The correlation coefficient between variables X and Y is 0.62. What does this signify?   Question 8Answer a. When Y increases 1, X increases by 0.62 b. When X increases by 1, Y increases by 0.62 c. The variance shared by X and Y is less 20% d. The variance shared by X and Y is 62%

Q: Complete the stemplot for the following data. 48 24 21 19 33 34 46 38 19 22 14 11 34 27 13 29 30…

A: Given data are,48, 24, 21, 19, 33, 34, 46, 38, 19, 22, 14, 11, 34, 27, 13, 29, 30, 12, 45, 23, 24,…

Q: The arrival rate at the sorting machine is at the rate of 90 per hour following a Poisson…

A: Given thatThe arrival rate of sorting machine say(λ)=90The service rate of sorting machine…

Q: Find the sample variance and standard deviation for the following sample: 59 25 12 29 16 8 26 30 17

A: The sample variance is 225. The sample standard deviation is 15.Explanation:The sample variance and…

Q: You are trying to find how many prefer to drink beer in a bar and how many prefer not to drink beer…

A: For each bar, calculate the variability of preferences by taking the absolute difference between the…

Q: Calculate the mean of a Chi- Square distribution with 7 degrees of freedom?

A:

Q: According to one study, brain weights of men are normally distributed with a mean of 1.40 kg and a…

A: For the distribution of the brain weight (in kg), the parameters are given as follows:The mean,…

Q: You are trying to find how many prefer to drink beer in a bar and how many prefer not to drink beer…

A: To determine the variability of preferences for drinking beer in the bars, we can calculate the…

Q: A state is planning to construct a new water treatment plant to meet the increasing demand for clean…

A: Assumptions:Assume 1 million residents in the state currently.Assume a constant per capita water…

Q: Tensile strength tests were carried out on two different grades of wire rod resulting in the…

A: 95% confidence interval for difference between true average strengths for the two grades: (-16.741,…

Q: In a population, the data value 180 has a z score of -0.8. The standard deviation of this population…

A: The question is about z score.Given :Raw value ( x ) = 180z score = -0.8Standard deviation of the…

Q: Suppose there is a set of cards of the same shape and weight, all the cards have the same pattern on…

A: Given data table is,Card drawn:circle square wavy lines cross…

Q: Calculate the covariance between the two variables below (3 significant digits in FINAL answer):…

A: The information related to the two variables is given below.Observation123Funding81012Outcome469

Q: u are given the following information obtained from a sample of 5 observations taken from a…

A: Sample size n=598% confidence interval.

Q: researcher claims that a post-lunch nap decreases the amount of time it takes males hen they did not…

A: From the information, given the hypotheses arewhere,  denotes the hypothesized mean of the…

Q: Assume that when human resource managers are randomly selected, 49% say job applicants should follow…

A: Given ,49% say job applicants should follow up within two weeks .i.e, P(success) = p = 49% = 0.49If…

Q: A state government is planning to distribute tablets to students in public schools to facilitate…

A: 1. Total Number of Tablets: Total budget allocated = $450,000Cost per tablet = $300Number of tablets…

Q: For the cross-labulation data shown below, which represents a count of the type of books that…

A: The cross-tabulation data which represents the type of books that an individual prefers is shown…

Q: 2. According to a survey, 13% of Americans are afraid to fly. Suppose 125 Americans are sampled. a.…

A: Given, 13% of American are afraid to fly.i.e, p = 13% = 0.13supposed 125 Americans are sampled .i.e,…

Q: scientist claims that pneumonia causes weight loss in mice. The table shows the weights (in grams)…

A:

Q: A random sample of 38 taxpayers claimed an average of $9,808 in medical expenses for the year.…

A: Given ,Sample size , n = 38Mean , $9808Standard deviation , $2411We have to find the confidence…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: A marketing expert for a pasta-making company believes that 50% of pasta lovers prefer lasagna. If…

A: A marketing expert for a pasta-making company believes that 50% of pasta lovers prefer lasagna. 13…

Q: Using the data in the Excel file Ohio Education Per-formance, test the hypotheses that the mean…

A: The objective is to test the hypotheses that the mean difference in writing and reading scores is 0…

Q: Assume that the random variable X is normally distributed, with mean = 50 and standard deviation σ =…

A: The mean and standard deviation of random variable X are 50 and 11 respectively.

