Mathematics, 19.05.2021 18:40 corvettapj6583

An online streaming service providing television programs claims that a 30-minute program will stream with advertisements that average 45 seconds. A consumer advocacy group is investigating to see if this claim is true. They recorded the times of 21 randomly selected advertisements. The times are listed below: Time (seconds) 45 45 43 50 50 45 43 50 45 49 46 48 42 46 44 52 48 45 46 50 48
The mean and standard deviation for these times are 46.67 and 2.78 seconds respectively. Do these data provide convincing evidence that the true mean advertisement length is longer than 45 seconds?

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 17:30, kelenski4

Which of the following is true for the relation f(x)=2x^2+1

Answers: 3

continue

Mathematics, 21.06.2019 19:30, Jenan25

Consider this equation. |y + 6| = 2 what can be concluded of the equation? check all that apply. there will be one solution. there will be two solutions. the solution to –(y + 6) = 2 will be also be a solution to the given absolute value equation. the solution(s) will be the number(s) on the number line 2 units away from –6. the value of y must be positive since the variable is inside absolute value signs.

Answers: 1

continue

Mathematics, 22.06.2019 01:10, IHeartDarkSide03

Time (minutes) amount of water (gallons) practice 1. jin fills up a 510-gallon pool in the backyard for her children. she fills it with the garden hose at a rate of 17 gallons per minute. after it is filled, she lets it sit for 30 minutes in order to let the water temperature rise. the children then get in and have fun for an hour. the pool loses about 5 gallon of water each minute due to their splashing and playing. at the end of the hour, they tear the pool while getting out, which causes a leak the pool then begins to lose water at a rate of 2 gallons per minute. a. complete the table to show the amount of water in the pool after each minute. b. create a graph to model the problem situation. include when the pool will be empty. c. write a piecewise function that models this problem situation. explain your reasoning for each piece of the function. d. identify the x- and y-intercept. explain what they mean in terms of the problem situation, atamantha a cul 80 100 120 150 200 ning, inc

Answers: 3

continue

Mathematics, 22.06.2019 01:30, amanuelwold

For the functions f(x) = -922 – 2x and g(x) = -32? + 6x – 9, find (f - g)(x) and (f - ).

Answers: 1

continue

You know the right answer?

An online streaming service providing television programs claims that a 30-minute program will strea...