Wildone@heart
New member
Sorry the question is in capitals please help me.
Suppose you want to determine if the lead concentrations in drinking water do not exceed the public health standard of 5 ppb (parts per billion). Based on 10 water samples you estimate the sample mean lead concentration to be, x= 1.17, and the sample standard deviation to be, s = 0. 36. Test the null hypothesis that the average lead level in the water samples does not exceed the public health standard. Start by clearly specifying your null and alternative hypotheses explicitly in terms of the under laying population mean of lead concentration in drinking water. Should this be a one or two tailed test?
Suppose you want to determine if the lead concentrations in drinking water do not exceed the public health standard of 5 ppb (parts per billion). Based on 10 water samples you estimate the sample mean lead concentration to be, x= 1.17, and the sample standard deviation to be, s = 0. 36. Test the null hypothesis that the average lead level in the water samples does not exceed the public health standard. Start by clearly specifying your null and alternative hypotheses explicitly in terms of the under laying population mean of lead concentration in drinking water. Should this be a one or two tailed test?