Suppose the talk time on a certain cell phone battery is approximately normally distributed with a mean of 350 minutes and a standard deviation of 22 minutes. a. What proportion of fully charged batteries will last at least 5 hours? Round as a percent to 6 decimal places

Q: The distribution of the IQ (Intelligence Quotient) is approximately normal in shape with a mean of…

A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

Q: Assume that at the average age of a population of wild turtles is normally distributed with mean age…

A:

Q: If the average weight for cats is 12 pounds and the standard deviation is 2 pounds. 68 percent of…

A: Given data: If average weight for cats = 12 pounds standard deviation = 2 pounds. To find: 68% of…

Q: Assume that weights of men are normally distributed with a mean of 160 pounds and a standard…

A: Given, Weights of men follows normal distribution with mean 160 pounds and standard deviation 25…

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 79 mph and…

A: It is given that the speeds in which cars go on the freeway has a normal distribution with mean 79…

Q: The average charitable contribution itemized per income tax return in Pennsylvania is $792 Suppose…

A: Let the random variable X denote the charitable contribution itemized per income tax return in…

Q: Suppose that the speeds of cars travelling on California freeways are normally distributed with a…

A: Provided information is: The speeds of cars travelling on California freeways are normally…

Q: In a normal distribution of measurements having a mean of 200 pound standard deviation of 30 pounds,…

A: GivenMean(μ)=200standard deviation(σ)=30

Q: Cars on I-40 have a mean speed of 73 MPH at a certain mile marker, with a standard deviation of 8…

A: Let X = speed of the car. X~N73, 82 To calculate P[70<X<75]. So,…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

Q: The upper 50% of the data on this graph is within how many standard deviations from the mean?…

A: Given graph: The histogram indicates the distribution is approximately normally distributed.

Q: Assume that women's heights are normally distributed with mean 64.2 inches and standard deviation…

A: Let X be the women's heights which follows normal distribution with mean 64.2 inches and standard…

Q: A math class completes an exam and it is found that the class mean is 85 and the standard deviation…

A: The Chebyshev's theorem and Empirical rule is use to calculate the proportion or percentages of…

Q: Sacks of grain have an average weight of 120 Kilograms. It is found that 10% of the bags are over…

A: Let X denote the weight of sacks of grain. Given that X follows N(mean = 120, SD), then Z = (X -…

Q: find the mean, standard deviation, the IQR, and tell how the data is skewed, if it is. using the…

A: If the distribution is divided into two parts and the two sides are a mirror image of each other,…

Q: A statistician uses Chebyshev's Theorem to estimate that at least 90 % of a population lies between…

A: We have to find correct answer for given data..

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are: Interval…

A: According to the given data, first form the following table:IntervalFrequency(fi)Midpoint(xi…

Q: 3. The amount dispensed by the coffee machine follow the normal distribution with a mean of 5,286…

A:

Q: Human pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15…

A: The mean is 267 days and the standard deviation is 15 days.

Q: Overweight Men For a random sample of 60 overweight men, the mean of the number of pounds that they…

A: From the provided information, Sample size (n) = 60 Sample mean (x̄) = 31 pounds Standard deviation…

Q: The amount that households pay service providers for access to the Internet varies quite a bit, but…

A: We have given that  We have given that.   X~N( μ , ?^2 )   μ =48 , ? =20 , n=500

Q: The life span in Honolulu is approximately normally distributed. The mean life span is 77 years. A…

A:

Q: Calculate the following for the given frequency distribution: Data Frequency 50 −- 53 12 54 −- 57…

A: The question is about frequency distribution Given :   To find : 1 ) Popl. mean 2 ) Popl. std.…

Q: Suppose that the speeds of cars travelling on California freeways are normally distributed with a…

A: Given Information :  Suppose that the speeds of cars travelling on California freeways are normally…

Q: The indicated IQ score, x, is (R

A: here mean = 100 standard deviation  = 15  X = IQ score

Q: HumanPregnancy Norm STEM Assume that the length of human pregnancies from conception to birth varies…

A: Mean(µ) = 266 Standard deviations (σ) = 16 X ~ N (µ, σ )= N ( 266,16)

Q: A quantitative data set has mean 19 and standard deviation 4. Approximately what percentage of the…

A: The known values are, The formula for calculating the value of k is, The values of k are,

Q: Suppose that replacement times for washing machines are normally distributed with a mean of 8.8…

A:

Q: Scores had a Mean of 82 and a Standard Deviation of 5 0. Find a z score for x =81 and x = 68 Z-…

A:

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…