Mathematics, 14.04.2020 20:52, bryannnnv
According to the Public Health Service (PHS), the optimal concentration of fluoride in public water supplies is 0.70 mg/L. Suppose that Alicia is an environmental scientist who is testing the quality of tap water a small city, and she believes that officials are adding too much fluoride to the water supply. Alicia tests the water from 60 randomly selected residences and finds that the mean fluoride concentration is 0.79 mg/L, with a standard deviation of 0.36 mg/L. Her data look normally distributed, so she decides to perform a t -test t-test to determine if the mean fluoride level is significantly higher than the PHS recommendation. She chooses a significance level of 0.01. Alicia calculates the one-sample t -statistic t-statistic to be 1.94, which results in a P -value P-value of 0.03. What should Alicia conclude based on her t -test t-test result
Answers: 2
Mathematics, 21.06.2019 13:30, pstat
What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians? discuss your hypothesis in terms of the processes that could lead to the current ecologies and distributions of metatherians and eutherians.
Answers: 2
Mathematics, 21.06.2019 20:30, yfgkeyonna
On a cm grid, point p has coordinates (3,-1) and point q has coordinates (-5,6) calculate the shortest distance between p and q give your answer to 1 decimal place
Answers: 2
According to the Public Health Service (PHS), the optimal concentration of fluoride in public water...