to -2 points Devorestatg 6.E-502 XP. A sample of 20 students who had recently ta

Question

to -2 points Devorestatg 6.E-502 XP. A sample of 20 students who had recently taken elementary statistics yielded the following information on brand of calculator owned. Texas Instruments, H Hewlett Packard, C- Casio, S Sharp): C T H T H T S T C C S S S C H C T HSH (a) Estimate the true proportion of all such students who own a Texas Instruments calculator. (b) of the 5 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? LRead Talk to a Tutor Submit Assignment Save Assignment Progress Home My Assignments Extension Requesf Ask Your Te

Explanation / Answer

(a) Note that you have N = 20 students and x = 5 types of calculators. So the true proportions is p = x/N = 5/20 = 0.25.

(b) You have x = 17 non TI graphing calculators. Thus, the proportional estimate of those students not owning a TI graphing calculator is p = 17/20 = 0.85

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