Q: Using the output below, predict the amount of monthly sales if monthly advertising expenses is…

A: From the given information, it is clear thatThe value of intercept(b0) is 759.57The value of…

Q: Observed time (minutes) 25.1 23.6 26.3 25.4 24.9 27 24.2 27.7 26.1 25.8 24.1 26.5 Given the…

A: The corrected standard time, considering an 11% allowance for personal needs, fatigue, and delays,…

Q: . Researchers believed that an increase in lean body mass is associated with an increase in maximal…

A: The objective of the question is to interpret the results of a significance test for the slope of a…

Q: Mean GPA for low SES students: 2.8 Standard deviation of GPA for low SES students: 0.5 Mean GPA for…

A: Answers: a) The coefficient of variation (CV) measures the relative variability of a dataset…

Q: The heights (in cm) for a random sample of 60 male employees of S&M Construction Company were…

A: Correct ans is DBy using calculater we getP value Greater than 0.10Explanation:Based on the given…

Q: list all the variables (listed in the rows) that showed significant associations with participants'…

A: The objective of the question is to identify the variables that have a significant association with…

Q: A light fixture contains five lightbulbs. The lifetime of each bulb is exponentially distributed…

A: The objective of the question is to find the probabilities and mean of the lifetime of lightbulbs…

Q: et X1, X2,..., Xn be a random sample of size n 3 from a normal distribution ith unknown mean and…

A: X~N(μ,2)

Q: An environmental group wanted to estimate the proportion of fresh produce sales identified as…

A: The objective of this question is to compare the 95 percent z-interval for a proportion constructed…

Q: According to a survey, 13% of Americans are afraid to fly. Suppose 125 Americans are sampled. a.…

A: a.Suppose p is the true proportion of population of Americans who are afraid to fly.It is given…

Q: Find the expected value for the random variable: E(X) = || x 1 3 5 6 P(X) 0.24 0.13 0.19 0.44

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: 1. Which of the following is a non-probability sampling method? Simple Random Sampling Cluster…

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

Q: A molecular biologist is studying the effectiveness of a particular enzyme to digest a certain…

A: To find the 95% confidence interval for the difference μx​−μy​,we'll use the formula:Where: and are…

Q: A random sample of 105 automobile owners in a region shows that an automobile is driven on average…

A: Let x¯ is the sample mean and s is the sample standard deviation , here n is the sample size of the…

Q: Round to three decimal places as needed.) Part 4 The confidence interval estimate of sigma is…

A: Let  be the population standard deviation.Given that,Confidence level Sample standard deviation

Q: A light bulb manufacturer guarantees the mean life of a light bulb is at least 731 hours. A random…

A: Given,

Q: can you do the next part of the question please

A: (i) To calculate the life expectancy E(Tx​) for a person aged 55 from this population,we need to…

Q: The lifespan of xenon metal halide arc-discharge bulbs for aircraft landing lights is normally…

A: n=9,x¯=2826,μ=2400,σ=570α=0.01

Q: CO HCS Bookmarks myopenmath.com/assess2/?cid=208543&aid=14753786#/skip/11 Discrete Random Variables…

A: So, the answer is:P(at most five)≈0.000437408no, this does not support a charge of gender…

Q: An experiment was conducted to investigate the relationship between the dose of a pain medication…

A: The objective of the question is to understand what information can be gleaned from a plot of the…

Q: Using 81 quarterly observations on the growth rate of employment (Y) and the growth rate of output…

A: Given that using 81 quarterly observations on the growth rate of employment  and the growth rate of…

Q: A taxi company is trying to decide whether to purchase brand A or brand B tires for its fleet of…

A: There are  brands of tires: A and B.An experiment is conducted for estimating the brand's…

Q: A group of 6 students' cholesterol levels are tested. Suppose the probability of a student having a…

A: The objective of this question is to find the probability that exactly three out of the six students…

Q: The Blacktop Speedway is a supplier of automotive parts. Included in stock are 12 speedometers that…

A: Complete the probability distribution table.xP(x)00.604410.362620.032930.0000Find the mean of this…

Q: 1. A researcher is studying the effect a new drug into on blood pressure. The researcher measures…

A: The provided information is as follows:The total number of participants is .The mean difference in…

Q: Question 1: Show that SST=SSTreat + SSE, ni where SST = ½-1 Σ±±1(Yij — ÿ..)², SSTreat = Σ½ ²±1…

A: It is required to prove that: