in a city a,20% of a random sample of a 900 school boys had a slight certain physical defect. in another city b,18.5% of a random sample of 1600 school boys had the same defect.is the difference between the proportions is significant?

Q: In a comparative study of two new drugs, A and B, 275 patients were treated with drug A, and 400…

A:

Q: For samples selected from a population with µ = 100 and σ = 15, which of the following has the…

A: As the sample size increases the standard error of the mean will become smaller. Given; μ=100σ=15

Q: Is achieving a basic skill level related to the location of the school? The results of a random…

A: Test is that whether Skill level in a subject is independent of location. Level of significance =…

Q: Among students at a nearby college, the proportion who say they're interested in their congressional…

A: Given : n=275 , X=210 , p0=0.75 , α=0.05 Here , we want to test the claim that the proportion at the…

Q: Suppose in a tournament with only three players left, first place receives $6,000, second place…

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Q: A company that manufactures televisions of three different sizes. If you know that this The company…

A: Chi square χ2 test: Chi square χ2 test is useful to test the significant relation between the two…

Q: 2. For a population with u = 80 and o = 6, what is the z-score corresponding to X= 68?

A: The mean is 80 and the standard deviation is 6.

Q: 2 A college surveyed 1125 freshman students about which meals they ate in the school cafeteria. The…

A: Given number of freshman students who Ate only breakfast=25 Ate only lunch =15 Ate only diner = 50…

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A: Obtain the 90% confidence interval for the difference in proportions of clothes that receive a…

Q: An independent-measures research study compares three treatment conditions using a sample of n = 10…

A: Given, SSbetween=?

Q: A study claims that the combination of vitamin C with vitamin E is more effective for preventing the…

A: Given : Group 1 No of subjects = 410 Vitamin C dose = 600 mg Vitamin E dose = 0 Group 2 No of…

Q: At the Blood Bank, they know that O+ blood is the most common blood type and that 40% of the people…

A: Given: p=40%=0.40 for O+ (X)p=6% = 0.06 for A- (Y)p=50% = 0.50 for A or B (Z)

Q: It is not exposed to the factor under consideration and all other external influences are held…

A: When a treatment is applied to a group and results are obtained after the treatment, then the method…

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Q: An independent-measures study is analyzed using the appropriate t-test, and the APA summary is t(56)…

A: Given: t(56) = 3.19, p < .01, d = 0.32

Q: To determine the effectiveness of an oil additive, a testing firm purchased two cars of the same…

A:

Q: At the Blood Bank, they know that O+ blood is the most common blood type and that 40% of the people…

A: Solution: Define the notations X represent the number of people who have blood type O+ Y represent…

Q: In the course of her investigation, Sloan is also interested in whether customers would purchase a…

A: Probability is the chances of occurrence of an event and it can take values from 0 to 1. The…

Q: Among students at a nearby college, the proportion who say they're interested in their congressional…

A:

Q: To determine the effectiveness of an oil additive, a testing firm purchased two cars of the same…

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Q: A sample of n = 64 individuals is selected from a population with µ = 50 and σ = 12, and a treatment…

A: Formula : Cohen's d : d = (M-µ) /σ

Q: n a city A 20% of a random sample of 900 school boys had a certain slight physical defect. In…

A: Given n1=900n2=1600

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A: received meditation  received sugar pills Total Patient cured Observed value(O) 70 20 90…

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Q: receive a rating of 7 or higher. For detergent A, 228 pieces of clothing received a 7 or higher. For…

A: Find z =? p value =?

Q: When random samples are drawn so that the selection of a case for one sample has no effect on the…

A:

Q: Suppose 50 percent of the customers at Pizza Palooza order a square pizza, 72 percent order a soft…

A: Given information- Percentage of the customers order a square pizza = 0.50 Percentage of customers…

Q: An independent-measures research study compares three treatment conditions using a sample of n = 5…

A: In this case, there are three treatments and each of the sample has size 5.

Q: A sample, with M=42 and n=64, is selected from a population with a μ=48 and σ=16.  Would this sample…

A: If the sample size is larger and the difference between sample mean and the population mean is…

Q: (0.91-0.84) 1.96, 0.91(1-0.91) 0.84(1- 0.84) + 250 250 O (0.91-0.84) ±1.65, 0.91(1-0.91) 0.84(1…

A:

Q: It was found in the production of one of the factories that out of 1000 production units there are…

A: Given that  1000 production units has 150 defective units . P(Defective) = 1501000=0.150 P = 0.15  ;…

Q: A sample from a normal population with u=50 and o =6 has a mean of M =48.20.If the sample mean…

A: Given,mean(μ)=50standard deviation(σ)=6sample mean(M)=48.20z-score =-1.50

Q: In a previous​ poll, 42​% of adults with children under the age of 18 reported that their family ate…

A:

Q: Among students at a nearby college, the proportion who say they're interested in their congressional…

A:

Q: By how much must the sample size n be increased if the width of the CI (7.5) is to be halved? If the…

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Q: 1) Does taking an aspirin a day help reduce migraine frequency? In a study of 180 volunteers of…

A: (a) An experiment is a procedure that is conducted to know about the cause and effect relationship…

Q: A sample of n=16 scores is selected froma normal population with μ=56 and σ=20. What is the…

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Q: With 0.05 significance level, H1: p > 0.5, and the value of test statistics is z = 1.25. Then

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Q: In two towns A and B, the following information was supplied by an investigator. Total population…

A: Solution :    Let A denote the literates    therefore , α denote illiterates    Let B denote…

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Q: A pharmaceutical company has developed a new drug to help relieve acid reflux. However, as with all…

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Q: (b) The state of Wisconsin would like to understand the fraction of its adult residents that…

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Q: From historical data at a local restaurant indicate that 60% of the customers order coffee, 15%…

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Q: An experiment was performed to attempt to answer the question of interest posed in Question 12. In…

A: Formula: x¯split-x¯individual±tn1+n2-2,αsp21n1+1n2Here,sp2=n1-1ssplit2+n2-1sindividual2n1+n2-2…

Q: A study found that 1 out of 200 adult males have green eyes. If a random sample of 400 adult males…

A: The sampling distribution of p-hat(sample proportion) is approximately normal with mean p and…

Q: For a population with μ = 50 and σ = 18, the distribution of sample means based on n = 9 will have a…

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Q: A company claims that its brand of dish detergent, A, is more effective than a competitor’s brand,…

A: The correct inferential procedure for a test is dependent on multiple considerations.

Q: A laundry detergent company wants to determine if a new formula of detergent, A, cleans better than…

A:

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.