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Step2247 [10]
3 years ago
15

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.
Mathematics
1 answer:
Amanda [17]3 years ago
4 0

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.

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