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Author Question: The average battery life of the iPhone is reported to be 7.0 hours. Assume that the standard ... (Read 125 times)

ssal

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on: Jun 24, 2018
The average battery life of the iPhone is reported to be 7.0 hours. Assume that the standard deviation for the battery life for this cell phone is 45 minutes. A random sample of 38 iPhones had an average battery life of 6.5 hours.
 
  Which of the following statements is correct?A) The interval that contains 95 of the sample means is 6.76 and 7.24 hours. Because the sample mean is not between these two values, we do not have support that the average battery life equals 7.0 hours.
  B) The interval that contains 95 of the sample means is 5.50 and 8.50 hours. Because the sample mean is between these two values, we do not have support that the average battery life equals 7.0 hours.
  C) The interval that contains 95 of the sample means is 5.50 and 8.50 hours. Because the sample mean is between these two values, we have support that the average battery life equals 7.0 hours.
  D) The interval that contains 95 of the sample means is 6.76 and 7.24 hours. Because the sample mean is not between these two values, we have support that the average battery life equals 7.0 hours.

Question 2

The smaller the test statistic for the Wilcoxon signed-rank test, the more likely that we will be able to reject the null hypothesis.
 
  Indicate whether the statement is true or false
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ryrychapman11

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Reply #1 on: Jun 24, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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ssal

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Reply 2 on: Jun 24, 2018
:D TYSM

helenmarkerine

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Reply 3 on: Yesterday
Excellent

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