Question

The weights of four randomly and independently selected bags of potatoes labeled 20.0 pounds were found to be 20.8​, 21.3​, 20.7​, and 21.2 pounds. Assume Normality. Answer parts​ (a) and​ (b) below. a. Find a​ 95% confidence interval for the mean weight of all bags of potatoes.

Answer 1

Answer:

(20.532 , 21.468)

Step-by-step explanation:

Enter data into L₁

CL= 0.95

df= 3

Distribution:  xbar ~ t₃

Calculator commands (for TI only): [Stat],[TESTS],[TInterval],[Data],(List: L₁),(Freq:1),(C-Level:0.95),[Calculate]

Confidence interval (20.532,21.468)

We can conclude that the true population mean for bags of potatoes labeled 20.0 pounds is between (20.532,21,468) with a 95% confidence level.