7. use the aggregate() function to compute the sample sizes (ozn), means (ozm), and standard deviations (ozsd) for the control and ozone treatment groups, and then compute the standard errors (ozse) for both groups. make sure the numeric values are visible in your output. copy/paste your r commands and the resulting output into the green box below. (1 point)

answer; i believe the correct answer is (expression); good luck

we need a link or picture : )

i would first let him be aware that a cover letter is official and confidential and it requires a proper formatting so that the employer doesn't have hard time when going through it. he should write it in paragraphs of about two to four sentences and use proper grammar a , spelling and proper punctuation. i will also advice him not to be emotional and not also to use images.then base his attention to the details of the job described and not other things. that is he be specific to the responsibilities and to the employers requirements. on this he should make sure that the letter reflects how good he is for the requirements detailed by the employer

the letter should not be too long nor too short.