# Question

a. The manufacturer of aspirin claims that the proportion of headache sufferers who get relief with just two aspirins is 53%. What is the probability that in a random sample of 400 headache sufferers, less than 50% obtain relief? If 50% of the sample actually obtained relief, what does this suggest about the manufacturer’s claim?

b. Repeat part (a) using a sample of 1,000.

b. Repeat part (a) using a sample of 1,000.

## Answer to relevant Questions

The manager of a restaurant in a commercial building has determined that the proportion of customers who drink tea is 14%. What is the probability that in the next 100 customers at least 10% will be tea drinkers?The Red Lobster restaurant chain regularly surveys its customers. On the basis of these surveys, the management of the chain claims that 75% of its customers rate the food as excellent. A consumer testing service wants to ...Repeat Exercise 9.48 assuming that the means are 140 and 138, respectively.Population 1: µ = 40, σ = 6Population 2: µ = 38, σ = 8 Draw a sampling distribution of a biased estimator.Suppose that the amount of time teenagers spend weekly working at part-time jobs is normally distributed with a standard deviation of 40 minutes. A random sample of 15 teenagers was drawn, and each reported the amount of ...Post your question

0