Census data shows that a certain city contains close to a million families, and that these families have an average number of children per family of 2.1, with an SD of 0.9. The distribution is not normal, however, and 18% of the families have no children at all. If we take a simple random sample of 100 families, what is the chance that more than 20% in the sample have no children? Show all your work below, including the box model.

Q: Test the claim about the population mean, μ, at the given level of significance using the given…

A: GivenClaim is μ=30α=0.04standard deviation(σ)=3.13Mean(x)=28.9sample size(n)=75

Q: The regression equation is y=+x. (Round to one decimal place as needed.) Given that the systolic…

A: from given date first find mean; Mean of X =MX=∑Xn=4555=91 Mean of Y =MY=∑Xn=7775=155.4

Q: QUESTION 6 If the sample standard deviation is equal to 25.20 and the sample size is 60, what is the…

A: Given Information: Sample standard deviation s=25.20 Sample size n=60 Confidence level is 95%…

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: GivenMean(μ)=55.1standard deviation(σ)=6.1

Q: with real coefficients, in the complex plane. Find the polynomial equation and give it in its…

A: The polynomial equation is given as: y = ax2+bx+c The normal equations for solving the values of a,…

Q: A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least…

A: Given that  Population mean = 769 Sample mean = 756 Population Standard deviation = 64 Sample size =…

Q: Table 1 shows the results of the relationship between several predictors and students…

A: Given:

Q: Suppose a population has a mean weight of μ = 79.676 kg  and a standard deviation of σ=22.4943. For…

A: The mean is 79.676 and the standard deviation is 22.4943.

Q: A poll was conducted to investigate opinions about global warming. The respondents who answered yes…

A: Given  Test statistic=0.474, level of significance ɑ=0.01

Q: Football Air Pressure During the NFL's 2014 AFC championship game officials measured the air…

A:

Q: A mayor running for re-election claims that during his term, average municipal taxes have fallen by…

A: The population standard deviation is 35.

Q: A PhD student in the sociology department tries to construct a 99% confidence interval for the…

A:

Q: Diameter measurements of 15 roller bearings made by a lathe for one week showed a mean of 1.824…

A: The confidence interval for one sample mean is given by,  x̄ ± Tc. s/√n Where n= sample size, s=…

Q: A sample of 150 married women determined that 127 are happy in their marriage. A sample of 150…

A: Given that  n = 150 , X = 127 , p = 76% = 0.76

Q: before and after practice. The two groups of athletes are trained independently. The data summary is…

A: 6) Data for the football players before exercise are, n1=25,x1=254.75,s1=115.5 Soccer player before…

Q: A local chess club claims that the length of time to play a game has a standard deviation of less…

A: The claim is that the length of time to play a game has a standard deviation of less than 12…

Q: The recidivism rate for convicted sex offenders is 15%. A warden suspects that this percent is…

A: Given that Population proportion=0.15 Sample size (n)=381 Number of them repeat offender (X)=46…

Q: Lionel has just gone grocery shopping. The mean cost for each item in his bag was $3.19. He bought a…

A: Given info: The mean cost for each item in his bag was $3.19.

Q: graph has been divided into parts for visibility. mean= 2.57 median=? Grade-point averages. Find the…

A:

Q: If n=11, ¯x(x-bar)=43, and s=10, find the margin of error at a 99% confidence level Give your…

A: Given that  n=11, ¯x=43 and s=10,

Q: Which of these statements is true?   Group of answer choices The p-value is determined by the test…

A: It is given that.  Comparison between p-value and test statistic.

Q: Driving A research team studied the relationship between light alcohol consumption and driving when…

A: The provided data are as follows: n1=31n2=31x1=32x2=18s1=3.7s2=2.9

Q: population standard deviation is equal to 7.68 and the sample size is 117, what is the margin of…

A: Given S=7.68 n=117

Q: Total 155 345 Total 500 Compute the relative frequency of the given event if an author as specified…

A: Given data table..  We have to find out given probability

Q: The length of time Y, in minutes, required to generate a human reflex to tear gas has the density…

A: Given that

Q: Find the critical value(s) and rejection region(s) for the indicated t-test, level of significance…

A: The value of α is 0.10 and the sample size n is 13.

