Consider the accompanying data on flexural strength (mpa) for concrete beams of a certain type.

11.8 7.7 6.5 6.8 9.7 6.8 7.3

7.9 9.7 8.7 8.1 8.5 6.3 7.0

7.3 7.4 5.3 9.0 8.1 11.3 6.3

7.2 7.7 7.8 11.6 10.7 7.0

a) calculate a point estimate of the mean value of strength for the conceptual population of all beams manufactured in this fashion. [hint: ? xi = 219.5.] (round your answer to three decimal places.)

mpa

state which estimator you used.

x

p?

s / x

s

x tilde