1) option A is correct
2)option A is correct
3)
P(type i error)=P(Xbar<26750 given mean=27500)=P(Z<(26750-27500)*sqrt(35)/2500)=P(Z<-1.77)=0.0384 ( please try 0.0379 if this comes wrong and revert)
4)
P(power)=P(Xbar<26750 given mean=26600)=P(Z<(26750-26600)*sqrt(35)/2500)=P(Z<0.35)=0.6368 ( please try 0.6387 if this comes wrong and revert)
HW09: Problem 6 Previous Problem List Next (4 points) A tire manufacturer produces tires that have...
(4 points) A tire manufacturer produces tires that have a mean life of at least 32500 miles when the production process is working properly. The operations manager stops the production process if there is evidence that the mean tire life is below 32500 miles. The testable hypotheses in this situation are H0:μ=32500 vs HA:μ<32500 1. Identify the consequences of making a Type I error. A. The manager does not stop production when it is not necessary. B. The manager does...
A tire manufacturer produces tires that have a mean life of at least 25000 miles when the production process is working properly. The operations manager stops the production process if there is evidence that the mean tire life is below 25000 miles. The testable hypotheses in this situation are ?0:?=25000H0:μ=25000 vs ??:?<25000HA:μ<25000. 1. Identify the consequences of making a Type I error. A. The manager does not stop production when it is not necessary. B. The manager does not stop...
Tire Life Prompt: A major tire manufacturer claims their heavy-duty truck tires have an average usage life of 71,000 miles. The shipping department of the company you work for has been using these tires for several years and feels they are not getting the mileage promised. The manager pulled 25 maintenance records and found an average tire life of 68,050 miles, with a standard deviation of 11,602 miles. He asks you to conduct a test of hypothesis to determine if...
1. An automobile tire manufacturer would like to claim that the tread life (in miles) of a certain type of tire is greater than 30,000 miles. Assuming a normal population with 1500 miles answer the following for a test of the hypotheses Ho :-30,000 versus Ha : μ > 30,000 a) Ifa -.01 specify the rejection region as an inequality involving the value of the test statistic b) Based on a sample size of n 25, the corresponding rejection region...
(4 points) Fowle Marketing Research, Inc., bases charges to a cient on the assumption that telephone surveys can be completed within an average time of 15 mminutes or less. If more time is required, a premium rate is charged The testable hypotheses in this situation are H0 : μ = 15 vs. 14: μ > 15 1. Identify the consequences of making a Type l eror A. The company charges the customer the premium rate when they should. B. The...
(4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 16 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H M = 16 vs. H :N > 16 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company...
#3 (4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 18 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are ?0:?=18 vs. ??:?>18 1. Identify the consequences of making a Type I error. A. The company does not charge the customer the premium rate when they should. B. The company charges the customer...
Just parts 3 and 4 are confusing for me. (4 points) A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 2.7 hours, with a standard deviation of 0.5 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device and the manufacturer needs to decide whether or not to send out the new booklet. The...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 14 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H0:μ=14H0:μ=14 vs. Ha:μ>14Ha:μ>14 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company charges the customer the premium rate when they...
A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3.1 hours, with a standard deviation of 0.6 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device and the manufacturer needs to decide whether or not to send out the new booklet. The testable hypotheses in this situation are ?0:?=3.1H0:μ=3.1 vs ??:?<3.1HA:μ<3.1. 1. Identify...