Questions
251R [SEJONG-UNDERGRADUATE]商业统计学-03班 第 13 周视频前测验
Single choice
如果这是来自正常总体的随机样本,并且假设了样本均值和样本方差,那么统计量的分布是什么?

View Explanation
Verified Answer
Please login to view
Step-by-Step Analysis
题干在说:来自正态总体的随机样本,且假设使用了样本均值和样本方差来估计总体参数。下面逐条分析。
首先,若总体方差已知,则以样本均值的分布为主线,标准化后......Login to view full explanationLog in for full answers
We've collected over 50,000 authentic exam questions and detailed explanations from around the globe. Log in now and get instant access to the answers!
Similar Questions
The critical value t 𝛼 2 ,k is the (1- 𝛼 /2) - quantile for a t distribution with k degrees of freedom. Compute t 𝛼 2 ,k when 𝛼 = .02 and k = 17
The student academic group on a college campus claims that second-year students study around 2.7 hours per day, on average. However, one Introduction to Statistics class at Emory believed that the average would be significantly greater than 2.7 hours per day, so they took a random sample of 28 second-year students and performed a two-sided hypothesis test. At 𝛼 = 0.01, which of the following represents the smallest test statistic required to reject the null hypothesis? You must use the t-table to answer this question. Also, treat the test statistic as is; Do NOT round up or down the numbers below.
Which of the following is true regarding the t-distribution?
A scientist is investigating the average rate of enzyme activity in a species of freshwater algae under controlled lab conditions. The rate of activity is known to follow a Normal distribution in the population. The scientist randomly selects a sample of n = 9 algae specimens. They calculate point estimates for the mean enzyme activity rate and the standard deviation of the population based on the sample. They then estimate the standard error of the sample mean enzyme activity rate. Assuming this sampling method is used in future experiments, what is the probability that the sample mean enzyme activity rate will fall within .6 estimated standard errors of the true population mean?
More Practical Tools for Students Powered by AI Study Helper
Making Your Study Simpler
Join us and instantly unlock extensive past papers & exclusive solutions to get a head start on your studies!