The correlation indicates that the more the vegetables that are eaten, the lower the blood pressure. However, this is not the only factor related to high blood pressure so the conclusion is not valid.
Answer: D Step-by-step explanation:
Answer:
(a) According to the central limit theorem, the distributions of the sample means of sufficiently large samples randomly selected from a population with mean, μ and standard deviation, σ with replacement will be normally distributed
Therefore, given that the size of the population from which the samples were selected (34 petri dishes) is comparable the sizes of the samples, (16 and 18), therefore, the samples are approximately normal
Also given that the petri dishes were prepared with growth medium designed to increase the growth of microorganisms, with an expected amount of growth, the samples therefore came from approximately normal distributions
Step-by-step explanation:
7x²(6x + 3x² - 4)
7x² × 6x = 42x³
7x² × 3x² = 21x⁴
7x² × -4 = -28x²
42x³ + 21x⁴ - 28x² is the correct answer.