Question
Suppose the scores of a standardized test are normally distributed. If the population standard deviation is 4 points, what minimum sample size is needed to be 95% confident that the sample mean is within 1 point of the true population mean?
![](https://skilledtutorials.com/wp-content/uploads/2022/11/Confidence-Interval-for-Mean.png)
Ans: 62
Question
Suppose the weights, in pounds, of the dogs in a city are normally distributed. If the population standard deviation is 3 pounds, what minimum sample size is needed to be 95% confident that the sample mean is within 1 pound of the true population mean?
![](https://skilledtutorials.com/wp-content/uploads/2022/11/2-1.png)
Ans: ____________
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