Find the critical value χ r corresponding to a sample size of 15 and a confidence level of 90%. 023.685 06.571 o31.319 o29.141

Step-by-step explanation:

i) Confidence level = 90%

ii) therefore significance level =  =  

iii) this problem is for a two tailed test.

iv) therefore significance level = = = 0.05

iii) sample size = 15

iv) therefore degrees of freedom  = sample size  - 1   =   15 - 1    =  14

v) the upper ( or right) chi squared value,  from Chi squared critical value tables = 23.685

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

answer: 2530

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