The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A sample of 64 of these smartphones is taken.

Q: your score in the original distribution?

A: Since , the original distribution has a mean 35 and standard deviation is 8 Also , the new…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A:

Q: If the average age of retirement for the entire population in a country is 60 years and the…

A: Empirical rule: The probability of the observation lies within 1 standard deviation of the mean,…

Q: If an hourglass takes an average of 1 hour to empty a full cycle, what probability of time does it…

A: Given that mean= 1 hour= 60 minutes  standard deviation = 5 minutes Let, X= time to empty a full…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: From the provided information,The population mean (µ) = 116The population standard deviation (σ) =…

Q: for this set of data, the standard deviation is equal to: 9,8,10,5,5,2,3,6,3

A: Mean:The formula for finding mean is shown below:

Q: A population data set has a mean of 81 and a standard deviation of 5.2. Find the z-scores for each…

A: Population mean, μ=81 population standard deviation, σ=5.2 The formula of z-score is, z=x-μσ…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: Given dataMean = 116Standard deviation = 14Probability that population would be between 116 and 130…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: From the provided information, Mean (µ) = 144 Standard deviation (σ) = 27 X~N (144, 27)

Q: Express the k th percentile, Pk , of a normally distributed variable in terms of its mean, μ, and…

A: The kth percentile represents the area of k to the left of z. Here, the kth percentile is calculated…

Q: A climatologist is interested in the possibility that the strength of the sun change over time. A…

A: Test is that whether the strength of the sun change overtime. Note : Since you have asked multiple…

Q: 90° or higher. To see if this data showed any evidence of climate change (and specifically global…

A:

Q: A population with a mean of µ = 15 has 40 scores. What is X?

A:

Q: In a study about the life expectancy of 200 thirty-year old males, the mean is 65 and the standard…

A: Sample size(n)=200 Mean(μ)=65 Standard deviation(σ)=10  The proportion of the males who live past 75…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Given information Mean = 116 Standard deviation = 14  between 88 and 116

Q: Researchers at the National Weather Center in Portland, Maine have recorded the number of days where…

A: Any assumption about the parameter or probability function. There is always some contention about…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: Given dataMean = 116Standard deviation = 14Probability that population would be between 88 and 102…

Q: A population has a mean of μ=50 and a standard deviation of sigma=10. a. If 3 points were added to…

A: Given: Population mean (µ) = 50 Population standard deviation (σ) = 10

Q: In a certain distribution of​ numbers, the mean is 80 with a standard deviation of 3. At least what…

A:

Q: What is meant by saying that a variable has a chi-square distribution?

A: Chi-square distribution: If the distribution of the variable has a special type of right skewed…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Obtain the standard z-score for X equals 88. The standard z-score for X equals 88 is obtained below:…

Q: Suppose that X has an exponential distribution with a mean of 35. What is P(X<7) ?

A: Given that, The provided mean is β = 35

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14 years,…

A: It is given that the mean is 14 years and standard deviation is 2.2 years. The z-score for 0.04…

Q: Given a lifetime of a bulb is 1000 hours. Assume the exponential distribution and determine the…

A: It is given that the lifetime of a bulb is 1000 hours. Thus,   Average life time (a)=1000 hλ=1a…

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed…

A: Given that, If X is normally distributed, X~N(21,7) Mean,mu = 21, Standard deviation, sigma=7 X =…

Q: An experiment involves rolling a six-sided die 480 times and recording the number of 3s. What is the…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: It is given that the population of a random variable follows normal distribution with mean 144 and…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: Given information Mean = 144 Standard deviation = 27  between 90 and 171

Q: Suppose that 35% of all adults in a population would say “good” and 65% would say “bad” if they were…

A: It is given that a sample of 1,000 adults from a population is randomly selected and the population…

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A: Let X denote the distribution of population. Given that X ~ N(mean = 116, SD = 14) Then Z = (X -…

Q: If an entire population with μ = 60 and s = 8 is transformed into z-scores, then the distribution of…

A: Given X~N(μ,σ) population mean μ=60 population standard deviation σ=8 The formula for a…

Q: The time it takes a mechanic to change the oil in a car is exponentially distributed with a mean of…

A: Given : The time it takes a mechanic to change the oil in a car is exponentially distributed with a…

Q: The length of time a person shops for groceries can be modeled by an exponential distribution with…

A: Given, Let X be the length of time. X is exponentially distributed Average= 27 mins

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36

Q: Consider this question: What is the expected number of failures in 100 launches of a rocket that has…

A: Introduction: A random variable can be said to have the geometric distribution, if it counts either…

Q: A population is normally distributed with a mean of 20.  What is the population standard deviation…

A:

Q: is 6% is your standard deviation?

A: Given according to question Sample size(N)=? Confidence =95% Margin of error = 5% Now question says…

Q: The magnitudes of earthquakes recorded in a region of North America can be modeled by an exponential…

A:

Q: A weight-loss clinic advertised that last month its patients, on average, lost 7 lb. Assuming that…

A: Here Given  Weight loss clinic advertised that last month its patients On average lost 7 lb.

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: A population has a standard deviation of 18.

Q: In a study of 400 people, the mean age is 50 years and the standard deviation of age is 10 years.…

A:

Q: For a population with mean 80 and standard deviation 10, what is the X value corresponding to z =…

A:

Q: 25. A survey found that people ke deviation is 0.56 year. If a pers

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: From the information, the mean is 116 and a standard deviation is 14.

Q: If you buy one ticket everyday for 365 days, find the mean and standard deviation for the numbers of…

A:

Q: The time to failure of a component in an electronic device has an exponential distribution with a…

A: Given :  Median = 4

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A: Answer - A Normal distribution with a mean μ = 116  and a standard deviation σ = 14…

Q: Suppose that the length of long distance phone calls, measured in minutes, is known to have an…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: From the provided information,

Q: Using the same one-tailed test (α = .05), determine if the data indicate that the past four years…

A: From provided information, the number of 90° days form a normal-shaped distribution, with a mean of…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.