subject
Mathematics, 09.04.2021 02:00 ganggang6223

You are interested in finding a 90% confidence interval for the average number of names that people can correctly recall after being introduced to 40 people at a party. Based on past research, you know that the standard deviation for this number is 6.34 names. Suppose you surveyed 55 randomly selected people and found that they correctly remembered an average of 18.16 names. The standard deviation for this group was 4.28 names. Round your answers to two decimal places. A. The sampling distribution follows a distribution.

B. With 90% confidence the mean number of names that all people can remember when introduced to 40 people at a party is between and

C. If many groups of 55 randomly selected people were surveyed, then a different confidence interval would be produced for each group. About percent of these confidence intervals will contain the true population mean number of names remembered and about percent will not contain the true population mean number of names remembered.

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 13:00
Write a division equation you could use to find a, the number of miles ava is in charge of. what is the value of a? write your answer is simplist form
Answers: 1
question
Mathematics, 21.06.2019 16:20
Find the value of x for which abcd must be a parallelogram -9-6x x-30
Answers: 2
question
Mathematics, 21.06.2019 22:20
Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)
Answers: 2
question
Mathematics, 22.06.2019 00:00
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
You know the right answer?
You are interested in finding a 90% confidence interval for the average number of names that people...
Questions
question
Mathematics, 02.07.2020 19:01
Questions on the website: 13722359