Can anyone explain how to do this problem.
Can anyone explain how to do this problem. (2, 1) 1. A particular population is normally...
1) What is the probability of a randomly selected value from a normally distributed population falling within 1.5 standard deviations of the mean? 8) What is the probability of a randomly selected value from a normally distributed population NOT being between 0.68 standard deviations below the mean and 1.5 standard deviations above the mean? ***For the following questions, assume a business has an average daily revenue of $1200 and revenue levels are found to be normally distributed with a standard...
approximately 95% of all values of a normally distributed population lie within how many standard deviations of the population mean
1. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.6 days and a standard deviation of 1.8 days. Q: What is the probability of spending more than 2 days in recovery? 2. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.5 days and a standard deviation of 2.2 days. Q: What is the 70th percentile for recovery times? 3. A telephone poll of 1000...
Can anyone help? Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.2 hours. With this information, answer the following questions. (a) What proportion of light bulbs will last more than 62 hours? (b) What proportion of light bulbs will last 50 hours or less? (c) What proportion of light bulbs will last between 59 and 62 hours? (d) What is the probability that a...
Problem #6: The grade point averages (GPAs) of a large population of college students are approximately normally distributed with mean 2.5 and standard deviation 0.80. (a) What proportion of the students will possess a GPA greater than 3.0? (b) Suppose that 10 students are randomly selected from the student body. What is the probability that atmost 4 among 10 will possess a GPA greater than 3.0? (c) What would be the maximum GPA so that only 10% of the students...
How do I get this answer in excel? 2. A normally distributed population with 200 elements has a mean of 60 and a standard deviation of 10. The probability that the mean of a sample of 25 elements taken from this population would be smaller than 56 is a. 0.0166 5 0.0228 c. 0.3708 d. 0.0394
Question 2 2 marks A population is normally distributed with an unknown mean μ and unknown standard deviation σ. You collect a random sample of 24 measurements with sample mean7-55.9 and standard deviation-7.53. Use this information to answer the questions below (a) [0.5 mark] What is your 95% confidence İnterval for the population mean μ? (b) [1 mark] what is your best estimate for the population standard deviation σ? (c) [0.5 mark] If a fellow enginer tells you that the...
Can someone explain on how to do 2 and 3 please thank you. would reject the claim. an effective way to treat Covid-19. 2. You wish to estimate, with 95% confidence, the mean time it takes to pet all of the cats at the animal shelter. You observe 13 random people and find that the average amount of time it took to pet the cats was 23 minutes with a standard deviation of 24 minutes. Assume the population is normally...
1. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.9 days and a standard deviation of 2.1 days. What is the probability of spending more than 2 days in recovery? (Round your answer to four decimal places.) 2. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.8 days and a standard deviation of 2.4 days. What is the 90th percentile for recovery times? (Round...
1. Let a population be normally distributed with mean u and standard deviation o = 5. Find the sample size n such that we are 95 percent confident that the estimate of X is within 1.5 units of the true mean pi.