A random sample of students who completed the Census at a school survey was selected. Of the 227 in the sample, 84 reported that they had allergies.  Find the critical value z*(always positive) for a 95% confidence level.

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A: Poison distribution used only, If a problem contains the average value for happening of an event per...

Q: Illustration 12.25 Trend equation for yearly sales (in '000 R$) for a commodity with year 1979 as or...

A:

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A: A one-sample t-test is a statistical method that can be used to see if an unknown population mean va...

Q: llustration 12.24. The sales of a company for the last eight years are given as: Year: 1973 1974 197...

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Q: 1. In how many ways may 4 people be seated in a row of 10 chairs? 2. In how many ways can a point gu...

A: HERE use permutation and combination 

Q: n. How large of a sample size is required?

A: here MOE  = 0.03 p =0.28 z critical for 95% confidence level = 1.96 s

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A: GivenThe age of the winner for best actor was 28 withMean(μ)=42.3standard deviation(σ)=8.4The age of...

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A:

Q: Activity 1 The following are the age (in years) and systolic blood pressure of 20 apparently healthy...

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A: Solution is given:

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A: Here We will use Properties of Hypothesis 

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Q: 18. The following data pertaining to the number of members in a family. Find median of the family.

A: It is known that Median = middle value of sorted data = (n + 1)/2 th observation To find (n + 1)/2 t...

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Q: Use the confidence interval to find the estimated margin of error. Then find the sample mean.

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A: Here AS per policy I have calculated first main question  Here check condition for binomial theorem 

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Q: 6. A measles outbreak has occurred in Barangay Onik. The head doctor in the barangay plans to conduc...

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Q: End-of-Chapter Problems: Chapter 05 z-Scores: Location of Scores and Standardized Distributions For ...

A: Givenx=85Mean(μ)=75standard deviation(σ)=15

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Q: A true-false test contains 24 questions. In how many different ways can this test be completed? (Ass...

A: Given,Total no.of questions=24

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Q: This is the weight of 50 samples that were collected. Using seven classes, create a group of frequen...

A: From the above data the given values are  136 92 115 121 137 132 120 104 125 118 119 115 101 82 108 ...

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A: Given The data is as follows: Birth of boys and girls are equally likely.

Q: Calculate the coefficient of correlation between X and Y from the following data and calculate proba...

A: The table shows X and Y values.  

Q: He can wear ?  different outfits.

A: Juan owns 1 pairs of pants, 5 shirts, 4 ties, and 1 jackets. 

Q: Suppose Y, and Y, are random variables with joint pdf (6(1– y2), 0 < y1 < y2 0, otherwise Let U1 and...

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Q: A researcher surveys 50 individuals in the North Ward of Thunder Bay, and 40 in the South Ward, and ...

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Q: 10. Mingming, Mark's cat, recently got pregnant and is expecting 6 cubs according on her doctor. Mar...

A: Here p- value = 0.056  Level of significance = 4% = 0.04 As p-value &gt; 0.04, hence we accept null ...

Q: he table below shows how students performed based in their gender. Use the table to answer the fol...

A: P ( A or female ) = ? P ( D/ Male ) =?

Q: Question: IQ scores are measured from 30 children who participated in Head Start and from 32 otherwi...

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Q: Frequency Distributions and Graphs 1. List five reasons for organizing data into a frequency distrib...

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Q: While watching a rousing debate on cable television between two presidential candidates, your TV scr...

A: three hypothesis for the above stated problem is listed below: lets consider two hypothesis (null hy...

Q: An insurance company checks police records on 566 accidents selected at randorm and HolS through d) ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres...

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Q: A pizza parlor offers a choice of 12 different toppings. How many 6-topping pizzas are possible? (no...

A: Given,Total no.of different toppings=12

Q: If you draw a sample of size 10 from a population of size 35 with a population mean of 83.4 and stan...

A: In question, Given that you draw a sample of size 10 from a population of size 35 with a population ...

Q: In a z-test of proportions, the computed z lies in the rejection region. This means that 9. the samp...

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: What are the sample space of the experiment?

A: Here use definition of sample space

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated th...

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Q: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed...

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: You are interested in testing whether the average age of household heads is higher in the suburbs th...

A: Given: For sample 1 (the household heads): Sample size (n1)=45Sample mean(x¯1)=44Standard deviation ...

Q: 1llustration 12.13. (i) Given the trend equation Y 35+5X+3X2 w re 1968=0 a nd X unit=1 year. Change ...

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Q: The expected value for the sum of draws is...

A: One hundred draws are going to be made with replacement from the box containing tickets -1, 0, 1, 1....