An existing inventory for a test measuring self-esteem indicates that the scores have astandard deviationof9

.A psychologist gave the self-esteem test to arandom sampleof150

individuals, and theirmeanscore was70

.Construct a90

%

confidence intervalfor the truemeanof all test scores. Then give its lower limit and upper limit.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult alist of formulas.)

Lower limit:

Upper limit: