The length of time, x, between charges of a cellular phone is normally distributed with mean 10 hours and standard deviation of 1.25 hours. Find the chance the cell phone will last between 8 and 12 hours between charges. O A. 89.04% O B. 74.69% OC. 10.96% O D. none of these is correct

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A: Population mean, Population standard deviation, To find:

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A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: We have given that.   X~N( μ , ?^2 )   μ =0.25 , ? =0.05   Z-score =( x - μ )/?

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A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 20 The class limits for one…

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Here, µ=0°C, σ=1.00°C.

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Given data: Mean = 0.22 inches Standard deviation  = .05 inches To find: What proportion of woodlice…

Q: For a population with a mean of 75 and a standard deviation of 4, find the Z Score for an X Score of…

A: Given,population mean(μ)=75population standard deviation(σ)=4Raw score(X)=73

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 122…

A: It is an important part of statistics. It is widely used.

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A: Solution: Given information:  Let x= The pre‑exam totals  and  y= The final‑exam scores  r= 0.5…

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A: Step 1:We have given that :Mean(μ)=46500 milesStandrad deviation(σ)=6000 milesThe probability of a…

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Q: Suppose X∼Bin(12,0.65). Find the population standard deviation.   2.73 1.652 7.8 0.138 0.019

A: Given that, X follows Binomial distribution(12, 0.65) Sample size, n = 12 Probability, p = 0.65

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A: Given  mean= 598, standard deviations=34, n=4

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A: Given data,Mean is μ=170.25sd is     σ=8.47

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A: Given: Assumption:  The readings at freezing on a bundle of thermometers are normally distributed…

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A: Mean = 75Standard deviation = 8

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Q: Find the mean and standard deviation of the waiting time for counter A and B.

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Q: If E x = 5 and E x} = 51. The standard deviation is %3D Select one: O a. 11.61 O b. 3.86 O c. 14.92…

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A: GivenMean(μ)=515standard deviation(σ)=36

Q: Suppose you buy a new car whose advertised mileage is 20 miles per gallon​ (mpg). After driving your…

A: Given,mean(μ)=20standard deviation(σ)=1.02

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Solution: Let X be the readings at freezing on a batch of thermometer. From the given information, X…