Two researchers adopted different sampling techniques while investigating the same group of students to find the number of students falling in different intelligence level. The results are as follows: No. of students in each level Researcher Below Average Above Genius Total average average 86 60 44 10 200 Y 40 33 25 2 100 Total 126 93 69 12 300 Would you say that the sampling techniques adopted by the two researchers are significantly different ? [ For v = 3, x0.05 = 7.82) %3D

Q: aq* + k (a > 0, b > 0, k 2 0 ) then MC= abq*-l and Marginal Example 14. Show that ifT= h-1 b-2 k ave...

A:

Q: School administrators asked a group of students and teachers which of two school logo ideas, logo A ...

A:

Q: From a sample with n = 12, the mean number of televisions per household is 2 with a standard deviati...

A: Given n=12 Standard deviations=1

Q: Calculate Pearson's coefficient of skewness from the following data: f f 12.5 28 32.5 129 17.5 42 37...

A:

Q: A pharmaceutical company wants to estimate the mean life of a particular drug under typical weather ...

A:

Q: Preschool kids suffer if mother works Respondents sex Crosstabulation Respondents sex MALE FEMALE To...

A: Here dependent variable is attitude towards mother employment of preschool kids. Independent variabl...

Q: Which of the following statements defines the 75th percentile value for a data sample?

A: here as per policy i have calculated first main question    here use definition of percentile 

Q: The probability distribution for a discrete random variable is given below: X         4     6     8...

A: Given that  Probability distribution table  X 4 6 8 10 P(x) 0.40 0.10 0.20 0.30   We know th...

Q: If 5 points were added to each score, then standard deviation of the new scores tyould a) be increas...

A: If 5 points were added to each score,then SD of the  new scores would

Q: playing a gaime p. She wiIS ST Il the Colns comes up neads, and looses omes out talis. She starts wi...

A: Given p=0.6 q=1-0.6   =0.4  

Q: The deviation of each observation (x) from the mean of the predictor variable is negative for every ...

A: The mean of the predictor variable is given by the vertical line of x̄. The mean of the response var...

Q: What will be the mathematical and statistical model/ equation when

A: Here given , X is the dependent variable, and   Y is the independent variable     

Q: From the following data calculate the missing frequency : No. of tablets : 4–8 8–12 12–16 16–20 20–2...

A: Given frequency table is No.of tables 4-8 8-12 12-16 16-20 20-24 24-28 28-32 32-36 36-40 No. of...

Q: Calculate Pearson's coefficient of skewness from the following data: X f f 12.5 28 32.5 129 17.5 42 ...

A: Given data is X F 12.5 28 17.5 42 22.5 54 27.5 108 32.5 129 37.5 61 42.5 45 47.5 ...

Q: Bottles of purified water are assumed to contain 250 milliliters of water. There is some variation f...

A: Claim : The mean amount of water in all the bottles filled that day differs from the target value of...

Q: Check My Work (2 remaining) The U.S. Energy Information Administration (US EIA) reported that the av...

A:

Q: Direction: Define and give your own example on each of the following. (Note: your example in populat...

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

Q: A dinical trial was conducted to test the effectiveness of a drug for treating insomnia in older sub...

A:

Q: Example 12. Find the minimum average cost if the cost function is given by T= 360– 10-2. 5 2g?. Also...

A:

Q: Calculate the expected value of x, the sum of the scores, when two dice are rolled.

A:

Q: What is the probability that the mean number of minutes of daily activity of the 66 mildly obese peo...

A: Given: Mean no. of minutes of daily activity of mildly obese people, μ1=365sd of of daily activity o...

Q: Derive the moment generating function of X ~ Bi(n, p) and using the MGF compute E[X] and Var[X].

A:

Q: A study was conducted to assess the impact of nutrient enrichment on zooplankton densities in A & B ...

A:

Q: Calculate Fisher's price index from the following data and check whether time Reverse Test is satisf...

A: Given:           Base Year (1990)    Current year(1995) Commodity  Price Quantity Price  Quanti...

Q: Here are 6 celebrities with some of the highest net worths (in millions of dollars) in a recent year...

