Two items R and S belong to one test of numerical ability. Item R is passed by 50 and failed by 40 students in a group of 90 stu- dents. Item S is passed by 60 and failed by 30 students in the same sample. Find the correlation between R and S.

Q: Heights of me are normally distributed with a mean of 176cm and a standard deviation of 7cm.what is ...

A: here is given that, mean = 176   and standard deviation is 7 we will use z-standard normal approxima...

Q: The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine ...

A: Here data given : for pulse rate of 9 students. We know : z score = (x-mean) /Standard deviation Fir...

Q: The following data set shows the frequency distribution for the students’ score in Statistics class....

A: Given: Frequency distribution  49-52 2 53-56 4 57-60 1 61-64 4 65-68 4 69-72 2 73-76...

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A: The total no. of experiments outcomes exists in this blood analysis using 2 procedures: P1 np1 can b...

Q: 6. Television station ABC wants to know the proportion of TV owners in Metro Cebu who watch the stat...

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

Q: 12 Find out the value of A from the following data, and convert this value of Á into student t-value...

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Q: 2. The time Xit takes Professor Sawyer to drive to campus on a randomly selected day follows a distr...

A: Introduction: The random variable X denotes the time taken by the professor to drive to campus on a ...

Q: An oil company purchased an option on land in Alaska. Preliminary geologic studies assigned the foll...

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Q: Use Fisher 's form find the price index number of the following table: Commodity Unit Base Year Curr...

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Q: deviation of 9. A second random sample size n2 =10 is taken from another normal population with mean...

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Q: te P[|X|<] for the joint PDF E = {* 22 + y? < 1, 0, otherwise. ate P|Y|< |X|] for the joint PDF 12 +...

A: *Answer: 

Q: Calculate: a= Answer b= Answer TIP: Use expected value and variance properties.

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Q: The mgf. of a r.v. X is (}+3) (+e) . Show that 9-x Ρ(μ- 2σ<X<με 20 - Σ (!) ( (3) P (μ- 2σ< <μ+ 20-Σ(...

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Q: Two cards are drawn (a) successively with replacement -(b) simultaneously (successively without repl...

A: Given  2 cards are drawn from 52 well shuffled deck.

Q: A golf ball is selected at random from a golf bag. If the golf bag contains 8 yellow ​balls, 6 black...

A: Given  20ball=8(yellow)+6(black)+4(red)   

Q: Interval Frequency The lives (in hours of continuous use) of 100 randomly selected flashlight batter...

A: We know that data. Mean = sum of all observations/total number of observations   

Q: Let D denote the event that a subject has a certain disease. Let S denote the event that a subject i...

A: Given: P(D|x) = exp(α+Xβ) / (1+exp(α+Xβ)). 

Q: Suppose that two continuous random variables X and Y have joint probability densi fry = A(exy +e 2x-...

A:

Q: Three students (A, B, and C) are asked to determine the volume of a sample of ethanol. Each student ...

A: For Student A: Mean = 67.1 For Student B: Mean = 67.02 For Student C: Mean = 67.68 True Volume = 67....

Q: The accompanying Major League Baseball data provide data for one season. Use the data to build a mul...

A: The data of basket ball league of one season is given.

Q: A jar contains 7 pennies, 7 nickels and 2 dimes. A child selects 2 coins at random without replaceme...

A: Jar contains : 7 pennies, 7 nickels and 2 dimes Child selects 2 coins at random We have to answer fo...

Q: find an example of a multivariate linear model. Cite it, illustrate it, and briefly explain what the...

A: Suppose that a manager wants to identify the impact of price and advertisement on the sales of good....

Q: Using the Weight Scoring technique, provide the weight scores for each car option. Which car should ...

A: Answer:   Total weighted score of car A= (0.3*3) + (0.5*6) + (0.2*4)   = 0.9 + 3 + .8 = 4.7   Total ...

