An agency collects demographics concerning the number of people in families per household in a certain country. Assume the distribution of the number of people per household is as shown in the table to the right. P(x) 0.25 a. Calculate the expected number of people in families per household in the country. b. Compute the standard deviation of the number of people in families per household. 0.24 4 0.34 0.12 6 0.03 7 0.02 a. The expected number of people in families per household is (Type an integer or a decimal.) b. The standard deviation of the number of people in families per household is. (Type an integer or decimal rounded to four decimal places as needed.)

Q: a. Find the mean of the data summarized in the given frequency distribution. Compare the computed…

A:

Q: A population has a mean μ = 88 and a standard deviation a=7. Find the mean and standard deviation of…

A: The mean is 88 and the standard deviation is 7.

Q: In the United States, the mean birth weight for boys is 3.41 kg, with a standard deviation of 0.55…

A: From the given information, the  mean birth weight for boys is 3.41 kg and the standard deviation is…

Q: A hamburger stand sells hamburgers for $1.45 each. Daily sales have a distribution with a mean of…

A: Given: Let X be the number of hamburgers sold. E[X] = 530 sd [X] = 69 Price for each hamburger (p) =…

Q: 1. A survey by the National Retail Federation found that woman spend on average R146.21 on a…

A: Given,mean(μ)=146.21standard deviation(σ)=29.44

Q: A normal distribution of heights of adult women from a certain region has a mean of 68.7 inches and…

A:

Q: A variable x has a mean, p, of 30 and a standard deviation, o, of 5. What is the standardized…

A: From the given information,   Mean = 30 Standard deviation = 5   The objective is to find the…

Q: Financial analysts who make forecasts of stock prices are categorized as either​ "buy-side" analysts…

A: Given data:   ​Buy-Side Analysts (X) ​Sell-Side Analysts (Y) Mean μx=0.84 μy=−0.06 Standard…

Q: A population has a mean μ = 71 and a standard deviation a=18. Find the mean and standard deviation…

A: List of formulae :  Mean of sampling distribution of the sample means :  μx¯ =μ Standard deviation…

Q: Suppose that the mean weight for men 18 to 25 years old is 168 pounds, and the standard deviation is…

A: Mean = 168 Standard deviation = 23

Q: Assume scores on an exam are normally distributed with a mean of 80 and a standard deviation of 5.…

A: It is given the mean and standard deviation are 80 and 5, respectively.

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 mean finish time for a yearly amateur auto race was 185.89 minutes with a standard deviation of…

A: GivenDanMean(μ)=185.89standard deviation(σ)=0.304x=185.01sally:-Mean(μ)=112.3standard…

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

A: Given information- Population mean, µ = 0°C Population standard deviation, σ = 1°C Percentile :…

Q: A population has a mean u 90 and a standard deviation a 18. Find the mean and standard deviation of…

A: The mean is 90 and the standard deviation is 18.

Q: A population has a mean μ = 82 and a standard deviation = 24. Find the mean and standard deviation…

A: Given that the distribution is normal distribution. Mean = 82 Standard deviation = 24 Sample size =…

Q: A population has a mean μ = 72 and a standard deviation o=27. Find the mean and standard deviation…

A: Population mean=72Population standard deviation=27Sample size n=81

Q: A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations…

A: Population mean μ =26 Population standard deviation =2

Q: A normal distribution of heights of adult women from a certain region has a mean of 69.3 inches and…

A: Given  μ=69.3, σ=3  Let X be the heights of adult women. We want to find the Z score and percentile.…

Q: A population has a mean = 86 and a standard deviation a=21. Find the mean and standard deviation of…

A: Given information: The sample size is n =258. Population mean, μ=86. Population standard deviation,…

Q: 4. One year consumers spent an average of $24 on a meal at a resturant. Assume that the amount spent…

A: For variable X~N(μ,σ2), the z-score Z=X-μσ2 ; Z~N(0,1)   .... (1)where μ=population meanσ=population…

Q: a. standardized version of x. b. studentized version of x.

A: A variable has a mean of 100 and a standard deviation of 15. nine observations of this variable have…

Q: One year consumers spent an average of ​$22 on a meal at a resturant. Assume that the amount spent…

A: Determine between the two values will the middle 95% of the amounts of cash spent falls. The between…

Q: The IQ's in a certain population are normally distributed with a mean score of 104 and a standard…

A: Given, Mean =104 standard deviation =14

Q: Assume the birth weights at a local hospital have a normal distribution with a mean of 110 oz and a…

A: Let , random variable x follows normal distribution with mean μ and standard deviation σ 1) The…

Q: The revenue of a  shop is approximately normally distributed with a mean of $4500 and a standard…

A:

Q: A population has a mean μ = 70 and a standard deviation o=36. Find the mean and standard deviation…

A: Mean=70 Standard deviations=36 Sample size =81

Q: The mean July daily rainfall in Waterville is 10mm and the standard deviation is 1.5mm. Assume that…

A: Let, X = Amount of rainfall in July. Given that the data is normally distributed with mean 10mm and…

Q: ndard deviation is sample of 45 indiv

A: a) The average number of kilos of meat is 90 and SD is 10μ=90σ=10n=45b) The average number of kilos…

Q: A particular hospital's birthweight distribution is discovered to have a mean of 2700 g and a…

A: Given: μ = 2700 σ = 200 Probability = 0.95 Formula Used: According to Empirical rule 95% of the data…

Q: Assume that the Richter scale magnitudes of earthquakes are normally distributed with a mean of…

A: Given  information: μ=mean=1.157σ=standard deviation=0.532 Let us denote X as the magnitudes follows…

Q: a. Find the mean, μ = b. Find the standard deviation, σ =

A: Given: A train arrives every eight minutes. The length of time follows uniform distribution.

Q: The average number of kilos of meat a person consumes in a year is 110 kilos. Assume that the…

A: 1)GivenMean(μ)=110standard deviation(σ)=12sample size(n)=45

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.