A store emails all of its (several thousands of) customers an online survey. Of all its customers, 302 reply to the survey and of these, 215 gave a five-star rating to their experience shopping at the store. The manager could estimate that 215/302 (or about 71%) of all customers would give a five-star rating, but why is a Z-interval not valid for a confidence interval here? Select all that apply. The proportion of the population of all customers is not approximately normal. The number of customers in the sample is not large enough. The sample was not randomly selected. The proportion of the population of all customers is known already.

europa2433

europa2433

step-by-step explanation:

a. she will receive a refund of $278.

step-by-step explanation:

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

answer: what is the conflict?

step-by-step explanation:

*what has happened to new york city?

*what is in the time capsule?

* what did the kidz see that gave them hope?

*what will they do with what they find?

* how will they save the city?

* what challenges will they face along the way?

*what big choice will they make at the climax of the story?

* what lesson do they learn at the end of the story?