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The weights of a certain sort of insect are normally distributed, with
[#permalink]
15 Apr 2022, 10:15
15 Apr 2022, 10:15
Expert Reply
00:00
Question Stats:
80% (00:55) correct
20% (00:58) wrong based on 5 sessions
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The weights of a certain sort of insect are normally distributed, with a mean of 35 grams and a standard deviation of 10 grams. Approximately what percentage of these insects weigh between 25 and 45 grams?
Show: ::
68%
Part of the project: GRE Quantitative Reasoning Daily Challenge - (2022) EDITION
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GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
Re: The weights of a certain sort of insect are normally distributed, with
[#permalink]
15 Apr 2022, 11:51
15 Apr 2022, 11:51
1
Mean is 35g and 1 SD is 25g and 45g, so 1 SD from mean for a normally distributed weight should be 34% + 34% --> 68%
gmatclubot
Re: The weights of a certain sort of insect are normally distributed, with [#permalink]
15 Apr 2022, 11:51
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