12.0.35/0.69 points| Previous Answers MintroStat9 7.E.073. My Notes Ask Your Tea

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12.0.35/0.69 points| Previous Answers MintroStat9 7.E.073. My Notes Ask Your Teacher A recent study of food portion sizes reported that over a 17-year period, the average size of a soft drink consumed by Americans aged 2 years and older increased from 13.1 ounces (oz) to 19.9 oz. The authors state that the difference is statistically significant with 0.01, t Explain what additional information you would need to compute a confidence interval for the increase, and outline the procedure that you would use for the computations. (Select all that apply.) Standard deviations and degrees of freedom could be used to find the confidence interval. In this case we could now find the P-value, which could be used to find SED t and degrees of freedom could be used to find the confidence interval. In this case we could compute SEo and use degrees of freedom to find t* Sample sizes and standard deviations could be used to find the confidence interval. In this case we could find the interval in the usual way Sample sizes and a more accurate P-value could be used to find the confidence interval. In this case we could determine standard deviations and the confidence interval in the usual way Degrees of freedom and a more accurate P-value could be used to find the confidence interval. In this case we could determine t, then calculate SEo and t Do think that a confidence interval would useful additional information? Explain why or why not. O Yes, the confidence interval could give us useful information about the magnitude of the difference. Yes, the confidence interval could give us useful information about the variability between sample participants in the study O No, the confidence interval could give us no more useful information because the P-value already tells us that the interval does not contain 0 No, the confidence interval could give us no more useful information because it cannot tell us the sample size in the study O Yes, the confidence interval could give us useful information about the average size of soft drinks eBook Submit Answer | Save Progress

Explanation / Answer

a) t and degrees of freedom could be used to find the CI. In this case we compute SED and use degrees of freedom to find t*.

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