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The standard deviation is 10 minutes in a course that takes 50 minutes of registration. if...
the average length of time for students to register for fall classes at a certain college has been 50 minutes
the average length of time for students to register for fall classes at a certain college has been 50 minutes. a new registration procedure using modern computing machine is being tried. if a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.90 minutes under the new system, test the hypothesis that the population mean is now less than 50 using:a. 0.05 level of significance and b. 0.01 level of significance.
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. (a) What is the probability of completing the exam in one hour or less? (b) What is the probability that a student will complete the exam in more than 60 minutes but less than 65 minutes? (c) Assume that the class has 50 students and that the examination period is...
nswer the following TWO questions uestion (1) (30 Marks A) (5 Marks) The time required to build a computer is normally distributed with a mean of 50 minutes and a standard deviation of 10 minutes. Wh...
nswer the following TWO questions uestion (1) (30 Marks A) (5 Marks) The time required to build a computer is normally distributed with a mean of 50 minutes and a standard deviation of 10 minutes. What is the probability that a computer is assembled in a time between 45 and 60 minutes? B) (5 Marks) It was noted that the amount of oil in each "32-ounce" bottle is actually a normally distributed random variable, with a mean of 32.2 ounces...
Hypothesis Testing for Population Means When the Population Standard Deviation is NOT known. Use the t-distribution...
Hypothesis Testing for Population Means When the Population Standard Deviation is NOT known. Use the t-distribution tables A pizza delivery chain advertises that it will deliver your pizza in no more than 20 minutes from when the order is placed. Being a skeptic, you decide to test and see if the mean delivery time is actually more than 20 minutes. For the simple random sample of 7 customers who record the amount of time it takes for each of their...
An automobile assembly line operation has a scheduled mean completion time, H, of 12 minutes. The...
An automobile assembly line operation has a scheduled mean completion time, H, of 12 minutes. The standard deviation of completion times is 1.2 minutes. It is claimed that, under new management, the mean completion time has decreased. To test this claim, a random sample of 41 completion times under new management was taken. The sample had a mean of 11.9 minutes. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that...
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 77 minutes and a standard deviation of 12 minutes.
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 77 minutes and a standard deviation of 12 minutes. Answer the following questions. a. What is the probability of completing the exam in one hour or less (to 4 decimals)? b. What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals)? c. Assume that the class has 60 students...
pls help The commercial for the new Meat Man Barbecue claims that it takes 10 minutes...
pls help
The commercial for the new Meat Man Barbecue claims that it takes 10 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 10 minutes. The advocate surveyed 13 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 11.6 minutes. The standard deviation for this survey group was 2.3 minutes. What can be concluded at the the a = 0.05 level of significance level of significance? Show...
An electronics manufacturing process has a scheduled mean completion time of 65 minutes. It is claimed...
An electronics manufacturing process has a scheduled mean completion time of 65 minutes. It is claimed that, under new management, the mean completion time, is less than 65 minutes. To test this claim, a random sample of 18 completion times under new management was taken. The sample had a mean completion time of 6 minutes and a standard deviation of 8 minutes. Assume that the population of completion times under new management is normally distributed. At the 0.05 level of...
The waiting time to check out of a supermarket has had a population mean of 9.17...
The waiting time to check out of a supermarket has had a population mean of 9.17 minutes. Recently, in an effort to reduce the waiting time, the supermarket has experimented with a system in which there is a single waiting line with multiple checkout servers. A sample of 50 customers was selected, and their mean waiting time to check out was 7.31 minutes with a sample standard deviation of 4.3 minutes. At the 0.01 level of significance, using the p-value...
The commercial for the new Meat Man Barbecue claims that it takes 14 minutes for assembly....
The commercial for the new Meat Man Barbecue claims that it takes 14 minutes for assembly. A consumer advocate thinks that the assembly time is different than 14 minutes. The advocate surveyed 11 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 12.6 minutes. The standard deviation for this survey group was 2.6 minutes. a) What is the Null and alternative hypotheses. b) What can be concluded at the the a = 0.05...
nswer the following TWO questions uestion (1) (30 Marks A) (5 Marks) The time required to build a computer is normally distributed with a mean of 50 minutes and a standard deviation of 10 minutes. What is the probability that a computer is assembled in a time between 45 and 60 minutes? B) (5 Marks) It was noted that the amount of oil in each "32-ounce" bottle is actually a normally distributed random variable, with a mean of 32.2 ounces...
An automobile assembly line operation has a scheduled mean completion time, H, of 12 minutes. The standard deviation of completion times is 1.2 minutes. It is claimed that, under new management, the mean completion time has decreased. To test this claim, a random sample of 41 completion times under new management was taken. The sample had a mean of 11.9 minutes. Assume that the population is normally distributed. Can we support, at the 0.01 level of significance, the claim that...
pls help
The commercial for the new Meat Man Barbecue claims that it takes 10 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 10 minutes. The advocate surveyed 13 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 11.6 minutes. The standard deviation for this survey group was 2.3 minutes. What can be concluded at the the a = 0.05 level of significance level of significance? Show...
An electronics manufacturing process has a scheduled mean completion time of 65 minutes. It is claimed that, under new management, the mean completion time, is less than 65 minutes. To test this claim, a random sample of 18 completion times under new management was taken. The sample had a mean completion time of 6 minutes and a standard deviation of 8 minutes. Assume that the population of completion times under new management is normally distributed. At the 0.05 level of...
The commercial for the new Meat Man Barbecue claims that it takes 14 minutes for assembly. A consumer advocate thinks that the assembly time is different than 14 minutes. The advocate surveyed 11 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 12.6 minutes. The standard deviation for this survey group was 2.6 minutes. a) What is the Null and alternative hypotheses. b) What can be concluded at the the a = 0.05...
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