A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random sample of 175 machines is taken, and 35 of the machines in thesample malfunction. Based upon this, compute a 90% confidence interval for the proportion of all X-ray machines that malfunction. Then find the lower limit andupper limit of the 90% confidence interval.Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. (If necessary, consult a list of formulas.)Lower limit:Upper limit: ||

Given,n=175x=35p^=xnp^=35175=0.21-p^=1-0.2=0.8α=1-0.90=0.1α2=0.05Z0.05=1.645 (from Z-table)

Answered: A researcher wishes to estimate the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Suppose that 243 out of a random sample of 325 letters mailed in the United States were delivered the day after they were mailed. Based on this, compute a 95% confidence interval for the proportion of all letters mailed in the United States that were delivered the day after they were mailed. Then find the lower limit and upper limit of the 95% confidence interval.

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