In the past, schools in Los Angeles County has closed an average of three days each year for weather emergencies
The mean daily rainfall in Los Angeles in December is 0.05 inches with a standard deviation of 0.02 inches. What is the probability that the total rainfall in Los Angeles for 35 randomly selected December days (possibly over several years) will exceed 2 inches? Carry your intermediate computations to at least four decimal places. Report your result to at least three decimal places.
Temperatures in LA. The average daily high temperature in October in Los Angeles is 79 degrees Fahrenheit with a standard deviation of 5 degrees Fahrenheit. Suppose that the temperatures in October closely follow a normal distribution. Round calculated answers to 3 decimal places. 1. What is the probability of observing an 78 degrees Fahrenheit temperature or higher in Los Angeles during a randomly chosen day in October? 2. How cold are the coldest 30% of the days during October in...
Your answer is incorrect. The mean daily rainfall in Los Angeles in December is 0.05 inches with a standard deviation of 0.02 inches. What is the BB probability that the total rainfall in Los Angeles for 35 randomly selected December days (possibly over several years) will exceed 2 inches? Carry your intermediate computations to at least four decimal places. Report your result to at least three decimal places.
2. The level of air pollutants in Los Angeles varies from day to day because of wind and weather. Overall though, some neighborhoods are very unhealthy. The level of PM2.5 (a type of small particles) in the Chinatown neighborhood of LA has an average of 160 μg/m3 (that’s micrograms per cubic meter). It varies day to day though, with a standard deviation of 22 μg/m3. This last month has been particularly bad: for the last 31 days, the average has...
On average Tempe, AZ gets rain 29 days a year (out of 365 days). Your weather app is predicting rain tomorrow. The app isn't perfect though. It only predicts that it will rain around 90% of the time that it actually does rain, and it will predict rain about 6% of the time that it doesn't rain. What is the probability it is going to rain tomorrow?
Los Angeles workers have an average commute of 33 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 13 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 32 minutes. c. Find the 75th percentile...
Los Angeles workers have an average commute of 31 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 15 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 37 minutes. c. Find the 85th percentile...
Los Angeles workers have an average commute of 32 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 13 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected LA worker has a commute that is longer than 29 minutes. c. Find the 90th percentile...
A 200 bed hospital recorded the following during the past whole year: Discharges 7,000 Average LOS 8.5 days Bed occupancy rate 82% How many times of the 200 hospital bed changed occupants? (hint) there are 2 ways to calculate the answers; direct and indirect formula.
Los Angeles workers have an average commute of 33 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 13 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-NG b. Find the probability that a randomly selected LA worker has a commute that is longer than 39 minutes. c. Find the 90th percentile for the...