The following data resulted from 24 independent measurements of the melting point of lead.
|
330?C
|
322?C
|
345?C
|
|
328.6?C
|
331?C
|
342?C
|
|
342.4?C
|
340.4?C
|
329.7?C
|
|
334?C
|
326.5?C
|
325.8?C
|
|
337.5?C
|
327.3?C
|
322.6?C
|
|
341?C
|
340?C
|
333?C
|
|
343.3?C
|
331?C
|
341?C
|
|
329.5?C
|
332.3?C
|
340?C
|
Assuming that the measurements can be regarded as constituting a normal sample whose mean is the true melting point of lead, determine a 95 percent two-sided confidence interval for this value. Also determine a 99 percent two-sided confidence interval.