Calculate the mean and the standard deviation of the probability distribution using a TI-83, TI-83 Plus, or TI-84 graphing calculator.

Q: A study has shown that the probability distribution of X, the number of customers in line (including…

A: The formula of Standard deviation is,

Q: Table 4 is the probability table for a random variable X. Find E(X), Var(X), and the standard…

A:

Q: Human body temperatures are normally distributed with a mean of 98.2 degrees and a standard…

A: Solution

Q: Let x be a random variable representing the length of trout in a lake.  A friend claims that the…

A: We have given that,  Sample mean length (x̄) = 19.4 and sample standard deviation (s) = 3.8 and…

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: Let X be the salaries for teachers in a particular elementary school district are normally…

Q: An insurance salesperson sells an average of 4.90 policies per day. Let x denote the number of…

A:

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.38​%. A random sample of 32 of…

A: The probability of the mean childhood asthma prevalence for the sample is greater than 2.7​% is…

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.33​%. A random sample of 30 of…

A: Let "M" be the mean childhood asthma prevalence. Where,

Q: the probability for the number of sales calls completed per day by a number of sales people is given…

A: Given X 0 1 2 3 4 Px 116 416 616 416 116

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.36%. A random sample of 34 of…

A: Given thatMean,       μ=2.36% ,   sample size, n=34standard deviation,  σ=1.34%,     x=2.7%

Q: 10. A study has shown 38% of adults have purchased a product online. A random sample of 250 adults…

A:

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.22​%. A random sample of 30 of…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Five males with a particular genetic disorder have one child each. The random variable x is the…

A: If the total probability is equal to 1, the probabilities are in between 0 and 1 and the variable is…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A: Let "X" be the IQ score of the adults.

Q: What is the standard deviation of the he final exam grade distribution for all students in the…

A: Given grade (x) probability (p)  x*p x2  x2 *p 0 0.03 0 0 0 1 0.08 0.08 1 0.08 2 0.17 0.34…

Q: The population mean annual salary for an electrician is $46,700.A random sample of 42 electricians…

A:

Q: Five males with a particular genetic disorder have one child each. The random variable x is the…

A: Obtain the value of the mean of the random variable X. The value of the mean of the random variable…

Q: Assume that the probability of a being bor sample of 1168 volunteers. Find the most likely number of…

A: Solution

Q: The probability that a randomly selected adult has an IQ less than 128 is (Type an integer or…

A: Given:  Consider X as a random variable that follows a normal distribution with mean 22 and…

Q: In a hamster breeder's experience the number X of live pups in a litter has the following…

A:

Q: Find the variance of a binomial distribution when p = 73% and n = 205. (

A: Note :- Variance=np(1-p) in our question Given that p=73%=.73 And n=205 So

Q: Complete the table below and find the variance and standard deviation of the ff. probability…

A: Given: x P(x) 1 3/10 2 1/10 3 2/10 4 2/10 25 2/10

Q: A grocery​ store's receipts show that Sunday customer purchases have a skewed distribution with a…

A: From the provided information, Mean (µ) =29 Standard deviation (σ) = 21 Sample size (n) = 307 For…

Q: The probability is 0.3 that a traffic fatality involves an intoxicated or​ alcohol-impaired driver…

A: Probability, Sample size,

Q: Yearly amounts of black carbon emissions from cars in India are normally distributed with mean 14.7…

A:

Q: Dandelions are studied for their effects on crop production and lawn growth. In one region, the mean…

A:

Q: In one region, the September energy consumption levels for single-family homes are found to be…

A: given  data normal distributionμ = 1050σ = 218n = 50p ( x¯ > 1075) = ?

Q: Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are…

A: Given information- Population mean, µ = $12,837 per year Population standard deviation, σ = $1500…

Q: Service time for a customer coming through a checkout counter in a retail store is a random variable…

A: Solution σ1=σ2=0.5μ1=μ2=3.5n1=21n2=28

Q: The months of July to October are considered rainy season in the Philippines as multiple weather…

A: E(X)=∑ixi p(xi)E(X)=0×0.12+(1×0.20)+(2×0.33)+(3×0.25)+(4×0.10)E(X)=0+0.20+0.66+0.75+0.4E(X)=2.01

Q: Determine the probability that the revenue from the bar exceeded R1 300 on a particular day. A…

A: Given that  X~Normal ( μ = 424 , σ = 144 ) X=Revenue from bar

Q: The mean percent of childhood asthma prevalence in 43 cities is 2.08​%. A random sample of 32 of…

A:

Q: (b) What is the probability that the sample mean is within 1 inch of the population mean for…

A: The state of California has a mean annual rainfall of 22 inches, whereas the state of New York has a…

Q: Use the fact that the mean of a geometric distribution is u and the variance is o A daily number…

A:

Q: The amount of rain falling in Waimea Canyon State Park, Kauai is normally distributed with a mean of…

A:

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: Given data,μ=0σ=1P(1<X<2.25)=?

Q: Find the indicated probability and interpret the result.   From 1975 through​ 2020, the mean annual…

A: The given values are:Population mean (μ) = 651Sample size (n) = 32Population standard deviation (σ)…

Q: Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are…

A: Given that ; μ = $ 12837 ? = $ 1500 X = $ 17000 To find P( x < 17000) =  ? ?  P( x > 17000) =…

Q: Find the indicated probability and interpret the result.   From 1975 through​ 2020, the mean annual…

A: The problem provides us with the following values:Population mean (μ) = 651Sample size (n) =…

Q: standard

A: Given: Mean, μ=80 Standard deviation, σ=7 Sample size, n=49 To find: P (X>82) Using normal…

Q: The histogram shows the distribution of hurricanes that have hit a country from 1851 through 2015,…

A: From the given histogram, the deduced table is as follows: xp10.41620.27430.21340.08550.012