In a certain population of mussels (mytilus edu- lis), 80% of the individuals are infected with an intestinal parasite.13 a marine biologist plans to examine 100 ran- domly chosen mussels from the population. find the probability that 85% or more of the sampled mussels will be infected, using the normal approximation without the continuity correction.

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?