Please answer both questions and i promise to give you a thumbs up. Thank you in

Question

Please answer both questions and i promise to give you a thumbs up. Thank you in advance

A Chapter G Point Estimati ×NeChegg Study Order Con. C www.webassign.net/web/Student/Assignment Responses last?dep-17492588 xq12 11. -1 polnts DevoreStat9 6.E.037 My Notes Ask Your Teacher When the sample standard deviation S is based on a random sample from a normal population distribution, it can be shown that E(S) = v 2/(n-1)(n/2)o/r(n-1)/2) Use this to obtain an unbiased estimator for of the form cs. What is c when n : 167 (Round your answer. to four decimal places.) Need Help? Read It Talk to a Tutor 12. 0/2 points | Previcus Answers DevoreStat9 6.E.502.XP My Notes Ask Your Teacher A sample of 20 students who had recently taken elementary statistics yielded the following information on brand of calculator owned. (T-Texas Instruments, H-Hewlett Packard, C-Casio, S- Sharp): CSSHHHCTCS HTSSTSCTHS (a) Estimate the true proportion of all such students who own a Texas Instruments calculator. Enter a nurnbe (b) Of the 4 students who owned a TI calculator, 3 had graphing calculators. Estimate the proportion of students who do not own a TI graphing calculator. Need Help? Read It Talk to a Tutor 9:41 AM Search the web and Windows ^ ..!(x 11/15/2017

Explanation / Answer

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12)

a) n = 20

People who own a TI = 4

So,

proportion = 4/20 = 0.2

b) 3 have graphing out of 4

1 out of 4 didnot have graphing calculator

So,

proportion not having this = 17/20 = 0.85

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