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.

(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.

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.