In a frequency distribution, the mid value of the first class is 10 and each class has equal class intervals. The cumulative frequencies of the classes are 3, 18, 37, 40 and 45. Give the original frequency distribution and find its mean.

Q: An Internet provider is trying to gain advertising deals and claims that the mean time the…

A: Given information- Population mean, µ = 39 minutes We have given that an internet provider is trying…

Q: In response to a complaint that a particular tax assessor (1) was biased, an experiment was…

A: we get all answer from output.

Q: 2. The College Board reports that in 2017, the mean math score was 544 and the standard deviation…

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Q: What are four main functions of statistics?

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Q: Cell Phone Call Lengths The average local cell phone call length was reported to be 2.32 minutes. A…

A: The following information has been provided: The population mean is μ=2.32. The sample size is n=23.…

Q: The "Freshman 15" refers to the belief that college students gain 15 lb (or 6.8 kg) during their…

A: Given that, The sample data is given as: September April 73 75 75 82 57 58…

Q: A newspaper published an article about a study in which researchers subjected laboratory gloves to…

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Q: In a random sample of twelve people, the mean driving distance to work was 18.9 miles and the…

A: given data sample size (n) = 12sample mean ( x¯ ) = 18.9sample standard deviatio (s) = 6.395% ci for…

Q: Construct 95% confidence for the population point estimate (sample proportion) which is given as…

A: Given  N=40, P=0.4  Level of significance=0.05

Q: Example 1.5 A family has two children. What is the conditional probability that both are boys given…

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Q: Undergraduate GPAs It is desired to estimate the mean GPA of each undergraduate class at a large…

A: GivenMargin of error(E)=0.21standard deviation(σ)=1.27Confidence level=90%

Q: Find the monthly payment R needed to have a sinking fund accumulate the future value A. The yearly…

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Q: The normal curve (also called a bell-shaped curve, or bell curve) is a visual representation of a…

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Q: A population has a mean μ = 130 and a standard deviation o =26. Find the mean and standard deviation…

A: Given that  Population mean (μ) = 130 Population standard deviation (σ) = 26 Sample size (n) = 52…

Q: The data table contains waiting times of customers at a bank, where customers enter a single waiting…

A: Followings are the Explanation of the question Calculate the Sample standard deviation for the given…

Q: You are interested in finding a 90% confidence interval for the average commute that non-residential…

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Q: A researcher wants to know if the average age of hospital patients is over the reported value of…

A: 1. Suppose μ is the population average age of hospital patients.

Q: Q. 32 If G, is the geometric mean of n, observations X₁, X₂, X, and G₂ is the geometric mean of…

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Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.6 and a standard…

A: From the provided information, Mean (µ) = 100.6 Standard deviation (σ) = 16.6 X~N (100.6, 16.6)

Q: biologist needs to estimate the weight of all spiny lobsters on the Treasure Coast. To achieve this,…

A: Given n=20 Alpha=0.01

Q: A child dying from an accidental poisoning is a terrible incident. Is it more likely that a male…

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Q: I'm stuck in my homework question. Do I use a sample size formula paired samples for the following…

A: Given the value of μd=-0.57 and standard deviation, sd=0.86. The values of α=0.05  and the…

Q: In a random sample of males, it was found that 22 write with their left hands and 220 do not. In a…

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Q: When women were finally allowed to become pilots of fighter jets, engineers needed to redesign the…

A: Given that  Mean = 162 , Standard deviation = 44 P(150 < X < 221)

Q: A chemical engineer is interested in determining whether a certain trace impurity is present in a…

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Q: The following are the returns ($) for two stocks. Which stock would you choose and why? B Expected…

A: Here, means are equal and standard deviations are different, A has 30 and B has 40.

Q: Two brother X and Y appeared for an exam. The probability of selection of X is 1/7 and that of B is…

A:

Q: A box contains 10 bulbs, of which just three are defective. If a random sample of five bulbs is…

A: Given,no.of defective bulbs=3no.of non defective bulbs=7Total no.of bulbs=10

Q: Before every flight, the pilot must verify that the total weight of the load is less than the…

A: Givensample size(n)=39Mean(μ)=182.3 lbstandard deviation(σ)=39.6 lbThe aircraft will be overloaded…

Q: Use the t-distribution to find a confidence interval for a difference in means μ₁ - ₂ given the…

A: given data  given data x¯1  = 78.5s1 = 12.0n1 = 25x¯2  = 63.0s2 = 7.9n2 = 2090% ci for μ1-μ2.α =…

Q: A simple random sample of size n is drawn from a population that is normally distributed. the sample…

A: The sample mean is 108 and sample standard deviation is 10.

Q: There are two roads from A to B and two roads from B to C. Each of the four roads is blocked by snow…

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Q: The mean number of minutes for app engagement by a tablet user is 8.2 minutes. Suppose the standard…

A: Given that Population mean=8.2 minutes Standard deviation =1 minute  Then we have to find a... What…

Q: .  Can you populate the table in the attached image?  Thanks

A: There are many statistical tools used to estimate the relationship between variables: 1…

Q: Starting at a fixed time, each car entering an intersection is observed to see whether it turns left…

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Q: Internet Visits A U.S. Web Usage Snapshot indicated a monthly average of 36 Internet visits a…

A: given data  n = 29x¯ = 37.5s = 5.3α = 0.10claim : μ≠36

Q: Example 8.11 For a class project, a political science student at a large university wants to…

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Q: Given in the table are the BMI statistics for random samples of men and women. Assume that the two…

A: Given that:   Male BMI Female BMI μ μ1 μ2 n 41 41 x¯ 27.8361 25.2703 s 8.615006 4.560128…

Q: psychologist would like to estimate the proportion of Americans that say "the future of the nation…

A: Given that  n = 784 , p = 59.3% = 0.593 96% confidence interval

Q: Example 2.9 Suppose that a particular trait of a person (such as eye color or left handedness) is…

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Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1386…

A: The question is about hypo. testing and confidence interval Given : No. referee calls charged by men…

Q: 50 tickets numbered : A bag contains 1,2,3,4......50 of which five are drawn at random and arranged…

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Q: Safeway puts out hundreds of turkeys in the weeks before Thanksgiving each year. Each weight varies…

A: given data  μ = 15σ = 1.4Z = 1.2; x = ?

Q: A water taxi carries passengers from harbor to another. Assume that weights of passengers are…

A: given data μ = 180σ = 45normal distribution n=25limit : ∑x ≤3500

Q: The Chamber of Commerce in a Canadian city has conducted an evaluation of 300 restaurants in its…

A: The distribution for quality rating x and meal price y is displayed below. Divide all the values by…

Q: A college football coach records the mean weight that his players can bench press as 275 pounds,…

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Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of 61 subjects went on…

A: given data x¯1  = 2.1s1 = 4.71n1 = 61x¯2 =3.7s2 = 5.67n2 = 63α = 0.05claim : μ1 < μ2

Q: EXAMPLE 6.41 Find queue length of the system if λ = 12 per hour, μ = 4 per hour, Po= 0.0313, and c =…

A: Find queue length of the system if  λ= 12 per hour. μ = 4 per hour. P0= 0.0313 and  c = 4

Q: X; Y₁ Use Sy* = 1 2 3 4 7 + لیا Jse Spred = S√ 1 + 4 6 11 15 (x*- x)² Σ(x, − x)2 n 5 Use ŷ* ± ta/25*…

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Q: Q. 32 If G, is the geometric mean of n, observations and G₂ is the geometric mean of n₂ X₁X₂X₁…

A: Given  G1 be the geometric mean of n1 observation G2 be the geometric mean of n2 observation G be…