Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. 54 60 66 50 62 58 65 50 54 a) Use a 90% confidence level to estimate the margin of error associated with estimating the true mean. (Round to the nearest hundredths)b) Construct the 90% confidence interval to estimate the true mean retirement age. (Round to the nearest Tenths)c) Construct the 90% confidence level to estimate the true standard deviation.(Round to the nearest Tenths)

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Find the nonpermissible replacement for binthis expression.b2/5b +5