Question

A producer of various kinds of batteries has been producing "D" size batteries with a life...

A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 40 batteries showed a sample mean life of 90.5 hours. assume that the population standard deviation is known to be 9 hours. Test at a 5% level of significance to see if there is evidence that the mean life of "D" batteries has increased. What is your Conclusion? SHOW ALL WORK and PLEASE MAKE LEGIBLE

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A producer of various kinds of batteries has been producing "D" size batteries with a life...
A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increasein the life expectancy of their "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. It is known that the standard deviation of the population is 9 hours. a. Give the null and the alternative hypotheses
A producer of various kinds of batteries has been producing "D" size batteries with a life...
A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increasein the life expectancy of their "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. It is known that the standard deviation of the population is 9 hours. b. Compute the test statistic.
A producer of various kinds of batteries has been producing "D" size batteries with a life...
A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 9 hours. a. Give the null and the alternative...
"D" size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because...
"D" size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of an improved production process, it is believed that there has been an increase in the life expectancy of its "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours and a (sample) standard deviation of 4 hours. a. The correct null hypothesis for this problem is    b. Compute the test statistic.    c. At 95% confidence using...
size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of...
size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of an improved production process, it is believed that there has been an increase in the life expectancy of its "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 9 hours. a. Formulate the hypotheses for this problem. b. Compute the test statistic....
"D" size batteries produced by MNM Corporation have had a life expectancy of 84.5 hours. An...
"D" size batteries produced by MNM Corporation have had a life expectancy of 84.5 hours. An improved production process in intended to increase in the life expectancy of its "D" sized batteries, but before fill production begins, the firm would like to determine whether the process actually increases battery life. A Sample of 64 batteries showed an everage life of 87 hours. Assume from past information that it is known that the standard deviation of the population is 16 hours....
"Sysnic" battery have had a life expectency of 115 hours. A sample of 49 batteries showed...
"Sysnic" battery have had a life expectency of 115 hours. A sample of 49 batteries showed an average life of 118.5 hours. From past information, it is known that population standard deviation of the batteries is 6 hours, and that the life expectency of batteries follow normal distribution. - If nothing has been changed in a life expectancy of all battteries, what is the probability that sample mean of 49 show average life of 118.5 hours or longer?
A popular flashlight that uses two D-size batteries was selected, and several of the same models...
A popular flashlight that uses two D-size batteries was selected, and several of the same models were purchased to test the "continuous-use life" of D batteries. As fresh batteries were installed, each flashlight was turned on and the time noted. When the flashlight no longer produced light, the time was again noted. The resulting "life" data from Rayovac batteries had a mean of 20.4 hours. Assume these values have a normal distribution with a standard deviation of 1.5 hours. (Give...
a tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. now...
a tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. now the company is advertising that their new tires' life expectancy has increased. in order to test the legitimacy of their advertising campaign, an independent testing agency tested a sample of 90 of their tires. the agency found the mean of the 90 tires to be 27,000 miles and the standard deviation to be 3,990 miles. use a 0.01 level of significance and test to...
A popular flashlight that uses two D-size batteries was selected, and several of the same models...
A popular flashlight that uses two D-size batteries was selected, and several of the same models were purchased to test the "continuous-use life" of D batteries. As fresh batteries were installed, each flashlight was turned on and the time noted. When the flashlight no longer produced light, the time was again noted. The resulting "life" data from Rayovac batteries had a mean of 21.8 hours. Assume these values have a normal distribution with a standard deviation of 1.38 hours. (Give...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT