a) In a study of the relationship between X=mean daily temperature forthe month and Y=monthly charges on electrical bill, the following datawas gathered:XYJS.2012530110509560858075yon X(1) Find the equation of regression line of monthly charges on meandaily temperature using the least squares method.(ii) Interpret the values of estimated slope and intercept.(iii) Estimate the predicted monthly charges on electricity bill if thetemperature is 40.b) A company producing television tubes guarantees that the meanlifetime for the tubes exceeds 1000 hours. To check this, a randomsample of 49 television tubes produced by the company is drawn andit shows a mean lifetime of 1200 hours and a standard deviation of100 hours.(i) Formulate the null and alternate hypotheses for the aboveproblem.(ii) Is there any evidence to support the company claim at 10%level of significance,(iii) Construct the 90% confidence interval for the mean life time oftubes.

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Answered: a) In a study of the relationship…

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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A chemistry experiment is performed measuring the solubility of potassium chloride (KCl) in water at different temperatures. The goal was to determine if there is a linear relationship between the temperature of the water and how much KCl can dissolve, measured as grams per 100 milliliter (g/100mL). After the experiments were performed, the following data was collected with temperature being the independent x-variable and solubility being the dependent y-variable: Temperature (°C) x Solubility (g/100mL) y 10 31 20 33 30 37 40 41 50 42 Based on the data given for temperature and solubility of KCl and without doing any math yet, which of the following do you predict would best describe the relationship between these variables? A positive linear relationship (r close to 1) A positive linear relationship (r close to -1) A negative linear relationship (r close to 1) A negative linear relationship (r close to -1)…
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