95% CI= ( (Round to selected at random and nten thar gs wwrww9 b) Explain what y
ID: 3321890 • Letter: 9
Question
95% CI= ( (Round to selected at random and nten thar gs wwrww9 b) Explain what y 0 A, interval m we are 95% confident that a the time that f We are 95% confident B. sampled terval limitident would confidence that the true percentage of accidents involving teenagers falls inside the interval limits tr We are 95% c) Explain what "95% confidence" means About 95% of random samples of size 565 will prod accidents involving teenagers. uce (1) that contain(s) the (2) d) A politician urging tighter restrictions on drivers' licenses issued to teens says five auto accidents, a , "In one of every interval support or contradict this statement? eraser is behind the wheel." Does the confidence O A. OB. The confidence interval contradicts the assertion of the politician. The figure quoted by the The confidence interval supports the assertion of the politician. The figure quoted by the politician is inside the interval politician is inside the interval. The confidence interval supports the assertion of the politician. The figure quoted by the politician is outside the interval. ° C. The confidence interval contradicts the assertion of the politician. The figure quoted by the politician is outside the interval. 0 D. (2) O confidence interval O a true proportion O a sample proportion O confidence intervals (1) O true proportion O sample proportionExplanation / Answer
a)
b)
CI means -> Option B
c)
95% CI means -> 1) Confidence intervals 2) sample proportion
d)
Option D
n 565 p 0.166371681 z-value of 95% CI 1.9600 SE = sqrt(p*(1-p)/n) 0.01567 ME = z*SE 0.03071 Lower Limit = p - ME 0.13566 Upper Limit = p + ME 0.19708 95% CI (0.1357 , 0.1971 )Related Questions
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