Statistics Question

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of thier female date...

A: We know that the (1-α)% confidence interval for the population mean is given by; x¯-tα2;n-1sn,x¯+tα2...

Q: Child psychologists study the time, in months, that it takes for infant boys and girls to say their ...

A: Since , we know that both the samples of infants boys and girls come from the same population , both...

Q: There are 9 people taking part in a raffle. Bob, Elsa, Hans, Jim, Kira, Lena, Omar, Ravi, and Soo. S...

A: Given information: 9 people participated in a raffle. Bob, Elsa, Hans, Jim, Kira, Lena, Omar, Ravi, ...

Q: Jump to level 1 The additional growth of plants in one week are recorded for 6 plants with a sample ...

A: x=The additional growth of plants in one week sample size n=6 Sample mean x¯=8 inches Standard devia...

Q: Twelve different video games showing violence were observed. The duration times of violence were rec...

A: Let's assume, we have the required data for Twelve different video games showing violence and we wan...

Q: Demand for Smartphones The following table shows worldwide sales of a type of phone and their averag...

A: Introduction: Regression analysis is used measures the association or linear relationship between tw...

Q: A study surveys students to determine the amount of Facebook use during the time they are doing Math...

A: Given information: The amount of Facebook used during the math homework is summarized as follows: ...

Q: D. The mean annual cost to attend a attend a college is $44,324. Assume the distribution of annual c...

A: Given: Mean, μ=44324 Standard deviation, σ=4590 To calculate: 90% of all students pay less than what...

Q: Please help.

A: Note: Since you have posted a question with two subparts, we will solve the first part for you. Beca...

Q: 3 Including his own 2 daughters, Mr. Smith usually has a half-dozen or more girls running around his...

A: Given: X be the number of girls then the probability distribution of X is       x:    0        1    ...

Q: Suppose X and Y are independent, Cauchy random variables with PDFS specified by fx(x) 1/n and fy(y) ...

A: From the given information, f(X)=1π(1+x2)f(y)=1π(1+y2) X and Y are independent. Consider, the joint ...

Q: The PDFS of two statistically independent random variables X and Y are shown below. The PDF of the s...

A: Given that PDFs of two statistically independent random variables X and Y are given by; fX(x)=3 exp(...

Q: State the final conclusion that addresses the original claim. (Reject/Fail) to Reject H0. There is (...

A: When n is large , we use Z test statistic. Formula and steps are given below.

Q: Suppose that mean retail price per gallon of regular grade gasoline is 3.55 with a standard deviatio...

A: Given Information: Mean μ=3.55 Standard deviation σ=0.10 Z-score is a measure which tells how many s...

Q: 5. Here is a scatterplot that compares age vs. serum cholesterol levels for 30 randomly sele adults ...

A: Outlier : - The data point is far from the predicted line

Q: Here is a frequency distribution table (FDT) for a small data set: data value frequency 51 7 52 6. 5...

A: Introduction: For a random variable X having k values, the ith observation of which is xi and freque...

Q: What is an experimental trial

A: Experimental trials are studies where researchers introduce an intervention and study the effects.  ...

Q: 10. A student is given a cube of metal that is known to have a mass of 125.0 grams. She measures the...

A: As per honor code we will only answer one question: 10)  a)  Range=Maximum-Minimum=125.3-124.8=0.5 T...

Q: 50 3.25 3.5 3.75 4. 4.25 4.5 4.75 Price ($) a) The line of best fit passes through the points (3.50,...

A: let the given points  passes through would be (x 1 , Y1) = (3.50,160)  and (x 2 , Y 2 )=(4.75,150). ...

Q: Please find the mean, median and mode of the following data set. 74 80 80 84 88 89 91 93 98 100 mean...

A: Introduction: Denote X as a random variable of interest. For the random variable X taking n sample v...

Q: For n = 100 and p = 0.20, use the normal distributionate to approximthe probability that; a. x = 25 ...

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

Q: 9. Which correlation coefficient fits best. The points are clustered closely around a line with nega...

A: The slope is calculated asb=rsysx

Q: 2) A freshman class at a local high school consists of 2500 males and 3000 females. Of this class, 3...

A: Given:-   male students =2500 female students =3000 total students = 2500+3000=5500 graduated studen...

Q: ***For any true/false if the statement is false explain why. Standardized observations are always ...

A: 1) Standardized observations are always positive.  False Standardized value/observation is also call...

Q: The l-distribution. Prove that if X and Y are independently distributed, X having the distribution h...

A: From the given information, X has the Normal distribution, N0,1 The probability density function for...

Q: The average math SAT score is 516 with a standard deviation of 114. A particular high school claims ...

