Refer to the accompanying data display that results from a simplerandom sample of times (minutes) between eruptions of the OldFaithful geyser. The confidence level of 95% was used. Completeparts (a) and (b) below.crunch2Get more help.a. Express the confidence interval in the format that uses the "less than" symbol. Round the confidence interval limits given that the original times are all rounded to one decimal placemin<μ< min(Round to two decimal places as needed)WSX#m3edC$4Cf%5Vt9ATInterval(85.74,91.76)x=88.75Sx=8.897431411Oll<6n=36DELLyb&7hOJn* 008jOiO3k✓OClear allOLNov 29PaltCheck answer>3:51 US O+ 11ctrl?Gback1

AnswerGiven,[85.74, 91.76]x = 88.75sx = 8.897431411n = 36

Answered: Refer to the accompanying data display…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Please answer the question in the picture below to answer the question in the other picture
Assume that adults have IQ scores that are normally distributed with a mean of 100.2 and a standard deviation 20.9. Find the first quartile Q₁, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)
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A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x= 14.3 books and s= 16.6 books. Construct a 90% confidence interval for the mean number of books people read. E Click the icon to view the table of areas under the t-distribution, Construct a 90% confidence interval for the mean number of books people read. ) (Use ascending order. Round to two decimal places as needed.)
Assume that adults have IQ scores that are normally distributed with a mean of 100.4 and a standard deviation 23.2. Find the first quartile Q1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is: (Type an integer or decimal rounded to one decimal place as needed.)
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