Question

Sherds of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels at the Wind Mountain archaeological sitet. A random sample of ceramic vessels gave the following rim diameters (in centimeters). 15.9 13.4 22.1 12.7 13.1 19.6 11.7 13.5 17.7 18.1 (a) Use a calculator with mean and sample standard deviation keys to find the sample mean x and sample standard deviation s. (Round your answers to one decimal place.) x = cm s= cm (b) Compute a 90% confidence interval for the population mean u of rim diameters for such ceramic vessels found at the Wind Mountain archaeological site. (Round your answers to one decimal place.) lower limit upper limit

Answer 1

Salu Ha let 13 4 221 12:7 131 19.6 11 135 17.7 18. abue datu by calculahon hElo ZxIS780 EX-2597.88 I57 8D lo XI5.780 o X-15.78 x-Is.

S- n-1. S 3.4668 s34 Ans 5.8 Cm S 3.4 Cm Con fidence nknal for Consmuct 99 2n-1) Vn (15.8+ 3.25 3.4 VIO (15.8+ 3.4943) (15.8-3.4993 15-8+3-4943 12.305 19-29 43) z (2.30 19.29) lower limit2.3 (m UPprr limit 19.2 Cm