Q: Find the margin of error for the given values of​ c, s, and n.   c=0.90​, s=6​, n= 9   The margin of...

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Q: Given the following stem and leaf plot what is the first quartile? 10 0 ...

A: From the given stem and leaf plot First quartile = ?

Q: 3) Ball beoning of agiven brand Lweight 0:50g with of 0.02g.cohatis the probobility that too. lots o...

A: Given: Ball bearings of a given brand weigh 0.50 g with a standard deviation of 0.02 g.

Q: Exercises 29: Recent studies of the private practices of physicians who saw no Medicaid patients sug...

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Q: Use the given confidence interval to find the margin of error and the sample mean.   ​(13.7​,20.7​) ...

A: Given Data Lower limit = 13.7 upper limit = 20.7

Q: if 2 events A and B are independant and you know that P(A) = 0.75, what is the value of P(A|B)

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Q: opose are running a study/poll about the probability of a true negative on a test for a certain canc...

A: We have given that  Sample size n = 109 Favorable cases x =71 Sample proportion p^=x/n = 71/109 = 0....

Q: 4. A die is rolled 100 times with the following distribution: Humber 1 2 3 4. Observed frequency 17 ...

A:

Q: Find the standard deviation for the set of grouped sample data. Interval Frequency 0.5-3.5 3.5-6.5 6...

A: We have given that,     Class :-    0.5-3.5    3.5-6.5    6.5-9.5   9.5-12.5  Frequency:     5      ...

Q: II. In two sets of variables X and Y with 50 observations each, the following data were observed: X ...

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Q: T3-M4, a legendary astromech droid from the Old Republic, wants to examine the effectiveness of his ...

A: A distribution with bell shaped curve is called normal distribution which is symmetric about the mea...

Q: Use the given confidence interval to find the margin of error and the sample mean.   ​(68.3​,80.9​) ...

A: The given confidence interval is (68.3​,80.9​)

Q: To study the correlation between the weights and heights of the students of a college, a sample of 1...

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Q: Let X1, X2, X3,..., X, be a random sample from a distribution with known variance Var(X,) = o?, and ...

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Q: c) A card is drawn from a standard deck of cards. What is the probability of drawing Jack OR Queen? ...

A: Number of card in standard deck = 52 Number of Queen cards = 4 Number of Jack cards = 4

Q: Question 9 The systolic blood pressure of adults in the USA is nearly normally distributed with a me...

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Q: A jar contains 5 pennies, 5 nickels and 3 dimes. A child selects 2 coins at random without replaceme...

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Q: Find the missing information in the following table : A в Combined Number 10 8 24 Mean 20 15 Geometr...

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Q: An assembly consists of three mechanical components. Suppose the probabilities that the first, secon...

A: Given that, an assembly consists of three mechanical components.    probabilities that the first, se...

Q: The accompanying data represent the homework scores for material on Polynomial and Rational Function...

A: Given : Class width = 10 First class = 30

Q: Male and female populations of humpback whales under 80 years old are represented by age in the tabl...

A: Formula for mean and standard deviation  Mean=∑f⋅x/n Standard deviation=√((∑f⋅x2-(∑f⋅x)2/n)/n) Note:...

Q: SIMPLE convenience store is arranging a promotion plan for the next season. The marketing team wants...

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

Q: Assume that when adults with smartphones are randomly selected, 49% use them in meetings or classes....

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Q: The five number summary for the average annualwage per employee for each U.S state and D.C is given ...

A: Here is given that, Min = 333532   Q1 = 38057    Q2 = 40577    Q3 = 46267.5    Max = 77843  

Q: Commodities 8. Given the data in the adjoining Table, where p and q respectively stand for price and...

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Q: Assuming that a study on risk management practices among 848 entrepreneurs is being made and some of...

A: Element is a collection of data organized in a table.  

Q: How would you use the normal distribution to find approximately the frequency of exactly 5 successes...

A: