13. Solve the problem. The probability is 0.2 that a person shopping at a certain store...
solve 1. analyzing graphically: The probability that a person living in a certain city has a dog is estimated at 0.3. Find the probability that the tenth person interviewed at random in this city is the fifth person who has a dog.
i need help thank you
1. A shopping mall estimates the probability distribution of the number of stores mall customers actually enter, as shown in the table x 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.07 0.12 0.15 0.2 0.13 0.11 0.1 0.07 a. Find the mean and standard deviation of the number of stores entered. (10%) b. Refer to Question a Suppose that, on average, customers spend 10 in each store they enter. Find the...
A study of the time spent shopping in a supermarket for 20 specific items showed an approximately uniform distribution between 10 minutes and 20 minutes. a. What is the probability that the shopping time will be between 13 and 17 minutes? b. What is the probability that the shopping time will be less than 16 minutes? c. What are the mean and standard deviation of the shopping time? . a. The probability that the shopping time will be between 13...
Solve the problem. Annual precipitation in a certain city is normally distributed with a mean of 99 inches, and a standard deviation of 18 in. Find the probability that the mean annual precipitation during 35 randomly picked years will be less than 101.8 in.? Group of answer choices 0.8212 0.3212 0.9203 0.6788 0.1788
Problem 7 Customers shopping at Sprouts Store are both from east and west of Norman. The ones from the east of Norman arrive at the rate of 5 per minute. The ones from the west of Norman arrive at the rate of 7 per minute. Arrivals are random. Determine the probability that the interarrival time for all customers is less than 5 seconds?
normal probability distribution
. Provide an appropriate response. (1 point) Samples of size n 15 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the standard deviation is found for each sample. What is the distribution of the sample standard deviations? O normal (approximately) O skewed to the right O skewed to the left O not enough information provided 15. Provide an appropriate response. point) Samples of size n 90 are randomly...
Question 1. A vaccine has a 13% probability of failing to prevent a certain disease. The probability of getting the disease if a person is not vaccinated is 30%. In a certain geographic region, 25% of the people get vaccinated. (4-2 187-31 6ed) a. Draw a tree diagram that represents the experiment above and show the probability in each of the branches and the probability of the final outcomes. b. If a person is selected at random in this region,...
need answers!!!
i Find the indicated probability by using the complementation rule. 13) The age distribution of students at a community college ls Ewer 13) Under 21 21-24 25-28 29-32 33-36 37-40 Over 40 144 102 85 1457 A student from the community college is selected at random. Find the student is under probability that the 37 years old. Give your answer as a decimal rounded to three decimal places A) 0.070 B) 0.034 C) 0.092 D) 0.908 Find the...
16. The probability of winning on a slot machine is 800 If a person plays the machine 300 times, find the probability of winning at most 20 times. 17. The mean score on a dexterity test for 12-year-olds is 30. The standard deviation is 5. If a psychologist administers the test to a class of 22 students, find the probability that the mean of the sample will be between 27 and 31. Assume the variable is normally distributed. 18 The...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean H 141 days and standard deviation a (a) What is the probability that a randomly selected pregnancy lasts less than 137 days? The probability that a randomly selected pregnancy lasts less than 137 days is approximately (Round to four decimal places as needed) Interpret this probability. Select the correct choice below and fill in the answer box within your choice (Round to the nearest...