The Pringles manufacturer wants the margin of error for the mean weight of cans to be within 0.5 ounces. For a confidence interval of 95% and a standard deviation of 1.5, what sample size (whole number) is required?

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