The age of A and B are in the ratio 7:8,six years ago,their ages were in the ratio 5:6 .Find their present ages.

Q: A mutual funds company’s newsletter says, “A well-diversified portfolio includes assets with low cor...

A: a) Correlation between two variables measure the strength and direction between two variables. It me...

Q: Find the​ P-value for the indicated hypothesis test with the given standardized test​ statistic, z. ...

A: Z score = 1.39 Right tailed test Level of significance = 0.04

Q: Statistics Question

A: (a)   Use EXCEL to obtain the regression equation.   EXCEL procedure:   Go to EXCEL Go to Data>D...

Q: Complete the missing information for this regression model. Note: N = 26. |X3 Ý . - 31.85 + 2.071X1 ...

A: P-value for coefficient β1: The degrees of freedom is, df=N-k-1=26-3-1=22 The degrees of freedom is ...

Q: 8.6 Cherry Trees: Timber yield is approximately equal to the volume of a tree. however, this value i...

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to ou...

Q: A randomised controlled experiment investigated this by injecting pregnant guinea pigs with 0.5 mg/k...

A: a)  H0: μ1 = μ2      H1: μ1 ≠ μ2

Q: You wish to test the following claim (HaHa) at a significance level of α=0.10α=0.10.      Ho:μ=63.8H...

A: The summary of statistics is, M= 52.1,s=12.5,n=11 The null and alternative hypothesis is, The type ...

Q: question 1

A: Given, Claim: Most adults erase all of their personal information online. 690 randomly selected adul...

Q: Let x be a random variable representing the length of a cutthroat trout in Pyramid lake. A friend cl...

A: As given, Let x be a random variable representing the length of a cutthroat trout in Pyramid lake. x...

Q: Multiple-Choice Exam A student takes an 18-question, multiple-choice exam with two choices for each ...

A: 18 multiple choice question Each with two choices P(correct) = ½ = 0.5 Let X denotes the number of q...

Q: Scenario: The following table lists the typing speed as measured by a standard typing test for 12 co...

A:

Q: Based on the data shown below, calculate the regression line (each value to two decimal places)ŷ = ...

A: From given data, X Y X*Y X*X 1 3.98 3.98 1 2 7.06 14.12 4 3 10.64 31.92 9 4 14.72 58.88 1...

Q: Can you please do part a, b, c and d. I already post this question before and those part are wrong

A: Solution: a. Let X be the score for games played in the NFL. From the given information, X follows n...

Q: i want to solve it in minitab please

A: The given data set is:

Q: 3. Mr. Smith Claims that students at Bamfield College of Aeronautic have a higher grade point averag...

A: Solution: Given information: n1=17 Saample size of Mar Deln2=16 Sample size of Bamfield x1=2.96 Samp...

Q: I need to know how to identify what test should be run on a Ti83 or 84 calculator

A: Ti 83/ 84  command  STAT > TESTS > Z-TEST >Stats > enter the data  (I have provided you ...

Q: An insurance company hires an actuary to determine whether the number of hours of safety drivingclas...

A: Solution:  The explanatory variable is number of hours of safety driving classes.  

Q: A study was done to look at the relationship between number of lovers college students have had in t...

A: The table below shows the required calculations-   Lovers (x) GPA (y) x2 y2 xy   4 2.7 16 7.29...

Q: Truck Inspection Violations The probabilities are , 0.1, 0.1 and 0.8 that a trailer truck will have ...

A: Consider X1 be the  trailer truck which have no violations and has probability (p1) equal to 0.1  Si...

Q: Annual high temperatures in a certain location have been tracked for several years. Let XX represent...

A: The following column can be calculated as:

Q: How reliable are mutual funds that invest in bonds? This depends on the bond fund you buy.A random s...

A: Given: The government bond is taken as group 1. The corporate bond is taken as group 2. n1=13n2=16α=...

Q: Run a regression analysis on the following data set, where y is the final grade in a math class and ...

