Mathematics, 19.03.2021 18:50, johnlecona210
A travel company is investigating whether the average cost of a hotel stay in a certain city has increased over the past year. The company recorded the cost of a one-night stay for a Friday night in January of the current year and in the previous year for 31 hotels selected at random. The difference in cost (current year minus previous year) was calculated for each hotel.
Which of the following is the appropriate test for the companyâs investigation?
A. A one-sample zz-test for a population mean A
B. A one-sample tt-test for a sample mean B
C. A one-sample zz-test for a population proportion C
D. A matched-pairs tt-test for a mean difference D
E. A two-sample tt-test for a difference between means E
Answers: 1
Mathematics, 21.06.2019 14:00, Nevaeh3700
Solve the system. -a+4b+2c=-8 3a+b-4c=9 b=-1 a.(0,11) ,-1,2) c.(1,1,-2) d.(2,-1,-1)
Answers: 1
Mathematics, 21.06.2019 19:30, student0724
Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?
Answers: 1
Mathematics, 21.06.2019 21:00, izaiahfieods
Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list
Answers: 1
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