Answer:
Step-by-step explanation:
i) Confidence level = 90%
ii) therefore significance level = [tex]\alpha[/tex] = [tex]\frac{100 - 90}{100}\hspace{0.1cm} = \hspace{0.1cm} 0.1[/tex]
iii) this problem is for a two tailed test.
iv) therefore significance level = [tex]\frac{\alpha }{2}[/tex] = [tex]\frac{0.1}{2}[/tex] = 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, [tex]\chi^2_{R}[/tex] from Chi squared critical value tables = 23.685
