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Home Q & A Board Science-Related Homework Help Mathematics
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RENCEE72 RENCEE72
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6 years ago
A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph. If the sample size was 25 (other factors remain unchanged), the interval for  would _____.
 a. not change
  b. become narrower
  c. become wider
  d. become zero
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m7md9078m7md9078
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6 years ago
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RENCEE72 Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
kamikazekota
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Yesterday
Thank you, thank you, thank you!
TheMoffattMan
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2 hours ago
Brilliant ツ
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