Mathematics, 10.04.2020 20:28 miko96
Local government is worried that runoff from a corporate farm has caused water in a nearby stream to become acidic. The pH is used to measure the acidity/alkalinity of a substance. Pure water, for instance, has a pH of 7, and smaller pH values indicate acidity, while larger values indicate alkalinity. A contractor is hired to test the hypothesis that the water is significantly acidic.
H0: μ = 7
HA: μ < 7
The contractor took 27 water samples and found an average pH of 6.3 with a sample standard deviation of 1.86. What is the test statistic for this sample?
Give your answer to 2 decimal places. For help on how to input a numeric answer, please see "Instructions for inputting a numeric response."
Answers: 1
Mathematics, 21.06.2019 13:00, PONBallfordM89
An advertisement is on a flyer that has a thickness of 8.2 × 10-5 meters. each measurement below is the thickness of a stack of flyers. drag each measurement to the correct stack.
Answers: 2
Mathematics, 21.06.2019 19:20, maisieisdabomb23
What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9
Answers: 2
Mathematics, 21.06.2019 21:50, rubieceleste548
Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next
Answers: 1
Mathematics, 21.06.2019 23:30, paolaf3475
Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3
Answers: 1
Local government is worried that runoff from a corporate farm has caused water in a nearby stream to...
Chemistry, 16.04.2020 01:01