What is the expected number of students

Assignment Help Basic Statistics
Reference no: EM132855215

1. Suppose 6 of 15 students in a grade-school class develop influenza, whereas 20% of grade-school students nationwide develop influenza.

a. Is there evidence of an excessive number of cases in the class? That is, what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds true?

b. What is the expected number of students in the class who will develop influenza?

Reference no: EM132855215

Questions Cloud

Conduct a survey regarding worker benefits : The human resource department at a certain company wants to conduct a survey regarding worker benefits. The department has an alphabetical list
What is a potential source of bias in study : You're a wildlife biologist who wants to measure the top speed of a particular species of dragonfly. You set up a measurement apparatus in a portable wind tunne
What is the driving force of flow in ground water : what is the driving force of flow in ground water - Determine whether the materials shown below would have high or low porosity and/or permeability
Write the boolean expression : In a certain chemical-processing plant, a liquid chemical is used in a manufacturing process. The chemical is stored in three different tanks.
What is the expected number of students : What is the expected number of students in the class who will develop influenza?
What is the z-score of an 19 pound pumpkin : Pumpkins from a local farmer have a mean weight of 16 pounds with a standard deviation of 3 pounds. What is the z-score of an 19 pound pumpkin?
Find the values of mean and standard deviation : A study of the effect of television commercials on 12-year-old children measured their attention span, in seconds. The commercials were for clothes, food, and t
Point estimate for the population mean travel tax : Compute a 95% confidence interval for the mean tax paid for a three-day business trip. Round to 2 decimal places. Interpret the interval.
Calculating the standard deviation of the distribution : Assume that the heights of adult puffins are normally distributed, with a mean of µ= 16.5 inches and a standard deviation of s= 2.5 inches

Reviews

Write a Review

Basic Statistics Questions & Answers

  Formulate linear constraints to maximize abc product

Formulate linear constraints to maximize ABC's product per week. Define your decision variables, state and explain your objective and constraints clearly.

  Explain the process of factoring a trinomial

Explain the process of factoring a trinomial with a leading coefficient that is not equal to one. Why is this process more difficult than when the leading coefficient is equal to one? Give an example. How could we apply FOIL in this context?

  Stallman founded the free software foundation

When Richard Stallman founded the Free Software Foundation in 1985, he was able to tap into the energy of many programmers around the world who wanted to work on a free operating system.

  Is the distribution of the given stock prices skewed

On a certain day the average closing price of a group of stocks on the New York Stock Exchange is $35 (to the nearest dollar).

  Define the means between the control and slide groups

According to the article, a Bonferroni ranking of the three dental fear means (at a = .05) ‘‘indicated a significant difference between the mean scores.

  What is the probability that both voters are republicans

Iif two voters are randomly selected for a telephone survey, what is the probability that they are both Republicans? Round your answer to 4 decimal places.

  What was your percentile score on this test

She informs you that your z score was 1.10. What was your percentile score on this test? (enter a number only, rounded to the nearest 2 decimal places

  Verify that power is approximately .56

1. Comment on the relative merits of using a .95 confidence interval for addressing the effectiveness of the antipollution device in the previous problem.

  Determine best choice of expiration date for the green b

If. for practical reasons. you had to choose only one model to use to set the expiration dates, which would it be? (There is no health risk involved. It's a flavor quality thing.) Why would you choose this model?

  Introductory offer for the upcoming summer season

The national lottery is promoting a special, introductory offer for the upcoming summer season. Advertisements claim that, during the four scheduled summer draw

  Binomial probabilities by normal probability distribution

Which binomial probabilities can be approximated by the normal probability distribution? Explain. c) what is the probability of between 100 and 110 successes? d) What is the probability of 130 or more successes?

  What should we do if such violations exist

How can we determine whether there are violations of the ANOVA model assumptions?- What should we do if such violations exist?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd