practice question #4. A study was done in Europe on the average age of a child for their first dental visit. In a sample of 43 children, it was found that the average age of a child at the first dental visit was 24.4 months with sample standard deviation 7.2 months. a. Find the 95% confidence interval for the mean age of a child at their first dental visit in Europe. Also verify that the sample size was appropriate for this method. In your work, write out the formula you are using. Round final answers to 1 decimal place. Address appropriateness of size: Confidence Interval = _____________________________ b. State your results in context of the problem. Use precise language. c. True or False: You can say there is a 95% chance that a child’s mean age at their first dental visit lies between these two numbers. d. True or False: If you calculated a 90% confidence interval, it would be wider than your answer above. (You do not have to calculate it).
practice question #4. A study was done in Europe on the average age of a child for their first dental visit. In a sample of 43 children, it was found that the average age of a child at the first dental visit was 24.4 months with sample standard deviation 7.2 months.
a. Find the 95% confidence interval for the
b. State your results in context of the problem. Use precise language.
c. True or False: You can say there is a 95% chance that a child’s mean age at their first dental visit lies between these two numbers.
d. True or False: If you calculated a 90% confidence interval, it would be wider than your answer above. (You do not have to calculate it).
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