In the year 2001 Youth Risk Behavior survey done by the U. S. Centers for Disease Control, 747 out of 1168 female 12th graders said they always use a seatbelt when driving. Please construct a 98% confidence interval for the proportion of 12th-grade females in the population who always use a seatbelt when driving. 1) Use R to find the score CI for the proportion of 12th-grade females in the population who always use a seatbelt when driving (please round to 4 decimals).

98% of confidence interval of Population proportion is determined by

(0.60683 ,0.67217)

Step-by-step explanation:

Given the sample size n = 1168

Given 747 out of 1168 female 12th graders said they always use a seatbelt when driving

The sample proportion 'p' =

98% of confidence interval of Population proportion is determined by

The tabulated value Z₀.₀₂ score  = 2.326

on calculation , we get

(0.6395 -0.03267 , 0.6395 +0.03267)

(0.60683 ,0.67217)

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step-by-step explanation: