Answered: The number of bacterial colonies on a…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

See similar textbooks

Related questions

Question

b) The number of bacterial colonies on a petri dish can has an average of 2.5 per cm2. i. Define the variable of interest for this scenario. ii.What probability distribution do you think best describes the situation? Why? iii.Calculate the mean and standard deviation of the distribution Find the probability that a) in 1 cm2 there are no bacterial colonies . B) in 4 cm2 there are more than three bacterial colonies. A college principal decides to consult the students about a proposed change in the time of lectures. She finds that out of a random sample of 80 students, 57 are in favour of the change. i. Calculate a 95 % confidence interval for the proportion of students who are not in favour of the change. ii. State the effect on the width of such a confidence larval when the confidence level is increased.

Expert Solution

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Follow-up Questions

Read through expert solutions to related follow-up questions below.

Follow-up Question

A college principal decides to consult the students about a proposed change in the time of lectures. She finds that out of a random sample of 80 students, 57 are in favour of the change. Calculate a 95 % confidence interval for the proportion of students who are not in favour of the change. State the effect on the width of such a confidence larval when the confidence level is
increased.

Solution