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Compute a confidence interval from sample data
I have sample data which I would like to compute a confidence interval for, assuming a normal distribution.
4 Answers
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micro:bit 微控制器教程 · App Inventor 2 中文网
... 下载和准备
下载资源
App Inventor 端设置
Designer 页面设置
积木编程
步骤1：蓝牙初始化
步骤2：设备选择
步骤3：读取温度传感器
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PHP shell_exec() vs exec()
I'm struggling to understand the difference between shell_exec() and exec() ...
4 Answers
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SQL Server CTE and recursion example
I never use CTE with recursion. I was just reading an article on it. This article shows employee info with the help of Sql server CTE and recursion. It is basically showing employees and their manager info. I am not able to understand how this query works. Here is the query:
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Perl flags -pe, -pi, -p, -w, -d, -i, -t?
I have seen lots of ways of running Perl code or scripts, with different flags. However, when I try to google for what each flag means, I mainly get results to generic Perl sites and no specific information regarding the flags or their use is found there.
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Define variable to use with IN operator (T-SQL)
I have a Transact-SQL query that uses the IN operator. Something like this:
14 Answers
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How to read a file into a variable in shell?
I want to read a file and save it in variable, but I need to keep the variable and not just print out the file.
How can I do this? I have written this script but it isn't quite what I needed:
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How do I force make/GCC to show me the commands?
I'm trying to debug a compilation problem, but I cannot seem to get GCC (or maybe it is make??) to show me the actual compiler and linker commands it is executing.
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How do I discover memory usage of my application in Android?
How can I find the memory used on my Android application, programmatically?
9 Answers
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How do you find the row count for all your tables in Postgres
I'm looking for a way to find the row count for all my tables in Postgres. I know I can do this one table at a time with:
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