Using Excel code to complete:
Question 4: The number of lawsuits filed over a 160-day period in Athens is displayed in the following table:
Number of Lawsuits per day Number of Days
Using Excel code to complete: Question 4: The number of lawsuits filed over a 160-day period...
Question 22 4 pts The number of patients admitted per day to a large hospital's ICU follows a skewed right distribution with a mean of 20 and a standard deviation of 8. Suppose a sample of 100 days was collected over the past year and the average number of patients admitted per day was calculated. Does the Central Limit Theorem apply to this problem? No Yes, since np and nq are both at least 15 Yes, since n is at...
. A data scientist tracks the number of songs that are downloaded from a particular website over the course of a year. She uses the data to build a probability distribution where the random variable X represents the number of songs downloaded per person each day. The distribution is given below. Find the mean and the standard deviation of the probability distribution using Excel. Enter the mean and round the standard deviation to three decimal places. A data scientist tracks...
Question 6 3 pts The number of violent crimes committed in a day possesses a distribution with a mean of 3.5 crimes per day and a standard deviation of 4 crimes per day. A random sample of 100 days was observed, and the mean number of crimes for the sample was calculated. Describe the sampling distribution of the sample mean. shape unknown with mean = 3.5 and standard deviation = 0.4 shape unknown with mean = 3.5 and standard deviation-4...
Binomial Events Past records over a long period of time show that 10.0% of the screws manufactured by a particular machine are defective. Given that a random sample of 10 screws are selected, complete the following tasks. a). Calculate the mean. b). Calculate the variance and standard deviation. c). Calculate the probability of 0 to 10 screws being defective [i.e. P(X=0), P(X=1), P(X=2)... P(X=n)]. d). Construct a histogram of the probability of faulty screws versus the number of faulty screws....
Suppose that over a certain period, the percent change in the daily adjusted close of the S&P500 can be approximately modeled as a normal random variable with mean 0.04% and standard deviation 0.92%. a) What is the probability that on a randomly selected day the change is between -1.3% and +1.7%? b) On how many of 100 randomly selected days in this period would a change above +2.0% would be expected? c) What is the 85th percentile of this variable?...
How do I do this in Excel? Business has about 20 customers a day with standard deviation of 6 customers. Assume normal distribution. In an attempt to increase the number of customers, manger offers a $2 discount on 10 consecutive weekdays. Reports strategy works since sample mean of customers during the 10 days period jumps to 25. a. What is the probability of getting a sample average of 25 or more even if the manager does not offer the discount?...
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the results shown in the table below. Complete (a) through (c) to the right. a. Compute the expected number of arrivals per minute. b. Compute the standard deviation. c. What is the probability that there will be fewer than 2 arrivals in a given minute?
Lost-time accidents occur in a company at a mean rate of 0.80.8 per day. What is the probability that the number of lost-time accidents occurring over a period of 99 days will be no more than 44? Round your answer to four 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...
A walk-in clinic for emergency room services maintains records of the number of patients it treats per day. The following table shows the frequency of the patient arrivals over the course of a 149149-day period. a. Calculate the approximate average number of patients per day. b. Calculate the approximate variance and standard deviation of the number of patients per day. Number of Patients per Day Frequency 20 to under 40 1919 40 to under 60 1717 60 to under 80...