The superintendent of a large school district wants to test the effectiveness of a new program designed to improve reading skill among elementary school children. There are 30 elementary schools in the district. The superintendent chooses a simple rando sample of five schools, and institutes the new reading program in those schools. A total of 4700 children attend these five scho The sample is a (Choose one) v sample. simple random cluster systematic convenience voluntary response stratified

Q: played probability songs played a) You like both of them. Would this be unusual? ) You like neither ...

A:

Q: If the odds for a certain event are 5 to 19, what is the probability of the event occuring? Write yo...

A: GivenOdds for a certain event are 5 to 19

Q: The letters in the word MATHEMATICS are arranged randomly. Write your answers in decimal form. Round...

A:

Q: Construct a cumulative frequency distribution table. At a recent basketball tournament, all 10 of t...

A:

Q: From the data given below find the number of items (n) : r = 0.5, E xy = 120, oy= 8, E x = 90 %3D Wh...

A:

Q: . You decided to collect a bunch of cans of soda and measure the volume of each can. Let x be the nu...

A:

Q: A survey is planned to determine the mean annual family medical expenses of employees of a large com...

A:

Q: CASE: You want to determine the degree/strength of relationship between height and weight. Variable ...

A: Given that we want to determine the degree/strength of relationship between height and weight.  Vari...

Q: 1. Explain why we organize data into a frequency distribution. 2. Differentiate frequency array fro...

A:

Q: For a given set of bivariate data, the following results were obtained. X= 53.2, Y= 27.9, Regression...

A:

Q: A recent survey found that 30% of IRSC students plan to go on a vacation after graduation. Suppose 5...

A: Solution: Let X be  the number of students that plan to go on a vacation after graduation.  The prob...

Q: #2 ou want to know the mean number of hours music students at your school practice each week. At eac...

A: We have given that data  I want to find mean.  Mean = sum of all observations/total number of observ...

Q: Indicate the type of hypotheses each of the following by indicating directional or non directional ...

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

Q: СРА Actuary 30 40 50 60 70 80 90 100 Salary (thousands of $) If a person is making the third quartil...

A:

Q: This sampling technique is used to ensure a representative of each group, especially when the popula...

A: Here, we know that if the population is very large and heterogeneous, then whole population divide i...

Q: Use the confidence interval to find the margin of error and the sample mean.   (1.51,1.97)   Margin ...

A: Given confidence interval is (1.51 , 1.97)

Q: You are given below the following information about advertising and sales: Adv. Exp.-(X) ($ crore) S...

A:

Q: Studies of the size and range of wild animal populations often involve tagging observed individual a...

A: Answer:-----                            Date:----21/2/2022  

Q: Example 19-36. If Ux = a + bx+cx², prove that 3 | U,dx = 2U2 + 2 (Uo-2U2 + U4) 1 and hence find an a...

A:

Q: Find the margin of error for the given values of​ c, σ​, and n.   c=0.95​, σ=3.4​, n= 49   E=

A: Given that, c=0.95​, σ=3.4​, n= 49   The formula for calculating the margin of error is, Critical ...

Q: In a recent poll, a random sample of adults in some country (18 years and older) was asked, "When yo...

A: Required probability is P(less likely | 45-54 years of age)

Q: Use the confidence interval to find the margin of error and the sample mean. (0.206,0.390) M...

A: Ans#-  Use the confidence interval to find the margin of error and the sample mean.            (0...

Q: I am having hard time solving a? I am struggling to understand this question. Can you please show me...

A: Formula: y^±tα2,n-2s1n+xobs-x¯2SSxx Excel Procedure: Enter X and Y data in Excel Go to Data Click o...

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americ...

A: The random variable X follows normal distribution. The number of successes is 433. The sample size i...

Q: A retail company has historically sold an average of 32 items per day. A local franchise is testing ...

A: Here is given that, n = 30 t-statistic is 13.69 Hypothesis is one tailed test.

Q: You are interested in whether or not two measures of children behaviour  are equlvalent. The measure...

A:

Q: For questions 1 and 2, sketch an appropriate graph as part of your solution. A college entrance exam...

A:

Q: 14. Which of the following can serve as the probability distribution of a ndom variable X? A. P(X) f...

A: we know:-if P(X) is probability distribution of X then (i)  0≤P(X)≤1   for all given X(ii)  ∑for all...

Q: A manufacturer buys computer chips from a supplier. The supplier sends a shipment containing 10% def...

A: Given,n=13p=0.1A random variable X~Binomial(n=13 , p=0.1)P(X=x)=13x0.1x1-0.113-x ;  X=0,1,2,...13

Q: Situation 2. Dr. Romero observed the level of motivational behavior of his students and tried to fin...

A: Given information: Student Science Grade Motivational Behaviour 1 Failed 3.46 2 Failed 4.3...

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on ave...

A:

Q: Assume the random variable x is normally distributed with mean u= 89 and standard deviation o = 5. F...

A: Given: Mean,μ=89Std deviation,σ=5  

Q: 10. The following table shows the probability distribution of a discrete random variable X. Find the...

A: As per our guidelines we are suppose to answer only one question.  

Q: The average amount of money spent for lunch per person in the college cafeteria is $6.52 and the sta...

A: As per guidelines expert have to answer first question three subparts only dear student please uploa...

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The resul...

A:

Q: The trend of thinner beauty pageant winners has generated charges that the contest encourages unheal...

A:  

Q: Given the following data on types of vaccines given in Malaysia (A = AstraZaneca; P = Pfitzer; S = S...

A:

Q: A Washington scratch off lotto ticket will be a winner one out of five times. Out of a shipment of n...

A:

Q: Solve the problem. Michael gets test grades of 73, 76, 82, and 87. He gets a 80 on her final exam. F...

A: Weighted mean formula is = w1x1 +w2x2 +w3x3 +.............+ wnxn

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a s...

A:

Q: Assume that a sample is used to estimate a population proportion p. Find the 99.9% confidence interv...

A: Given that :  Sample size(n) = 386 Success (x) = 215 Proportion (P) = x/ n By using proportion test ...

Q: Save The waiting times between a subway departure schedule and the arrival of a passenger are unifor...

A:

Q: An intersection is equipped with video surveillance cameras. The average number of times the interse...

A: We know that  Poisson probability distribution  Pmf. P(X=x)= e-λ λx/x! λ = 2 per day  And i want to ...

Q: Determine the area under the standard normal curve that lies to the right of 0.61.

A: We have given that.   X~N( 0 , 1 )  for standard normal.    μ =0 , ? =1   Z-score =( x - μ )/?  

Q: The probability distribution shows the number of items a customer buys in a book store and their cor...

A:

Q: rela 6. 6. Ues för Corelation Ce y 8. 10 13 19 Clic Clic 3 0.997 4 0.950 5 0.878 6 0.811 7 0.754 80....

A: Given : X Y 2 4 4 8 6 10 6 13 7 19

Q: Suppose there is a 10.4% probability that a randomly selected person aged 20 years or older is a smo...

A: Given that  P(smoke)=10.4%=0.104 P(Males/Smoke)=19.8%=0.198

Q: 2. On a scale from 1 to 10, the mean approval of homosexual relations in the U.S. is 7.8. The mean a...

A:

Q: Which of the following is true? The sum of the probabilities of collectively exhaustive events must...

A: The probability is a chance, it can occur any outcome of the random experiment. The probability of a...

Q: he average monthly spending on gasoline in New York State is $85 per person. A undom sample of 453 r...

A: Given that  Sample size n =453 Population mean =85 Standard deviation = 20 Sample mean = 83