The monthly utility bills in a city are normally distributed with a mean of $100 and a standard deviation of $15 find the probability that a randomly out selected utility bill is less than $68 then find the probability between $86 and $120 and then find the probability of more than $150

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 mean of a normal probability distribution is 120 the standard deviation is 10. About what percent of the observations lie between 110 and 130

The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?

The average credit card debt for college seniors is$3262. If the debit is normally distributed with a standard deviation of$1100, find the probability that the senior owes more than $4000.

A flooring company sells carpet by the metre off of a standard sized roll. The mean amount of carpet sold per month is known to have a normal distribution. If the probability of selling more than 1,000 metres per month is 0.0668 and the standard deviation is 100 metres, what is the mean amount of carpet sold? 900 1100 1150 850 The amount of coffee poured into a large coffee cup at the campus Tim Horton's has a distribution that is skewed to the right with a mean of 600 ml and a standard deviation of 50 ml. For a random sample of 100 large cups poured, what is the mean of the sampling distribution? 50 600 100 50 √100

The probability that a person catches a cold during the cold and flu season Is 0.4. Assume that 10 people are chosen at random. What is the standard deviation for the number of people catching a cold?