Question

In: Statistics and Probability

The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...

The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to

7544 hours. The population standard deviation is 1080 hours A random sample of 81 light bulbs indicates a sample mean life of 7244 hours.

a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7544 hours?

b. Compute the​ p-value and interpret its meaning.

c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs.

d. Compare the results of​ (a) and​ (c). What conclusions do you​ reach?

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,527 hours. The population standard deviation is 840 hours. A random sample of 49 light bulbs indicates a sample mean life of7,347 hours. a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,527 hours? b. Compute the​ p-value and interpret its meaning. c. Construct a...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,531 hours. The population standard deviation is 1,080 hours. A random sample of 8181 light bulbs indicates a sample mean life of 7,231 hours. a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,531 hours? b. Compute the​ p-value and interpret its meaning. c. Construct...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,476 hours. The population standard deviation is1,080 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,176 hours. a. At the0.05 level of​ significance, is there evidence that the mean life is different from 7,476 hours? b. Compute the​ p-value and interpret its meaning. c. Construct a 95​%...
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the...
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFL's is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFL's indicates a sample mean life of 7,250 hours. Level of significance is 0.05. 1. What is the p-value? Round to 4 decimal places i.e 0.0432 2. What is the critical value? Round answer to 4 decimal places i.e....
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,501 hours. The population standard deviation is 700 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,351 hours. a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,501 hours? b. Compute the​ p-value and interpret its meaning. c. Construct...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the...
The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,487 hours. The population standard deviation is 1,080 hours. A random sample of 81 light bulbs indicates a sample mean life of 7,187 hours. a. At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,487 hours? b. Compute the​ p-value and interpret its meaning. c. Construct...
The quality control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether...
The quality control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,200 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7,500 hours? b. Compute the p-value and interpret its meaning. c. Construct...
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the...
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7.505 hours. The population standard deviation is 100 hours. A random sample of 64 light bulbs indicates a sample mean life of 7.480 hours. a. At the 0.05 level of significance, is there evidence that the mean life is different from 7.505 hours? b. Compute the p-value and interpret its meaning. c. Construct...
1. The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether...
1. The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is at least 7,500 hours. A random sample of 64 CFLs indicates a sample mean life of 7,250 hours. At the 0.05 significance level, is there evidence that the mean life is less than 7,500 hours? Assume the population standard deviation is 1,000 hours. Assume the sample standard deviation is 1,000 hours.
25. The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether...
25. The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7,485 hours. The population standard deviation is 840 hours. A random sample of 49 light bulbs indicates a sample mean life of 7,305 hours At the 0.05 level of​ significance, is there evidence that the mean life is different from 7485? Determine the null​ hypothesis, and the alternative​ hypothesis What is the...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT