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AP Statistics 2.1 Exploring Data. How does this change affect the mean, standard deviation, and IQR?
AP Statistics 3.1 Statistical Inference 7 Views
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Description:
AP Statistics 3.1 Statistical Inference. Based on the numbers given, which of the following statements is true?
Transcript
- 00:04
And here's your shmoop du jour brought to you by Halloween the
- 00:07
day designated for handing out miniature candy bars unidentifiable chewy things [Girl handing out treats to children trick or treating]
- 00:12
and home baked stuffed with burn marks on the bottom..an apples..Alright 31
- 00:19
out of 75 high school students planned on trick-or-treating based on the
- 00:23
numbers given which of the following statements is true if we calculate a
Full Transcript
- 00:26
confidence interval with a confidence level of ninety percent all right here are
- 00:30
the potential answers....Okay well ever wonder why no one ever dresses up as a [People dressed up together in a park]
- 00:38
statistician on Halloween? Well probably because they would spend most
- 00:42
of their time calculating the true proportion of edible versus inedible [Statisticians performing calculations]
- 00:46
nevermind, okay on to the problem we go let's do the math based on 31 who are
- 00:51
going trick-or-treating out of our sample of 75 we also need to consider [children running out of a classroom to trick or treat]
- 00:55
the 44 out of the 75 who have decided to take no part in the tp'ing and/or egging
- 01:00
of houses using the numbers we have to calculate our formula the ninety percent [formula of the confidence interval]
- 01:05
confidence level indicates a plus minus nine point three six percent while the
- 01:11
true population proportion of trick-or-treaters is between 31.97
- 01:16
percent and 50.69 percent the only one of the possible answers
- 01:21
that matches that description is answer C, right there. If you answered correctly
- 01:25
you can expect a two-foot-long gummy worm in your Halloween goody bag this [Little girl in a halloween costume holding a goody bag]
- 01:29
year, just make sure it's actually a gummy if it tries to crawl back out of your mouth
- 01:33
well you may want to avoid that house in future years[children screaming out trick or treating]
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