Mathematics, 03.12.2019 18:31 robclark128

From generation to generation, the mean age when smokers first start to smoke varies. however, the standard deviation of that age remains constant at around 2.1 years. a survey of 44 smokers of this generation was done to see if the mean starting age is at least 19. the sample mean was 18.1 with a sample standard deviation of 1.3. do the data support the claim at the 5% level?

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:00, julliette27

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube

Answers: 3

continue

Mathematics, 21.06.2019 19:00, sreyasusanbinu

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Answers: 1

continue

Mathematics, 21.06.2019 19:50, khenalilovespandas

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.

Answers: 1

continue

Mathematics, 21.06.2019 21:50, safiyyahrahman8937

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

Answers: 1

continue

You know the right answer?

From generation to generation, the mean age when smokers first start to smoke varies. however, the s...