题目

Problem

A basketball club has a large number of players. The heights, $x$ m, of a random sample of 10 of these players are measured. A 90% confidence interval for the population mean height, $\mu$ m, of players in this club is calculated. It is assumed that heights are normally distributed. The confidence interval is $1.78 \leq \mu \leq 2.02$ .

Find the values of $\sum x$ and $\sum x^2$ for this sample.

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题目中文翻译

一个篮球俱乐部有大量球员。随机抽取其中 10 名球员，测量他们的身高，记为 $x$ m。假设身高服从正态分布，并计算该俱乐部球员总体平均身高 $\mu$ m 的 90% 置信区间。该置信区间为 $1.78 \leq \mu \leq 2.02$ 。

求这组样本的 $\sum x$ 和 $\sum x^2$ 。

CIE 9231 2022 Nov Paper 42 Q1

题目

解答