Mathematics
Mathematics, 16.11.2020 17:50, tionnewilliams21

Knowing that that a particular laboratory task takes the average person 2.5 seconds (the variance is not known). A researcher was interested in whether older people are slower (take longer) on this task. The researcher tested 30 randomly selected 80-year-olds. Their mean time was 2.7 seconds, with an estimated population standard deviation of 1.4 seconds. What should the researcher conclude?

answer
Answers: 3

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 17:30, ultimateapes
Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars
Answers: 2
image
Mathematics, 21.06.2019 18:40, banditballer2
Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.
Answers: 3
image
Mathematics, 21.06.2019 20:10, Wolfy07
60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?
Answers: 2
image
Mathematics, 22.06.2019 00:20, lawrencebenoit7194
❤️ (geometry) does the construction demonstrate how to copy an angle correctly using technology a) yes; the distance between points a and f was used to create circle h b) yes; the distance between points f and g was used to create circle h c)no; the distance between points a and f was used to create circle h d) no; the distance between points f and g was used to create circle h
Answers: 2
Do you know the correct answer?
Knowing that that a particular laboratory task takes the average person 2.5 seconds (the variance is...

Questions in other subjects:

Konu
Mathematics, 31.05.2020 03:57
Konu
Mathematics, 31.05.2020 03:57