In a recent survey, a random sample of 199 office managers were asked about overtime, and 76 reported that they regularly work overtime each week. What value of z should be used to calculate a confidence interval with a 98% confidence level

2.326

Step-by-step explanation:

They are only asking which z-score should you use. To determine find the confidence interval which is 98% or .98.

Subtract this number by 1 and divide by 2.

1-.98=.02/2=.01

Find the correlating z-score for z.01 on the z-score chart which is 2.326

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

step-by-step explanation: