Class interval (minutes)# dryer failed (frequency) 1000-1100 29 1100-1200 63 1200 - 1300 55 1300-1400 90 1400-1500 130 1500 - 1600 27 1600-1700 46 1700 - 1800 42 1800- 1900 Randomly selected hair dryers of a particular brand have been used continuously and their life-times noted in above given schedule. 4 Find the survival probability or reliability at time = 1200 Hrs Round answer to TWO decimal places.

Q: How do you solve this? There are 92 1's and 28 2's (total is 120)

A: Total sample size is Number of 1's is 92.Number of 2's is 28.

Q: mean of scores for a test = 300 SD = 100 10% of students that achieve a score higher than k are…

A: Mean()=300standard deviation()=100

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A: From the standard Normal table, the value of z for 95% level is 1.96.

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A: We have given that  For John's  mu=71,sigma=8,and X=80 And  For Melissa  mu=76,sigma=10 and X=83…

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A: Hypothesis test

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A: It is given that a total of 30 subjects are measured both before and after the intervention.Assume…

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A: S no Forecast MAPE 1 (Naive) 98.830 0.541 2 (Cum mean) 98.060 0.496 3 (5 moing) 98.606 0.559…

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A: The given variable is the ages of the participants.The observations are in increasing order as…

Q: hapter 5, Section 1, Exercise 015 (a) Find the area above 65 for a N(60,10) distribution. Round…

A: Given, X ~ N(60,10) Mean μ = 60Standard deviation σ = 10

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A: Main effect-Sex H0: There is no difference in the mean current salary based on sex.H1: There is…

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A: Given: Number of units = 200 No. of hours for normal use = 2500 one failed at = 1500 another failed…

Q: If the variance of the water temperature in a lake is 29°, how many days should the researcher…

A: Solution: From the given information, confidence level is 0.95, σ2=29 and E=4.

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A: Compute the test statistic: The investigator is specifically interested to test whether the scores…

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A: From given data we have ; Location of Injury Probability  Frequency Multiple  0.570 1021 Head…

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A: the given data is 15,13,12,18,20,19,12 arrange the data  in increasing order 12,12,13,15,18,19,20…

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A: In this case, each bin of the histogram represents 2 years.

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A: Given that  Total white car = 191 Total 0-1 = 280 Total = 719 Expected Frequency formula is E = (Row…

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A:

Q: Each period, demand for apples is normally distributed with a mean of 280 and standard deviation…

A: From the given information, For each period, Mean=280 Standard deviation=65

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A: Sketch the Normal graph of the low birth weight babies........

Q: If the variance of the water temperature in a lake is  24° , how many days should the researcher…

A: Solution: From the given information, confidence level is 0.95, σ2=24 and E=3.

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A: We have given that  John's resting pulse rate for 30 years old males . mu=71, sigma=8 and X=80 And…

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A: Given data and calculation is shown below

Q: Every year, the students at a school are given a musical aptitude test that rates them from 0 (no…

A: The data of students' musical aptitude test scores is given.Aptitude scoreFrequency031524334253To…