According to the census bureau, 3.29 people reside in the typical american household. a sample of 16 households in arizona retirement communities showed the mean number of residents per household was 2.76 residents. the standard deviation of this sample was 1.29 residents. at the .05 significance level, is it reasonable to conclude the mean number of residents in the retirement community household is less than 3.29 persons?

Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.

Ill mark the brainliest if you me with the these three questions 7,8,9

Ineed with number 6 , explain how to get 1978