From past records it is known that the average life of a battery used in a digital clock is 305 days.The battery life is normally distributed.The battery was recently modified to last longer.A sample of 20 of the modified batteries was tested.It was discovered that the mean life was 311 days and the sample standard deviation was 12 days.We wanted to test at the 0.05 level of significance whether the modification increases the life of the battery.What is our decision rule?

Do not reject the null hypothesis if computed t is 1.96 or greater.

Reject the null hypothesis if computed t is less than 1.96.

Do not reject the null hypothesis if computed t is 1.729 or greater

Reject the null hypothesis if computed t is 2.086 or greater

None of the above

If= 0.05 for a two-tailed test, how large is the acceptance area?

0.050

0.025

0.950

0.975

None of the above

Jared Farms produced the following amount of beef (in tons) at 3 of its megafarms: 50, 45, and 36.Four other megafarms produced the following amount of pork: 44, 26, 35, and 45.Three other megafarms produced the following amount of chicken: 72, 56, and 66.Conduct an ANOVA test to determine whether there is a statistically significant difference in the amount of beef, pork, or chicken produced.Use the .05 significance level.What is the alternate hypothesis?

H0: m1 = m2

H0: m1 = m2 = m3

H0: m1 = m2 = m3 = m4

H1: m1 m2

H1: m1 m2 m3

H1: m1 m2 m3 m4

None of the above

Jared Farms produced the following amount of beef (in tons) at 3 of its megafarms: 50, 45, and 36.Four other megafarms produced the following amount of pork: 44, 26, 35, and 45.Three other megafarms produced the following amount of chicken: 72, 56, and 66.Conduct an ANOVA test to determine whether there is a statistically significant difference in the amount of beef, pork, or chicken produced.Use the .05 significance level.What is the null hypothesis?

H0: m1 = m2

H0: m1 = m2 = m3

H0: m1 = m2 = m3 = m4

H1: m1 m2

H1: m1 m2 m3

H1: m1 m2 m3 m4

None of the above

Jared Farms produced the following amount of beef (in tons) at 3 of its megafarms: 50, 45, and 36.Four other megafarms produced the following amount of pork: 44, 26, 35, and 45.Three other megafarms produced the following amount of chicken: 72, 56, and 66.Conduct an ANOVA test to determine whether there is a statistically significant different in the amount of beef, pork, or chicken produced.Use the .05 significance level. What is the value of k?

2

3

4

7

9

10

None of the above