Question

Assuming that the given mean and standard deviation have not changed, find the probability of randomly seleting 44 cigarettes with a mean of 8.904 mg or less.

Answer 1

To find the probability of randomly selecting 44 cigarettes with a mean of 8.904 mg or less, we need to calculate the z-score and look it up in the standard normal distribution table.

Step-by-step explanation:

To find the probability of randomly selecting 44 cigarettes with a mean of 8.904 mg or less, we need to calculate the z-score for this mean.

The formula for calculating the z-score is: z = (x - μ) / σ, where x is the mean, μ is the population mean, and σ is the population standard deviation.

Using the given information, we can plug in the values: z = (8.904 - μ) / σ

Once we have the z-score, we can look up the corresponding probability in the standard normal distribution table.