he average number of cavities that 30-year-old Americans have had in their lifetimes is 7.0. The standard deviation 2.7 cavities. Do 20 year olds have more cavities? The data show the results of a survey of 16 twenty-year-olds who were asked how many cavities they have had. Assume that that distribution of the population is normal. 6, 7, 7, 8, 7, 8, 9, 6, 5, 6, 7, 8, 7, 6, 9, 8 What can be concluded at the 0.05 level of significance? H0: = 7 Ha: [ Select ] [">", "Not Equal To", "<"] 7 Test statistic:[ Select ] ["Z", "T"] p-Value = [ Select ] ["0.04", "0.43", "0.86", "0.02"] [ Select ] ["Reject Ho", "Fail to Reject Ho"] Conclusion: There is [ Select ] ["statistically insignificant", "statistically significant"] evidence to make the conclusion that the population mean number of cavities for 20-year-olds is more than 7.0. p-Value Interpretation: If the mean number of cavities for 20-year-olds is equal to [ Select ] ["5", "10", "7.1", "7"]and if another study was done with a new randomly selected group of 16 twenty-year-olds, then there is a [ Select ] ["4", "43", "86", "2"] percent chance that the mean number of cavities for this new sample would be more than [ Select ]["7.1", "8.3", "7", "5"] . Level of significance interpretation: If the mean number cavities for twenty-year-olds is equal to [ Select ] ["7.1", "5", "8.3", "7"] and if a new study was done with a new group of 16 randomly selected 20-year-olds then there would be a [ Select ] ["50", "10", "7", "5"]percent chance that this new study would result in the false conclusion that the mean number of cavities per person for 20-year-olds is more than 7.
The average number of cavities that 30-year-old Americans have had in their lifetimes is 7.0. The standard deviation 2.7 cavities. Do 20 year olds have more cavities? The data show the results of a survey of 16 twenty-year-olds who were asked how many cavities they have had. Assume that that distribution of the population is normal.
6, 7, 7, 8, 7, 8, 9, 6, 5, 6, 7, 8, 7, 6, 9, 8
What can be concluded at the 0.05 level of significance?
H0: = 7
Ha: [ Select ] [">", "Not Equal To", "<"] 7
Test statistic:[ Select ] ["Z", "T"]
p-Value = [ Select ] ["0.04", "0.43", "0.86", "0.02"]
[ Select ] ["Reject Ho", "Fail to Reject Ho"]
Conclusion: There is [ Select ] ["statistically insignificant", "statistically significant"] evidence to make the conclusion that the population
p-Value Interpretation: If the mean number of cavities for 20-year-olds is equal to [ Select ] ["5", "10", "7.1", "7"]and if another study was done with a new randomly selected group of 16 twenty-year-olds, then there is a [ Select ] ["4", "43", "86", "2"] percent chance that the mean number of cavities for this new sample would be more than [ Select ]["7.1", "8.3", "7", "5"] .
Level of significance interpretation: If the mean number cavities for twenty-year-olds is equal to [ Select ] ["7.1", "5", "8.3", "7"] and if a new study was done with a new group of 16 randomly selected 20-year-olds then there would be a [ Select ] ["50", "10", "7", "5"]percent chance that this new study would result in the false conclusion that the mean number of cavities per person for 20-year-olds is more than 7.
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