Find a 90 confidence interval for the true proportion of

Reference no: EM13642503

Tthe Federal Trade Commission (FTC) conducted a study in 1998 of checkout scanners. The FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned price was accurate. The FTC gave a store a passing grade if 98% or more of the items are priced correctly. Of the 1,669 stores in the study, 1,185 passed inspection.

a. Find a 90% Confidence Interval for the true proportion of retail stores and supermarkets with electronic scanners that pass the FTC price-check test. Interpret the result.

b. In 1996, the FTC found that 45% of the stores passed inspection. Use the interval in part a. to determine whether the proportion of stores that pass inspection in 1998 exceeds .45.

Reference no: EM13642503

Questions Cloud

Develop a formulation of linear programming to identify the : a company excavates gold and silver from 2 different mines. each hour that the company operates in mine 1 produces 2 kg

Suppose a spacecraft is sent to study an object somewhere : suppose a spacecraft is sent to study an object somewhere in our milky way galaxy. this spacecraft finds out that the

In its brochure to customers that is required by the safe : in its brochure to customers that is required by the safe drinking water act a water utility lists the concentration of

In how many ways can a student answer an 8-question : in how many ways can a student answer an 8-question true-false examination if he marks half the questions true and half

Find a 90 confidence interval for the true proportion of : tthe federal trade commission ftc conducted a study in 1998 of checkout scanners. the ftc inspected 1669 scanners at

It takes 1000 ml of sodium hydroxide aq to titrate 6216 g : it takes 10.00 ml of sodium hydroxide aq to titrate 6.216 g of khp hkc8h404 in water m.w.khp 204.32gmol to the

A vector has an x component of -215 units and a y component : a vector has an x component of -21.5 units and a y component of 41.5 units. find the magnitude and direction of the

Calculate the magnitude of the net force on each due to the : three charged particles are placed at the corners of an equilateral triangle of side 1.20. the charges are q1 6.7uc q2

The chart below shows the numbers of endangered and : the chart below shows the numbers of endangered and threatened species both here in the united states and

User Account

All Pages