To verify the students' income, 150 students were selected at random and an average of 2.3 minimum wages was obtained, with a standard deviation of 1.8. So the incorrect statement is:
To verify the students' income, 150 students were selected at random and an average of 2.3 minimum wages was obtained, with a standard deviation of 1.8. So the incorrect statement is:
( ) Dramatically reducing the number of respondents increases the length of the confidence interval
( ) the length of the 95% confidence interval for the mean is shorter than the length of the 99% confidence interval for the mean
( ) the 95% confidence interval for the mean salary is (2.010 ; 2,590)
( ) the 90% confidence interval for the mean salary is (2,157 ; 2,742) the 95% confidence interval for the mean salary is (2,010 ; 2,590)
( ) The sample mean is not always less than the population mean
** If you know how to do it using the R language, perfect. Otherwise do it by the traditional method <3 **
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