A:

Q: The numbers racket is a well‑entrenched illegal gambling operation in most large cities. One version...

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean ...

Q: Chapter 06, Section 6.3, Problem 035 The pucks used by the National Hockey League for ice hockey mus...

A:

Q: Calls are repeatedly placed to a busy phone line until a connect is achieved. Let c=connect and b=bu...

A: Given statement:calls are repeatedly placed to a busy phone line until a connect is achieved. Let c=...

Q: Find the value of k for the probability mass function F(x) = k () (4 * ) for x = 0,1,2.

A: The given probability mass function is, Substitute the values of x in given mass function as follow...

Q: What percent of the schools have an acceptance rate below 15%? O a) 1% O b) 4% 12% O d) 16%

A: The number of values corresponding to a class or observation is defined as the frequency of that cla...

Q: Consider the data of a businessman that accumulates the daily sales of his restaurant business durin...

A: The data of the daily sales of restaurant for the 10 day is given as: 18,500  23,600  21,210  14,...

Q: 16. Missing class, continued e) Interpret the R2 value: 0.8976. This number is fairly close to 1- wh...

A: Coefficient of determination, r2: The coefficient of determination (r2) is the amount of variation i...

Q: 1. Calculate the batting runs for the top five home run hitters of all time, for the season in which...

A: @solution:::   Batting Runs is the straight loads worth of a player, which is adapted to the player'...

Q: Example 7-35. Four tickets are drawn, one at a time with replacement, from a set of ten tickets numb...

A:

Q: Find the standard deviation, s, of sample data summarized in the frequency distribution table below ...

A:

Q: If X and Y have joint pdf given by

A: From the given information, fX,Yx,y=2I0,yxI0,1y                =2, 0<x<y, 0<y<1  

Q: t estimates association between a binary outcome between groups at group level A. risk difference ...

A: 1) It estimates association between a binary outcome between groups at group level. The answer is Od...

Q: Calculate median from the following data: Marks 0-10 10-30 30-60 60-80 80-90 No. of Students 15 30 8...

A: Given, Marks No.of students cumulative frequency  0-10 5 5 10-30 15 5+15=20 30-60 30 20+30=...

Q: The numbers of incorrect answers on a twe or false competency test for a random sample of 15 student...

A:

Q: . Find the weighted geometric mean from the following data: Weights 46 Group Index Number Food 260 F...

A:

Q: A player tosses two fair coins. He wins $ 5 if 2 heads occur, $ 2 if 1 head occurs and 1 if no head ...

A:

Q: NBC News/Marist sampled 603 likely voters on 10-31-14. They found that 44% said they would vote for ...

A: Givensample size(n)=603point estimate(p^)=0.44

Q: Draw the two ogives for the following distribution showing the number of marks of 59 students : Mark...

A: Given:   MARKS FREQUENCY 0-10 4 10-20 8 20-30 11 30-40 15 40-50 12 50-60 6 60-70 3...

Q: II. Using proportional allocation, determine the sample size needed for every school. The total popu...

A: Proportional Allocation: Allocation of ni's to various strata is called proportional if the sample f...

Q: a. Using Excel, develop the multiple regression equation for these data. b. What is the coefficient ...

A:   SOL Score Salary Tenure 1 81 34300 9.3 2 78 28700 10.1 3 76 26500 7.6 4 77 36200 8.2 5 8...

Q: Example 10. Find maximum profit. If R = 30x – x² and C = 20 + 4x. %3D %3D

A:

Q: i. Compute the exact value of P(4<=X<=8) and ii. Normal approximation to P(4<=X<=8)

A: Given: X~Binomialn=10, p=0.5

Q: Answer Given that p be an n-dimensional random vector of zero mean and positive definite covariance ...

A: Given Information: Consider β be an n-dimensional random vector of zero mean and positive definite c...

Q: D. Direction: Compute the following probabilities using the standard normal curve. Construct a curve...

A:

Q: 1. Suppose when using the Binomial Theorem an expansion turned out to be the expression as shown bel...

A: Formula for Binomial theorem: a+bn=an+nan-1b+nn-12!an-2b2+nn-1n-23!an-3b3+.....+bn Given expression:...