# Question: An entomologist is studying the effect of a chemical sex

An entomologist is studying the effect of a chemical sex attractant (pheromone) on insects. Several insects are released at a site equidistant from the pheromone under study and a control substance. If the pheromone has an effect, more insects will travel toward it rather than toward the control. Otherwise, the insects are equally likely to travel in either direction. Suppose the pheromone under study has no effect, so that it is equally likely that an insect will move toward the pheromone or toward the control. Suppose five insects are released.

a. List or count the number of different ways the insects can travel.

b. What is the chance that all five travel toward the pheromone?

c. What is the chance that exactly four travel toward the pheromone?

d. What inference would you make if the event in part c actually occurs? Explain.

a. List or count the number of different ways the insects can travel.

b. What is the chance that all five travel toward the pheromone?

c. What is the chance that exactly four travel toward the pheromone?

d. What inference would you make if the event in part c actually occurs? Explain.

## Answer to relevant Questions

In professional sports, stacking is a term used to describe the practice of African-American players being excluded from certain positions because of race. To illustrate the stacking phenomenon, the Sociology of Sport ...A clinical psychologist is given tapes of 20 subjects discussing their recent dreams. The psychologist is told that 10 are high anxiety individuals and 10 are low-anxiety individuals. The psychologist's task is to select ...Consider the discrete probability distribution shown here: a. Calculate μ, σ2, and σ. b. What is P(x < 15)? c. Calculate μ ± 2σ. d. What is the probability that x is in the interval μ ± 2σ? “Hot spots” are species-rich geographical areas. A Nature (Sept. 1993) study estimated the probability of a bird species in Great Britain inhabiting a butterfly hot spot at .70. Consider a random sample of 4 British ...Explain why each of the following is or is not a valid probability distribution for a discrete random variable x: a. b. c. d.Post your question