what is the null hypothesis in words? group of answer choices the (population) mean amount of time reading and sending e-mails daily is greater than 60 minutes. the (population) mean amount of time reading and sending e-mails daily is equal to 60 minutes the (sample) mean amount of time reading and sending e-mails daily is equal to 60 minutes. the (sample) mean amount of time reading and sending e-mails daily is greater than 60 minutes.