Q: The age of children in kindergarten on the first day of school is uniformly distributed between 4.79…

A: From the provided information, Mean (µ) = 4.79 Standard deviation (σ) = 5.81 X~N (4.79, 5.81) Here X…

Q: A box contains 70% of tickets labeled 1 and 30% of tickets labeled 0. We draw 500 times with…

A: Given that   A box contains 70% of tickets labeled 1 and 30% of tickets labeled 0.   We draw 500…

Q: The expected value without sample information is 10. The expected value with perfect information is…

A: Given data The expected value without sample information is 10 The expected value with perfect…

Q: Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of…

A: Given that Sample size (n)=2255 The number of US adults use internet regularly=1787 The number of US…

Q: A company claims that the mean monthly residential electricity consumption in a certain region is…

A: According to the given information in this question We need to find critical value and conclusion

Q: large population, 59% of the people have been vaccinated. If 3 people are randomly selected, what is…

A: Given that,           n=3           p=59%p=0.59 From the given information, the distribution is…

Q: Perform a chi-square independence test, provided the conditions for using the test are met.…

A: Given that,  Claim : Depression and BMD in elderly men are statistically dependent.

Q: A high school baseball player has a 0.231 batting average. In one game, he gets 9 at bats. What is…

A: A high school baseball player has a 0.231 batting average it means that they'll get a hit in any one…

Q: Several local universities hire a polling company to study how wide spread cheating is in online…

A: The objective is to match the type of bias this challenge would make us worry about the most.

Q: The map below shows the percentage change in housing prices from June 2014 to June 2015 in each of…

A: We are given the percentage change in housing prices from June 2014 to June 2015 for the nine…

Q: Test the claim about the population mean, μ, at the given level of significance using the given…

A: We have given that. Population mean (µ) = 30Standard deviations (σ) = 3.13Sample size (n) = 75Sample…

Q: There are different guidelines for calcium intake for children age 5-10 those aged 11-13. A study…

A: State the hypotheses. Null hypothesis: H0: pl–p2=0 Alternative hypothesis: H1: pl–p2≠0

Q: Let X₁ a random variable with expected value (mean) E(X) = 17 and variance V(X) = 12. Let Xz another…

A: As per our guidelines I can solve only first 3 subparts. Post the remaining subparts again and…

Q: A high school baseball player has a 0.302 batting average. In one game, he gets 8 at bats. What is…

A: Solution: Let X represent the number of hits made by player in the game.  The baseball player has a…

Q: Number of Alarms 32

A: Given,

Q: If the regression line is y = -2.3x + 4.5 and there is correlation in the population what is true?…

A: Given  Regression line equation  y = -2.3x + 4.5

Q: If n=30, ¯xx¯(x-bar)=49, and s=4, find the margin of error at a 99% confidence level Give your…

A: Given,n=30x¯=49s=4degrees of freedom(df)=n-1df=30-1=29α=1-0.99=0.01α2=0.005t0.005(29)=2.756…

Q: Suppose that a researcher obtains a correlation of r equals 0.60 for a sample of n equals 10…

A:

Q: Media researchers report the average daily TV viewing time for U.S. adult males to be 4.28 hours.…

A: Given: average(μ)=4.28standard deviation(σ)=1.30 X follows normal distribution

Q: Calculate the range, population variants, and population standard deviation for the following…

A: Given data set is7,11,16,9,19,12,5,17,16,13sample size(n)=10

Q: A pair of dice is rolled 500 times and we observe the following frequencies for the sum on the faces…

A:

Q: ress the confidence interval (30%,43.2%)(30%,43.2%) in the form of ˆp±MEp^±ME. ___% ± ___%

A: Given Confidence interval is (30%,43.2%)Lower limit=30%Upper limit=43.2%Express in form of p±E

Q: Test the independence of the two variables in the table below: Enter the test statistic (to 4…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: GivenConfidence level=99%Margin of error(E)=2%=0.02