A: To test:H0:μ=516H1:μ>516 It is right tailed test.

Q: A 2​-card hand is dealt from a standard​ 52-card deck, and then one of the 2 cards is chosen at rand...

A: Given information: Total number of cards in the deck = 52 Total number of diamonds in the deck = 13 ...

Q: One letter is selected from each of the names SIMMS, SMITH, SIMON. What is the probability that exac...

A: One letter is selected from each of the names SIMMS, SMITH , SIMON

Q: Q. No. 1. Use following sample home prices ($000s) to answer the questions: 175.0 48.8 995.9 218.9 9...

A:

Q: What is the andswer

A: Two variables are said to be linear if the value of one variable increases the other variable is als...

Q: A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is ...

A: Here the claim is mean(µ) is greater than 14.5 seconds. Hence we have to test the null hypothesis,  ...

Q: Consider the probability distribution function (PDF) f(x) = Ax sin x, for 0 sxs N (a) Consider wheth...

A: f(x) = Ax sin x  , for 0≤x≤π∫0πf(x) =1⇒∫0πAx sinx dx =1⇒A[x∫0π sinx dx -∫0π(ddx∫0πsin x dx) dx=A[-x[...

Q: Please solve on paper onlys

A: Computation: From the calculated table, The value of mean is,

Q: There were 8 brand new laptops delivered to a retail outlet. Of the 8 laptops, 3 are defective. If a...

A: The combination is a mathematical tool to select the objects, it determines the possible arrangement...

Q: Here is a frequency distribution table (FDT) for the last week's deliveries to Oxnard College: Deliv...

A:

Q: True or False. We know the data is mound-shaped and symmetric. If the sample mean is 10, and the sam...

A: A data is said to be mound-shaped or symmetric if both sides of the histogram should be the same. In...

Q: The following table presents data from a solar energy project: X (Deflexión) Y (Flujo de Calor) 271....

A: Hello thanks for your question. Since you have posted a question with multiple sub-parts, I will sol...

Q: The following refer to the following data set: 57 61 61 85 50 39 55 94 34 80 What is the mean (7) of...

A: Given data set , 57, 61, 61, 85, 50, 39, 55, 94, 34, 80 a) Mean ( x¯ ) : x¯ = ∑xn x¯ = 57+61+61+85+...

Q: Cooking oil is produced in two main varieties: mo lyunsaturated. Two common sources of cooking oil n...

A: A contingency table is a type of table where frequency distributions are displayed in the form of a ...

Q: A. The following data scores obtained in an aptitude test of 20 applicants (grouped into two) for a ...

A:

Q: Please solve on paper onlys

A: The value of X and P(X) is given below. X 7 11 12 17 20 p(X) 0.54 0.1 0.11 0.11 0.14

Q: There are 500 employees in Company ABC of which the mean salary per day is Php385.00 with a standard...

A: Given: The number of employees are N=500. The mean salary per day of employees is μ=385. The standar...

Q: Use the histogram to answer the questions. 80 70 Choose which shape best describes the data. 60 Elig...

A: A histogram has been given. The frequency table of the histogram can be projected as follows: Cla...

Q: Use the Venn diagram to answer the 3 following sub-question

A: Given Information:          P(A) = 0.36          P(B) = 0.2          P(A∩B)=0

Q: PLEASE ASSIST IN THIS PROBLEM- IT HAS NOT BEEN GRADED, THE RED X'S APPEAR WHEN I SELECT CHECK MY WOR...

A: Provided information ; SST=15182.9 SSR=14052.2 sample size(n) =10 number of independent variables(k)...

Q: Radon is a colorless, odorless gas that is naturally released by rocks and soils and may concentrate...

A: HYPOTHESIS  H0 :μ = 105H1 :μ < 105 test statistic z = x-μsn=105 -102.54.930=2.38      

Q: The following refer to the following data set: 61 51 28 82 71 73 31 39 95 51 45 What is the mean (x)...

A: Arrange the all observations in ascending order. 28,31,39,45,51,51,61,71,73,82,95 n= 11 = Number of ...

Q: 3. Pharmaceutical firms also conduct research to assess the efficiency of a treatment program. Suppo...

A: a. A sample is a small group of observations from tha populations from which conclusions are drawn a...

Q: Let X1, X2,..Xn be a random sample from a Poisson distribution with variance 0. Find a sufficient es...

A: Reviewing information, Given that,  X1, X2,⋯⋯⋯,Xn  ~Poissonmean=θ since for Poisson distribution, me...

Q: Jump to level 1 The additional growth of plants in one week are recorded for 6 plants with a sample ...

A: Given data,n=6x=10s=1α=0.10df=n-1=5