I honestly just need help with the last two, D and E, thanks! A wastewater treat
ID: 3179695 • Letter: I
Question
I honestly just need help with the last two, D and E, thanks!
A wastewater treatment plant must monitor its discharge continuously in order to comply with Environmental Protection Agency (EPA) regulations. The EPA requires that the plant keep its discharge level below 1521 gallons per hour. On a randomly selected day, discharge rates were sampled at 6 different times. This data - rounded to the nearest integer - is reported in Table 1. Table 1: Wastewater discharge rates (gal/hr) 1525 1539 1523 1528 1539 1524 An EPA scientist would like to test to see if there is evidence that this plant's discharge rate is exceeding the limit of 1521 gallons/hour. Let = 0.05 The null and alternative hypotheses are: Ho: 1521; Ha: > 1521 A) The sample average wastewater discharge rate for this treatment plant is: 1529.67 Correct: Your answer is correct. gal/hr Note: round your answer to the nearest hundredth B) The sample standard deviation of the wastewater discharge rates for this treatment plant is: 7.42 Correct: Your answer is correct. Note: round your answer to the nearest hundredth C) The test statistic for this data set is: t-statistic = 2.86 Correct: Your answer is correct. Note: Round your answer to the nearest hundredth. D) The p-value for this study is: .0042 Incorrect: Your answer is incorrect. Note: express your answer to 4 decimal precision E) The statistical decision and corresponding English interpretation are: FTR Ho: we cannot conclude that waste water discharge rates are, on average, different than 1521 gal/hr. Reject Ho: conclude that waste water discharge rates are, on average, greater than 1521 gal/hr. Reject Ho: we can conclude that waste water discharge rates are, on average, different than 1521 gal/hr. However, we cannot say if the discharge rate is more or less than 1521 gal/hr FTR Ho: we can conclude that waste water discharge rates are, on average, different than 1521 gal/hr. FTR Ho: we cannot conclude that waste water discharge rates are, on average, more than 1521 gal/hr Reject Ho: we can conclude that waste water discharge rates are, on average, less than 1521 gal/hr FTR Ho: we can conclude that waste water discharge rates are, on average, less than 1521 gal/hr FTR H0: we cannot conclude that waste water discharge rates are, on average, less than 1521 gal/hr
Explanation / Answer
D) The P-Value is 0.0177
E) Reject Ho: conclude that waste water discharge rates are, on average, greater than 1521 gal/hr.