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Author Question: Dover Motors is a car dealership that sells new and used cars. Suppose they sold 140 used cars ... (Read 141 times)

ishan

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on: Jun 24, 2018
Dover Motors is a car dealership that sells new and used cars. Suppose they sold 140 used cars during the most recent quarter. The average selling price was 10,325 with a standard deviation of 2,880.
 
  A random sample of 60 used cars from this population was selected. What is the probability that the sample mean exceeds 10,000?A) 0.5987
  B) 0.6736
  C) 0.8749
  D) 0.9115

Question 2

A survey by American Express Spending reported that the average amount spent on a wedding gift for a close family member is 166. A random sample of 45 people who purchased wedding gifts for a close family member spent an average of 160.50.
 
  Assume that the population standard deviation is 38. Use a 95 confidence interval to test the validity of this report and choose the one statement that is correct.A) Because this confidence interval does not include 166, the report by American Express Spending is not validated.
  B) Because this confidence interval does not include 166, the report by American Express Spending is validated.
  C) Because this confidence interval does include 166, the report by American Express Spending is validated.
  D) Because this confidence interval does include 166, the report by American Express Spending is not validated.
Business Statistics ¦ Donnelly ¦ 2nd Edition
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sultansheikh

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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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ishan

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Reply 2 on: Jun 24, 2018
Wow, this really help

mammy1697

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Reply 3 on: Yesterday
Gracias!

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