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In a survey, 29 people were asked how much they spent on their child's last birthday...

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Statistics

In a survey, 29 people were asked how much they spent on theirchild's last birthday gift. The results were roughly bell-shapedwith a mean of $33 and standard deviation of $15. Use thetheory-based inference applet to find theconfidence interval at a 99% confidence level. Give youranswers to one decimal place.

  • We are 99% confident that the average (mean) amount that peoplespent on their child's last birthday gift, ĂŽÂĽĂŽÂĽ, wasbetween  dollars and  dollars.
  • The sample statistic is  dollars.
  • The margin of error is  dollars.
  • The confidence interval can be written as
    dollars ±±  dollars.

Answer & Explanation Solved by verified expert
4.1 Ratings (585 Votes)
Solution Given thatPoint estimate sample mean 33 dollarssample standard deviation s 15    See Answer
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