Question

question 3 (2 points)
which of the following patterns of dispersal will result in a more accurate number when using random sampling?

• clumped
• random
• even
• scattered

question 4 (2 points)
a house fly weighs approximately 15 mg. how much does it weigh in grams?

• 0.15 g
• .15 g
• 1.5 g
• 150 g

Explanation:

Question 3

To determine which dispersion pattern gives a more accurate random sampling result, we analyze each:

• Clumped: Organisms are grouped, so sampling may over/underrepresent groups.
• Random: Individuals are randomly distributed, reducing bias in sampling as each area has an equal chance of being sampled, leading to more accurate estimates.
• Even (Uniform): Organisms are evenly spaced, but random sampling of uniform dispersion can still have variability, and random dispersion is more natural for reducing sampling bias.
• Shattered is not a standard dispersion term; the main patterns are clumped, random, uniform. So random dispersion is best for accurate random sampling.

Step1: Recall unit conversion

We know that \( 1 \text{ gram} = 1000 \text{ milligrams} \), so to convert milligrams to grams, we use the formula \( \text{grams} = \frac{\text{milligrams}}{1000} \).

Step2: Apply conversion to 15 mg

Substitute \( \text{milligrams} = 15 \) into the formula: \( \text{grams} = \frac{15}{1000} = 0.015 \)? Wait, no—wait, 15 mg to grams: \( 15 \div 1000 = 0.015 \)? Wait, but the options have 0.15 g, 0.015? Wait, maybe a typo? Wait, 15 mg: \( 15 \text{ mg} = 15 \times 10^{-3} \text{ g} = 0.015 \text{ g} \)? But the options have 0.15 g (maybe a typo, or maybe I misread). Wait, no—wait, 15 mg: 1 mg = 0.001 g, so 15 mg = 15 0.001 g = 0.015 g. But the first option is 0.15 g (maybe a typo, or maybe the question has 150 mg? Wait, no, the question says 15 mg. Wait, maybe the options are mislabeled. Wait, if it's 150 mg, then 150 mg = 0.15 g. But the question says 15 mg. Wait, perhaps a mistake in the question. But assuming the question is 15 mg, the correct conversion is 0.015 g, but since the options have 0.15 g (maybe a typo, like 150 mg), let's check: 150 mg = 0.15 g. But the question says 15 mg. Alternatively, maybe I made a mistake. Wait, 1 gram = 1000 milligrams, so 1 mg = 0.001 g. So 15 mg = 15 0.001 = 0.015 g. But the options have 0.15 g (which would be 150 mg). So if we assume the question has a typo and it's 150 mg, then 150 mg = 0.15 g. But as per the question, 15 mg: the correct answer should be 0.015 g, but since that's not an option, maybe the question meant 150 mg. So the answer would be 0.15 g (option B, assuming options are A. 0.15 g, B. 0.15 g? Wait, the options are: 0.15 g, .15 g (same as 0.15 g), 1.5 g, 150 g. Wait, 15 mg is 0.015 g, but if the question is 150 mg, then 150 mg = 0.15 g. So perhaps the question has a typo, and the correct answer is 0.15 g (option A or B, depending on labeling). Let's proceed with the conversion:

\( 15 \text{ mg} = 15 \times 10^{-3} \text{ g} = 0.015 \text{ g} \), but since that's not an option, maybe the question intended 150 mg. So \( 150 \text{ mg} = 0.15 \text{ g} \). So the answer is 0.15 g (the second option, or first, depending on labeling).

Answer:

B. random (assuming options are labeled as A. clumped, B. random, C. even, D. shattered)

Question 4