Shiloh is doing a survey to find the time her classmates spend at the beach. She asks the following question:
2 answers:
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<h3><u>Answer:</u></h3>
- 400 is the number.
<em>There can be many ways to find the number.</em><em> I have found the number with the help of fractions and multiplication. </em><em>Below is the solution to your problem.</em>
- 80 = 20/100
- => 5 x 80 = 20 x 5/100
- => 400
<em>Hence, 80 is 20% of 400. </em><em>I hope my method helped you.</em>
Answer: a) 0.84 b) 0.67 c) 1.28
Step-by-step explanation:
Using the standard normal distribution table for z-value , we have
(a) The value of would result in a 80% one-sided confidence interval :
(b) The value of would result in a 85% one-sided confidence interval :
(c) The value of would result in a 90% one-sided confidence interval :