A researcher designs a study to determine whether female preschoolers prefer sweetened or unsweetened cereal. The researcher uses a box of sweetened colorful cereal and a box of unsweetened tan colored cereal. The research finds that the group of preschoolers ate more of the sweetened colorful cereal and therefore prefers the sweetened cereal. Which two variables are confounded in this experiment? O A. color of the cereal and children's gender O B. color of the cereal and sweetness of the cereal O C. sweetness of the cereal and amount of eating D. children's gender and amount of eating

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

A:

Q: ladders used by  fruit pickers are typically tapered with a wide bottom for stability and a narrow t...

A: Given: an = 19, d = -2.5, a1 = 49

Q: 12. You are given the following data pertaining to kilowatt hours of electricity consumed by 100 per...

A:

Q: (a) P(X 1); (c) P(-2 < X < 3);

A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPART PLZ REPOST FOR REMAINING  here  use standard normal d...

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

A:

Q: (c) The marble is red or odd-numbered Your answer is : ? (d) The marble is blue and even-numbered

A: Here given A jar contains 10 red marbles numbered 1 to 10 and 12 blue marbles numbered 1 to 12. A ma...

Q: A. Find the mean of the set of data below and construct a sampling distribution, without replacement...

A: Solution-: Given data: xi: 5,8,11,14,17,20 (a) We find the population mean? (b) Complete the given t...

Q: Would it be reasonable to use the standard deviation formula?

A: here  According to a gallup survey of boys 77% of boys had played computer games in the past week co...

Q: When a production process is operating correctly, the number of units produced per hour sa normal di...

A:

Q: The seedlings of a particular type of tree are randomly dispersed in a large area, with an average o...

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

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

A:

Q: 1. Find the area under the standard normal curve that lies to the left of: z = -2.48 a. b. z = 3.00 ...

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only fi...

Q: What percent of the department faculty have less than 25 years of service? Answer:  % (b) If a memb...

A: From the given histogram we need to answer certain questions. 

Q: 1. The following are the ages of the first 10 female visitors at Kath's birthday 8 19 43 25 6 15 22 ...

A: For the given data Find Range =? Quartile deviation =? Standard deviation = ? Variance =?

Q: Town A B C D E F G Population (lakh) (X ) 11 14 14 17 17 21 25 No. of TV sets demanded ('000) (Y ) 1...

A: Given The data is as follows: Town Population (lakh) (X) No. of TV sets demanded ('000) (Y) A 1...

Q: In a certain photographic process of 100 prints, the developing time of prints may be looked upon as...

A: Given,sample size(n)=100mean(μ)=16.20standard deviation(σ)=0.52

Q: In a co-educational institution, out of 200 students 150 were boys. They took an examination and it ...

A:

Q: In a genetics experiment on peas, one sample of offspring contained 353 green peas and 474 yellow pe...

A:

Q: To standardize a normal random variable that has mean u and variance o we use the formula z True O F...

A:

Q: 5. Suppose another researcher is only interested in the number of mRNA until the first "burst". What...

A: Transcriptional bursting is a fundamental property of genes in which transcription from DNA to mRNA ...

Q: A perfect straight line sloping downward would produce a correlation coefficient equal to: O A. -1 В...

A: Given that ; A perfect straight line sloping downward would produced a correlation coefficient.........

Q: In Ms. Noime's math class there are 15 students out of which 4 will be selected to receive a special...

A: In question, Given that In Ms. Noime's math class there are 15 students out of which 4 will be selec...

Q: Suppose the Board of Trustees of a wealthy private university has decided that it wants to waive tui...

A: Normal random variable x follows the distribution with bell shaped curve. The normal distribution is...

Q: Fill in the blank. The complement of "at least one" is The complement of "at least one" is

A: Complement :-Complement is the opposite of the event happening i.e., not happening

Q: Suppose data X1, ..., Xn are sampled from the population, sample mean is a random variable

A: It is given that Sample : x1, x2,......,xn

Q: The following are the monthly figures of advertising expenditure and sales of a firm. It is generall...

A:

Q: For numbers 7 and 8: The seedlings of a particular type of tree are randomly dispersed in a large ar...

A:

Q: If f(x) is a pdf, then f(x) can take any value in R (i.e., f(x) can be any real number). O True Fals...

A: We have given that the statement about to the probability density function (pdf) f(x). 

Q: Enter textA certain drug is claimed to be effective in curing colds. In a n experiment on 164 people...

A:

Q: Find the MLE of 0.

A: It is known that MLE maximizes the likelihood function or log-likelihood function. First we have to ...

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

A:

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

A:

Q: The population mean and standard deviation are given below. Find the indicated probability and deter...

A:

Q: A recent study found that 40% of all people over age of 62 wear hearing aids. If a random sample of ...

A:

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

A:

Q: Question 16: Consider two bivariate models you are estimating both described by: Y, = Bo + B,X+u. Pr...

A: Given the charts graph the true errors with respect to X for the two models, estimating both describ...

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: The data represent the results for a test for a certain disease. Assume one individual from the grou...

A: here total positive = 153 total negative = 147 total individual actually have disease = 164 total in...

Q: percentages of teehagers In varous Counties that hav certain drugs. Complete parts (a) through (c) b...

A: Given data, X Y X*Y X*X Y*Y 23 4 92 529 16 17 3 51 289 9 40 20 800 1600 400 5 1 5 25 1 ...

Q: On five exams, Rachel has a mean score of 80 points. Her lowest score was 50.  If this score is drop...

A:

Q: If our value is not biased, the probability that the sampling error will be a negative value (or the...

A: Here use basic of sampling error and sampling distribution 

Q: Assume that there is a 9% rate of disk drive failure in a year. a. If all your computer data is stor...

A: The following solution is given below:

Q: Suppose f (x) = 8x, 0 < x < 0.5 is a pdf. P(0.2<X<0.3)=? O 1.6 O 0.2 O 0.16 O 2.4

A: Givenf(x)=8x      0≤x≤0.5

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....

Q: Use the data to the right to complete parts (a) through (d) below. Percentage Who Won't Try Don't Ap...

A: Given data, X Y X*Y X*X 45 37 1665 2025 48 39 1872 2304 64 56 3584 4096 76 68 5168 5776

Q: If H, is false, the true or actual mean is equal the hypothesized mean, µ = µo %3D O True O False

A: From the above data the correct answer is  False   

Q: Problem 3: From an experiment in an industrial process the following data have been obtained (see ta...

A: Given the Experimental data as t ut yt 1 -1 0 2 -1 -0.4 3 -1 -0.69 4 -1 -1 5 1 -1.27 ...

Q: 4. Show that (1) SST = Cu – 9)* = vy - ng = v (1. -) (2) sSR= Em – )* = ³ X'y – ng° = v ( H - )v (3)...

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

Q: SmartB” owns a phone battery assembly line which provide phone battery to a mobile company. It is kn...

A:

Q: 15. In the "secret" lock on the common axis are four disks, each of which is divided into five secto...

A: Given that  In a secret lock on the common axis are 4 disk  Each of which is divided into 5 sectors ...