Each year 7% of the world tiger population is killed by poachers. Now that there is a campaign to educate people on the problem, has this percent increased? 200 tigers were observed and 22 were killed by poachers. For your hypothesis test, assume the distribution of tigers in the wild is normally distributed and use a significance level of 0.05. What is the probability of Z obr?

Suppose the tires on your car have an average life expectancy of 60,000 miles, with a standard deviation of 10,000. When should you change your tires if you want a 95% probability of not having a blow-out while driving.   40,000 miles   38,000 miles   57,000 miles   None of the above

We are examining farmer production in marginal land. A sample of 100 farmers produce this crop with mean of 100 bushels per acre. Assume a normal distribution. Q1: What is the probability an individual farmer in this population produces 103 or less bushels of corn?Q2: What is the probability the mean bushels of corn produced is 103 or less bushels of corn?

Women's shoe sizes are (approximately) normally distributed, with an average size of 8.076 and a standard deviation of 1.468. You work at Vogue Magazine, and would like to interview some women about how shoes fit. You take a random sample of 10 women. What is the probability that the 10 women you sampled had an average shoe size that is less than 8?

Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?

The MPG (miles per gallon) for a certain compact car is normally distributed with a mean of 30 and a standard deviation of 1. What is the probability that the MPG for a randomly selected compact car would be less than 28?

Women's shoe sizes are (approximately) normally distributed, with an average size of 8.076 and a standard deviation of 1.468. You work at Vogue Magazine, and would like to interview some women about how shoes fit. You take a random sample of 10 women. What is the probability that the 10 women you sampled had an average shoe size that is greater than 8.5?