Mathematics, 23.04.2021 22:20, EnzoF17

A Pew Research study finds that 23% of Americans use only a cell phone, and no land line, for making phone calls (The Wall Street Journal, October 14, 2010). A year later, a researcher samples 200 Americans and finds that 51 of them use only cell phones for making phone calls. Set up the hypotheses in order to determine whether the proportion of Americans who solely use cell phones to make phone calls differs from 23%.

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:30, inucornspineapple

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

Answers: 1

continue

Mathematics, 22.06.2019 04:00, nssjdjsididiodododod

The bottom of ignacio's desktop is 74.5cm from the floor. ignacio's sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk

Answers: 1

continue

Mathematics, 22.06.2019 07:30, abdullahs4639

Solve the system of equations algebraically. 5x - 3y = 6 6x - 4y = 2 a. many solutions b. (8, 14) c. no solution d. (9,13)

Answers: 2

continue

Mathematics, 22.06.2019 07:40, nady82

If the discriminant if a qudratic equation is 4, which statement describes the roots?

Answers: 1

continue

Do you know the correct answer?

A Pew Research study finds that 23% of Americans use only a cell phone, and no land line, for making...