A: From given data, X Y X*Y X*X 5 43 215 25 8 71.2 569.6 64 9 71.6 644.4 81 12 72.8 873.6 14...

Q: Trial best fits which of the following descriptions? Select the correct answer below:   a...

A: Trial is  called as an outcome of an experiment.  

Q: 10

A: Here, Year is dependent upon the population, so the year is the dependent variable denoted by y. The...

Q: Nearly 10,000 U.S. Adults were asked their opinion regarding the legalization of marijuana. 10% of r...

A:

Q: In a program designed to help patients stop smoking. 177 patients were given sustained care, and 83....

A: Given,   Sample size = 177 Sample proportion = 0.836   The null and alternative hypothesis is:

Q: Let x be a random variable representing the SAT math score of student. We may assume that x has a no...

A: Given,   Sample size = 75 Sample mean = 645 Population standard deviation = 25   Under the claim, th...

Q: Please explain this problem.

A: Sample size, n = 120 p^ = 0.31 99% confidence level

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A: a) Given that level of significance is 5%. That is, the level of significance is 0.05   b) Given tha...

Q: 81 students at a college were asked whether they had completed their required English 101 course, an...

A: The number of students said yes (x) is 54 and the sample size (n) is 81.

Q: 1.) Sample SizeYou work in the leasing office of GE capital and wish to predict the average mileage ...

A: Given that standard deviation, σ=500Margin of error, ME=100Confidence level=99%Significance level=1%...

Q: For a confidence level of 98% with a sample size of 23, find the critical t value.

A: Given  Confidence level is 98% or 0.98. Sample size is 23. Calculation: The α level is calculated by...

Q: The mean of the differences between before and after measurements is denoted as - D - Xd - Xdifferen...

A: Paired t-test:    

Q: How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in te...

A: Given data set, 55 75 65 60 90 65 30 23 100 110 105 95 105 60 110 120 95 90 60 70    

Q: Using your favorite statistics software package, you generate a scatter plot with a regression equat...

A: The correlation coefficient is -0.749.

Q: . The term sample usually refers to a sample that ___ - Consists of people with chemical dependency ...

A: It is an important part of statistics. It is widely used. 

Q: A sociologist is interested in the relation between ?,the number of job changes and ?, the annual sa...

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any ...

Q: Claim: The standard deviation of pulse rates of adult males is less than 12 bpm. For a random sample...

A: The claim is that the standard deviation of pulse rate of adult males is less than 12 bpm.

Q: An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15. For ...

A: The given information is, The formula for  calculating the F-ratio is,

Q: Between April 13-14th, 2016, Rasmussen’s polling organization asked 1,000 American adults “Currently...

A:

Q: If n=31, (x-bar)%3D36, and s=3, construct a confidence interval at a 95% confidence level. Assume th...

A:

Q: How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in te...

A:

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who smok...

A: a) The sample size can be estimated as follows: n=ze2p(1-p)where, z = z scoree = errorp = proportion...

Q: Suppose that a company owns 500 computers. Each computer has an 11% probability of not working. Supp...

A: It is given that n =19.

Q: Consider the following joint density (with support shown in the graph): 6 (y1 + Y2)², 0< Y1 < 1, 0<y...

A: It is an important part of statistics. It is widely used. 

Q: Please answer all parts of question and show your work.

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want solution...

Q: I need to know how to calculate this question using a ti83 calculator (not Excel) and explain how to...

A: Claim : The age distribution of the general Canadian population fits the age distribution of Red  Vi...

Q: Mendel’s Theory According to Mendel's theory, if tall and colorful plants are crossed with short and...

A: Given that  P(Tall and colorful)=9/16 P(Tall and colorless)=3/16 P(short and colorful)=3/16 P(short ...

Q: Amusement Park Game At an amusement park basketball game, the player gets 4 throws for $1. If the pl...

A: It is given that probability that Mary makes about 70% of her shots. Hence the probability that Mary...

Q: The following table shows the approximate numbers of school goers in the United States (residents wh...

A: Given The appropriate number of school goers in the united states.

Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.