The interquartile range is 4
Answer: The required confidence interval would be (2.72,2.89)
Step-by-step explanation:
Since we have given that
Mean = 2.8 pounds
Standard deviation = 0.24 pounds
n = sample size = 16
We need to find the 80% confidence interval for the mean waste.
z=1.341
So, the confidence interval will be

Hence, the required confidence interval would be (2.72,2.89)
Answer:
C. -7
Step-by-step explanation:
See the picture for steps :)