2 In building electronic circuitry, the breakdown voltage of diodes is an important quality char-Acteristic. The breakdown voltage of 12 diodes were recorded as follows (in volta):9.099 9.174 9.327 9.377 8.471 9.5759.514 8.928 8.800 8.920 9.913 8.306SolutionA quality engineer claimed that the variability of the breakdown voltage is not less than0.55. Can the data support the engineer's claimed at a 0.057ii. If level of significance is reduced to 0.02, will you change the conclusions you have madein (i)? Justified your answer.

2) The given data is 9.099 9.174 9.327 9.377 8.471 9.575 9.514 8.928 8.800…

Answered: 2 In building electronic circuitry, the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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(c) Assume that the resist ance of a cert ain type of resistors is normally distributed with a mean of 250 ohms and a st and ard deviat ion of 15 ohms. What percent age of the resistors of this type will have a resistance above 270 ohms?
Twenty batteries were tested to see how many hours they would last. The following grouped frequency distribution illustrates the results. Class Class Frequency Midpoint f Rel. Rel. Cummulative Cumm. Limits Boundaries Freq 1/20 = 0.05 Freq % m Freq. 1/20 = 0.05 Freq % 1- 3 0.50 – 3.5 1 4- 6 3.5 - 6.5 3 5 3/20 = 0.15 15 4/20 = 0.20 20 7-9 6.5 – 9.5 4 8 4/20 = 0.20 20 8/20 = 0.40 40 10 12 13 15 9.5 12.5 11 5/20 = 0.25 25 13/20 = 0.65 65 12.5 – 15.5 7 14 7/20 = 0.35 35 20/20 = 1.00 100 Totals 20 1.00 100 Using the data from the above grouped frequency distribution, construct a grouped frequency ogive.
Reyesburg Corporation is contemplating using a new, more expensive glue in the construction of its laminated veneer lumber. Of importance to the company is the carrying load of the lumber. The company has tested 32 beams using the new glue, recording for each beam the pressure (in pounds per square foot) at which the beam breaks. The data collected are presented in the following frequency distribution. Carrying load (in pounds per square foot) Frequency 860 to 879 4 880 to 899 9 900 to 919 12 920 to 939 4 940 to 959 3 Based on the frequency distribution, using the midpoint of each data class, estimate the mean carrying load of the beams tested. For your intermediate computations, use four or more decimal places, and round your answer to one decimal place. pounds per square foot ?
TEACHER Weatherwse is a magazine pubilished by the American Meteorological Soclety. One issue grves a rating system used to classity Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 40 waves showed an average wave height of x 16.7 feet. Previous studies of severe storms indicate that 35 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use 0.01. (a) What is the level of significance? State the nul and alternate hypotheses Hel 16.4 Ht >16.4 t Mo 16.4 t, H< 164R Ho: - 16.4 t, H 16.4 R Hot 16.4 n; H- 16.4 t H < 16.4 n; H- 164n (b) What sampling distribution will you use? Explain the rationale for your choice…
b?
An article reported the following frequencies with which ethnic characters appeared in recorded commercials that aired on Philadelphia television stations. Ethnicity: Frequency: African American USE SALT Calculate th x² = | OHP₁ P₂P, P = 0.250 H₁: at least one p, = 0.25 Asian In a recent census, the proportions for these four ethnic groups are 0.177, 0.042, 0.734, and 0.047, respectively. Does the data suggest that the proportions in commercials are different from the census proportions? Carry out a test of appropriate hypotheses using a significance level of 0.01. (Let P P₂P and p be the population proportions of the four ethnic groups (African American, Asian, Caucasian, and Hispanic respectively) appearing in commercials on Philadelphia television stations.) State the appropriate hypotheses. O H₂: P₁ = 0.047, P₂ -0.011, p = 0.330, p = 0.005 H: at least one p, P Caucasian Hispanic 330 OH: P₁ = 0.120, P, = 0.028, p = 0.840, p = 0.013 H: at least one p, * P OH₂: P₁ = 0.177, P₂ = 0.042,…
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0 - Which of the following frequency does not give information about the status of a data class in the total data? a) percent frequency B) Tuned frequency C) relative frequency D) proportional frequency TO) cumulative frequency
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