Recent data from a sample of 100 patients shows that on average it takes about 6 ± 2 months to see a dermatologist in BC. Suppose we want to construct a new CI with margin of error 1 month. Then we need to: 

In 2007, the ALOS (Average Length of Stay) in the US was 5.5 days. This means that about 50% of inpatient hospital stays in the US in 2007 lasted less than 5.5 days.

When one changes the significance level of a hypothesis test from 0.01 to 0.05, which of the following will happen? 

Wait times to see a doctor in walk-in clinics follow a bell shape distribution with a mean of 40 minutes and a standard deviation of 10 minutes. In a sample of 100 patients, about how many would have to wait at least 50 minutes?

The weight of women in a certain population is normally distributed with men 68 kg and standard deviation 7 kg. Complete the following:

If a randomly selected woman has a weight of 55, then her z-score is:

The proportion of people in Canada with more than one citizenship is about 11%.

In a simple random sample of 100,000 Canadians, what is the expected number of people with only one citizenship?

The height of an adult man is normally distributed with mean 170 cm and sd 10 cm.

It is more likely to find a 25 men whose average height is less than 170cm vs finding 25 men whose average height is greater than 180cm.