A random sample of 10 shipments of stick-on labels showed the following order sizes. 45,424 38,958 53,726 24,760 27,866 46,843 26,478 23,983 34,088 57,814 (a) Construct a 95 percent confidence interval for the true mean order size. (Round your standard deviation answer to 1 decimal place and t-value to 3 decimal places.) The 95 percent confidence interval to
(b) The confidence interval can be made narrower by:.
i. decreasing the sample size or decreasing the confidence level.
ii. increasing the sample size or increasing the confidence level.
iii. increasing the sample size or decreasing the confidence level.
iv. decreasing the sample size or increasing the confidence level.