. When telephone subscribers call from the National Magazine Subscription Company, 18% of the people who...
. When telephone subscribers call from the National Magazine Subscription Company, 18% of the people who answer stay on the line for more than one minute. If 800 people are called in a day, find the probability that a. at least 150 stay on the line for more than one minute. (Use normal approximation to binomial). b. more than 200 stay on the line. (Use Normal approximation to Binomial).
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. When telephone subscribers call from the National Magazine
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A telephone call center where people place marketing calls to customers has a probability of success...
A telephone call center where people place marketing calls to customers has a probability of success of 0.06. Use the binomial distribution to find the exact values. What is the minimum number of marketing calls that need to be placed in order to ensure that there is a probability of approximately 0.90 of generating 5 or more new customers. 110 90 150 130 170 50
A telephone call center where people place marketing calls to customers has a probability of success...
A telephone call center where people place marketing calls to customers has a probability of success of 0.06. Use the binomial distribution to find the exact values. What is the probability that placing 50 marketing calls would result in generating at least 4 new customers? 0.8100 0.4162 0.5838 0.6473 0.8206 0.3527 0.1900 0.1794 What is the probability that placing 50 marketing calls would result in generating 2 or less new customers? 0.6473 0.3527 0.8100 0.4162 0.1900 0.8206 0.1794 0.5838 Question...
7. A search engine company claims that 15% of people who use its site click for...
7. A search engine company claims that 15% of people who use its site click for more information about its advertisers’ products. Assuming that claim is true, (a) what is the probability that at least one out of the next 10 people who use the site will click for more information? (b) Estimate, using the normal distribution, the probability that at least 10 out of the next 100 people who use the site will click for more information. (c) Write...
In a survey of 300 people, approximately 15% of the people identified themselves as being left-handed....
In a survey of 300 people, approximately 15% of the people identified themselves as being left-handed. What are the mean, standard deviation, and shape of the distribution of thesample proportion p-hat of respondents who say they are left-handed? (3 points) Using the normal approximation without the continuity correction, sketch theprobability distribution curve for the distribution of p-hat. Shade equal areas onboth sides of the mean to show an area that represents a probability of .95,and label the upper and lower...
In a survey of 300 people, approximately 15% of the people identified themselves as being left-handed....
In a survey of 300 people, approximately 15% of the people identified themselves as being left-handed. What are the mean, standard deviation, and shape of the distribution of thesample proportion p-hat of respondents who say they are left-handed? (3 points) Using the normal approximation without the continuity correction, sketch theprobability distribution curve for the distribution of p-hat. Shade equal areas onboth sides of the mean to show an area that represents a probability of .95,and label the upper and lower...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. Do you take the free samples offered in supermarkets? About 63% of all customers will take free samples. Furthermore, of those who take the free samples, about 32% will buy what they have sampled. Suppose you set up a counter in a supermarket offering free samples of a new product. The...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities Do you take the free samples offered in supermarkets? About 63% of all customers will take free samples. Furthermore, of those who take the free samples, about 32% will buy what they have sampled. Suppose you set up a counter in a supermarket offering free samples of a new product. The...
A recent study has shown that 28% of 18-34 year olds check their Facebook/Instagram feeds before getting out of bed in t...
A recent study has shown that 28% of 18-34 year olds check their Facebook/Instagram feeds before getting out of bed in the morning, If we sampled a group of 150 18-34 year olds, what is the probability that the number of them who checked their social media before getting out of bed is: a.) At least 34? b.) No more than 50? c.) between 40 and 44 (including 40 and 44)? Use the Normal Approximation to the Binomial distribution to...
please answer these questions 2. Because many passengers who make reservations do not show up, airlines...
please answer these questions
2. Because many passengers who make reservations do not show up, airlines often overbook flights (sell more tickets than there are seats). A Boeing 767-400ER holds 245 passengers. The airline believes the rate of passenger not showing up is 5% and sells 255 tickets. [10 Marks] a. Use Normal approximation to determine the binomial probability of at least 246 passengers showing up. [9 Marks] b. Should the airline change the number of tickets it sells for...
1. Suppose that random variables X and Y are independent and have the following properties: E(X)...
1. Suppose that random variables X and Y are independent and have the following properties: E(X) = 5, Var(X) = 2, E(Y ) = −2, E(Y 2) = 7. Compute the following. (a) E(X + Y ). (b) Var(2X − 3Y ) (c) E(X2 + 5) (d) The standard deviation of Y . 2. Consider the following data set: �x = {90, 88, 93, 87, 85, 95, 92} (a) Compute x¯. (b) Compute the standard deviation of this set. 3....
A telephone call center where people place marketing calls to customers has a probability of success of 0.06. Use the binomial distribution to find the exact values. What is the minimum number of marketing calls that need to be placed in order to ensure that there is a probability of approximately 0.90 of generating 5 or more new customers. 110 90 150 130 170 50
A telephone call center where people place marketing calls to customers has a probability of success of 0.06. Use the binomial distribution to find the exact values. What is the probability that placing 50 marketing calls would result in generating at least 4 new customers? 0.8100 0.4162 0.5838 0.6473 0.8206 0.3527 0.1900 0.1794 What is the probability that placing 50 marketing calls would result in generating 2 or less new customers? 0.6473 0.3527 0.8100 0.4162 0.1900 0.8206 0.1794 0.5838 Question...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. Do you take the free samples offered in supermarkets? About 63% of all customers will take free samples. Furthermore, of those who take the free samples, about 32% will buy what they have sampled. Suppose you set up a counter in a supermarket offering free samples of a new product. The...
Tutorial Exercise In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities Do you take the free samples offered in supermarkets? About 63% of all customers will take free samples. Furthermore, of those who take the free samples, about 32% will buy what they have sampled. Suppose you set up a counter in a supermarket offering free samples of a new product. The...
please answer these questions
2. Because many passengers who make reservations do not show up, airlines often overbook flights (sell more tickets than there are seats). A Boeing 767-400ER holds 245 passengers. The airline believes the rate of passenger not showing up is 5% and sells 255 tickets. [10 Marks] a. Use Normal approximation to determine the binomial probability of at least 246 passengers showing up. [9 Marks] b. Should the airline change the number of tickets it sells for...
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