Create confidence interval for difference in probabilities

Assignment Help Basic Statistics

Reference no: EM13124917

A study performed in a Boston area high school showed a link between drinking soda and weak bones. Among 57 active children who do not drink soda, 5 suffered fractures. Among 107 active children who reported drinking soda, 38 suffered fractures. The study did not specify how much soda the children drank. (The Denver Post, 6/15/2000, "New study links cola, weak bones.")

a. Using a two-sample test of proportions, determine whether this study provides significant evidence at the 1% level to suggest that the probability of getting a fracture is lower for kids that do not drink soda than it is for kids that do drink soda.

b. Construct a 99% confidence interval for the difference in the probabilities of getting a fracture for non-cola drinking and cola drinking kids. In one or two sentences, interpret this interval for someone who has never taken a statistics course.

Reference no: EM13124917

Questions Cloud

Row operations and reduced row echelon form : Rewrite the following system of equations as an augmented matrix. Put the matrix in reduced row echelon form to find the solution to the system of equations.

What total amount of cash did risen receive : On July 1, 2007, Risen Co. issued 1500 of its 10%, $1,000 bonds at 99 plus accrued interest. The bonds are dated April 1, 2007 and mature on April 1, 2017. Interest is payable semiannually on April 1 and October 1. What total amount of cash did Ri..

Stock basis at the end of the year : Finch's taxable income for the current year is $100,000, and it distributes $200,000 to each shareholder. Betty's stock basis at the end of the year is:

Find out the cost of head lamps that would appear in each : Find out the cost of head lamps that would appear in each of the following accounts at September 30, 2011: Raw Materials, Work in Process, Finished Goods, Cost of Goods Sold, and Selling Expenses.

Create confidence interval for difference in probabilities : Construct a 99% confidence interval for the difference in the probabilities of getting a fracture for non-cola drinking and cola drinking kids.

Calculate the approximate density of bronze : Bronze is an alloy consisting of 88.0% copper and 12.0% tin. The density of copper is 9.28 g/mL and the density of tin is 7.48 g/mL. Calculate the approximate density of bronze.

Compute the five number system : Compute the five number System for this data set and list Xmin,Q1,Q2,Q3 & Xmax. See Videos and show how the pointer was computed for each quartile. (15%)

Determining the inventory turnover ratio : The following information was available for Bowyer Company at December 31, 2010: beginning inventory $90,000; ending inventory $70,000; cost of goods sold $660,000; and sales $900,000. Bowyer's inventory turnover ratio in 2010 was:

Calculate the moles of silver bromide and magnesium nitrate : Using the following equation: 2AgNO3+MgBr2->2AgBr+Mg(NO3)2 calculate the moles of silver bromide and magnesium nitrate produced by 85 mol of magnesium bromide reacting with silver nitrate.

User Account

All Pages