Historically, 86.19% of packages delivered by UPS are on time. Suppose 142 deliveries are randomly selected...
Historically, 86.19% of packages delivered by UPS are on time. Suppose 142 deliveries are randomly selected for quality control. What is the probability that less than 88.11% of the deliveries were on time? Question 5 options: 1) 11.0594 2) 0.7464 3) 0.2536 4) 0.5000 5) >0.999
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Historically, 86.19% of packages delivered by UPS are on time.
Suppose 142 deliveries are randomly selected...
Suppose that out of 20% of all packages from Amazon are delivered by UPS, 12% of...
Suppose that out of 20% of all packages from Amazon are delivered by UPS, 12% of the packages that are delivered by UPS weighs 2 lbs or more. Also, 8% of the packages that are not delivered by UPS weighs less than 2 lbs. a. What is the probability that a package is delivered by UPS if it weighs 2 lbs or more? b. What is the probability that a package is not delivered by UPS if it weighs 2...
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package...
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package weights have a standard deviation of 5.3gm. The manufacturer believes that the average package weight is 100gm. Assuming the CLT applies and = 100, calculate the probability of obtaining a sample mean less than 98.5gm
A sample proportion is calculated from a sample size of 418. How large of a sample...
A sample proportion is calculated from a sample size of 418. How large of a sample would we need in order to decrease the standard error by a factor of 4? Question 3 options: 1) 12,958 2) 7,106 3) 836 4) 6,688 5) 1,672 Question 4 (1 point) Historically, 71.15% of packages delivered by UPS are on time. Suppose 121 deliveries are randomly selected for quality control. What is the probability that greater than 74.74% of the deliveries were on...
In a recent survey of 114 WMU graduates, 52 students said that parking was too limited...
In a recent survey of 114 WMU graduates, 52 students said that parking was too limited on campus. What is the estimate of the population proportion? What is the standard error of this estimate? Question 1 options: 1) Estimate of proportion: 0.456, Standard error: 0.0044. 2) Estimate of proportion: 0.456, Standard error: 0.0466. 3) Estimate of proportion: 0.544, Standard error: 0.0466. 4) The true population proportion is needed to calculate this. 5) Estimate of proportion: 0.544, Standard error: 0.0044. Question...
Suppose the distribution of Y = the amount of time it takes for a randomly selected...
Suppose the distribution of Y = the amount of time it takes for a randomly selected student to complete a particular exam is normal with mean 43.7 minutes and standard deviation 4.6 minutes. Suppose those students who go past a 50 minute time limit are tortured by Dr. Robinson’s singing until they complete the exam. a. Show that the probability of a randomly selected student avoiding any torture is .91459. (6 decimals) b. If 10 students take the exam, what...
A certain flight arrives on time 86 percent of the time. Suppose 154 flights are randomly...
A certain flight arrives on time 86 percent of the time. Suppose 154 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 135 flights are on time. (b) at least 135 flights are on time. (c) fewer than 142 flights are on time. (d) between 142 and 146, inclusive are on time. (a) P(135) = (Round to four decimal places as needed.) (b) P(X135) = (Round to four decimal places as...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 142 daysμ=142 days and standard deviation sigma equals 9 daysσ=9 days. Complete pa...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 142 daysμ=142 days and standard deviation sigma equals 9 daysσ=9 days. Complete parts (a) through (f) below. (a) What is the probability that a randomly selected pregnancy lasts less than 139139 days?The probability that a randomly selected pregnancy lasts less than 139139 days is approximately 0.36940.3694. (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and...
Let X be the number of packages being mailed by a randomly selected customer at a...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
Let X be the number of packages being mailed by a randomly selected customer at a...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
Let X be the number of packages being mailed by a randomly selected customer at a...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. * 1 p(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X 1 1. 5 2 3.5 PC) 04 125 x 16 X (b) Refer to part...
Suppose that out of 20% of all packages from Amazon are delivered by UPS, 12% of the packages that are delivered by UPS weighs 2 lbs or more. Also, 8% of the packages that are not delivered by UPS weighs less than 2 lbs. a. What is the probability that a package is delivered by UPS if it weighs 2 lbs or more? b. What is the probability that a package is not delivered by UPS if it weighs 2...
3. The average weight of 80 randomly selected potatoe chip packages is 98.5gm. Historically the package weights have a standard deviation of 5.3gm. The manufacturer believes that the average package weight is 100gm. Assuming the CLT applies and = 100, calculate the probability of obtaining a sample mean less than 98.5gm
A certain flight arrives on time 86 percent of the time. Suppose 154 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 135 flights are on time. (b) at least 135 flights are on time. (c) fewer than 142 flights are on time. (d) between 142 and 146, inclusive are on time. (a) P(135) = (Round to four decimal places as needed.) (b) P(X135) = (Round to four decimal places as...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. * 1 p(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X 1 1. 5 2 3.5 PC) 04 125 x 16 X (b) Refer to part...
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