Question 2 of 12 1 Point The soil acidity is measured by a quantity called pH, which may range from 0 to 14 for soils ranging from low to high acidity. Many soils have an average pH in the 5-8 range. A scientist wants to estimate the average ph for a large field from n randomly selected core samples by measuring the pH in each sample. If the scientist selects n samples, and that the sample mean of the pH measurements will be within 0.1 unit of the true average ph for the field, find n (number of samples) so that probability is at 0.90. Express answer in whole numbers