhealthy adults is higher than the mean temperature for healthy adults. d. On average. healthy adults have a temperature of 98.6 Fahrenheit.

Explanation / Answer

7.5) Option B is correct because for higher t-value by the formula is t=(x-bar-mu)/(s/sqrt(n))

7.6) data set is not given

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