Assume that we want to construct a confidence interval. Do one of the following, as appropriate. (a) Find the critical value zα/2; (b) find the critical value tα/2; or (c) state that neither the normal nor the t distribution applies. Confidence level is 95%; n=10; σ is not known; and the normal quantile plot of measured right-ear hearing thresholds from 10 randomly selected adult females is shown to the right. 515-2-1.6-1.2-0.8-0.400.40.81.21.62X-Valuesz-score A coordinate system has a horizontal axis labeled X-Values from 5 to 15 in intervals of 1 and a vertical axis labeled z-score from negative 2 to 2 in intervals of 0.4. The following points are shown on the scatterplot: (5, negative 0.7), (5, negative 0.4), (5, negative 0.2), (5, 0.2), (5, 0.4), (5, 0.5), (5, 1.1), (5, 1.7), (10, negative 1.2), (15, negative 1.7). A straight line extends from the point (5, 0.3) to the point (15, negative 1.9). All coordinates are approximate. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. zα/2= (Round to two decimal places as needed.) B. tα/2= (Round to two decimal places as needed.) C. Neither the normal nor the t distribution applies.

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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Question

Assume that we want to construct a confidence interval. Do one of the following, as appropriate. (a) Find the critical value

zα/2;

(b) find the critical value

tα/2;

or (c) state that neither the normal nor the t distribution applies.

Confidence level is

95%;

n=10;

is not known; and the normal quantile plot of measured right-ear hearing thresholds from 10 randomly selected adult females is shown to the right.

515-2-1.6-1.2-0.8-0.400.40.81.21.62X-Valuesz-score

A coordinate system has a horizontal axis labeled X-Values from 5 to 15 in intervals of 1 and a vertical axis labeled z-score from negative 2 to 2 in intervals of 0.4. The following points are shown on the scatterplot: (5, negative 0.7), (5, negative 0.4), (5, negative 0.2), (5, 0.2), (5, 0.4), (5, 0.5), (5, 1.1), (5, 1.7), (10, negative 1.2), (15, negative 1.7). A straight line extends from the point (5, 0.3) to the point (15, negative 1.9). All coordinates are approximate.

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

zα/2=

(Round to two decimal places as needed.)

tα/2=

(Round to two decimal places as needed.)

Neither the normal nor the t distribution applies.

System that uses coordinates to uniquely determine the position of points. The most common coordinate system is the Cartesian system, where points are given by distance along a horizontal x-axis and vertical y-axis from the origin. A polar coordinate system locates a point by its direction relative to a reference direction and its distance from a given point. In three dimensions, it leads to cylindrical and spherical coordinates.

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