If the sample variance for y1 = {-2, 7,9,13,16,0,15,6} is 44, what is the variance of y2 = 3.8 * y1? Two decimal places.

Q: Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the…

A: The sample of teenagers time is 3.0, 4.25, 5.5, 3.5, 7.0, 6.3, 2.0, 4.5, 3.7, 3.6.

Q: From past results, a professor knows that the test scores are normally distribution with a mean 78…

A:

Q: The mean points obtained in an aptitude examination is 188 points with a variance of 361. What is…

A: It is given that the mean is 188 and the variance is 361.

Q: What is the overall mean? What is the mean of Drug 1? What is the mean of Drug 2? What is the mean…

A: Here use sample mean formula

Q: A researcher says that 49% of the variance in blood pressure can be predicted from heart rate (HR)…

A: From the provided information, A researcher says that 49% of the variance in blood pressure can be…

Q: What does it mean if a Pearson correlation, r between variable X and variable Y is negative?

A: Correlation between two variables measure the strength and direction between two variables. It…

Q: What is Pearson's r correlation coefficient for a set of data with values: (2, 3), (4, 5), (6, 7),…

A: Given The data is in the form of (x, y) and it can be arranged in the table as shown below: x y…

Q: A researcher measures the correlation in rankings for ice cream flavors and consumers' rankings of…

A: Given, ∑D2=19.5n=8

Q: The mean points obtained in an aptitude examination is 179 points with a variance of 225. What is…

A: Let X denote the points obtained in an aptitude examination and it follows normal distribution That…

Q: 3.How do you know if 2 sets of data is pooled? Group of answer choices If the variances are not…

A: If the variances of the 2 sets are equal then we say that the data is pooled.  When we believe that…

Q: How were you able to tell that the 100 in the X~Normal(60,100) was a variance and not a standard…

A: Lex X represents the IQs of individuals admitted to a state school for mental retardation.X follows…

Q: An analysis of variance produces SSb = 30, SSw = 60, F-ratio with df = 2, 15.      For this…

A: From the provided information, SSb = 30 and SSw = 60 Degree of freedom (k - 1) = 2 And (n - k) = 15

Q: Suppose the scatter diagram of a random sample of data pairs (?, ?) shows no linear relationship…

A: The coordinates (?, ?) be (x, y)

Q: The "true" variance is also the population variance True False

A: # Relation between True varience and population varience ?

Q: Find the variance and standard deviation of the given set of data to the nearest tenth. {530, 150,…

A: As we know that varience is of set of data V(x)=1n∑i=1nxi-μ2  and standard deviation is SD=V(x)

Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: If the grades of 100 students have mean 40 and standard deviation 5. If we subtract 3 from each…

A: The new mean is, New mean=Mean-3-2=40-3-2=37-2=-18.5 Thus, the new mean is -18.5.

Q: For Assignment 5 in our course, the researchers hypothetically tested two groups of participants.…

A: Given: SS (lab exercise) = 600, n = 7 SS (exercise in nature) = 1910, n = 7 k =2 levels

Q: Why Squared Correlation Coefficient Does Not Apply to Individual Scores?

A: Squared Correlation coefficient: Squared correlation coefficient is also known as coefficient of…

Q: Ex 2\\ Calculate the Variance and Standard deviation for the following data X= 15, 10, 8, 4, 23, 25,…

A: We have to find standard deviation and variance of given data. Formulae required:  Variance=∑…

Q: suppose the correlation between reading achievement and math achievement in the population of fifth…

A: Given: Sample size= n = 28 r = sample correlation coefficient. We have to find P(r > 0.65)

Q: A researcher says that 50% of the variance in blood pressure can be predicted from HR and that blood…

A: Coefficient of determination: The proportion of the variance in the dependent variable which is…

Q: If a set of 20 values has a variance of 9, what is the standard deviation of the set?

A: Given that n=20, Variance=9

Q: The sum of the squared deviation scores, aka the sum of the squares, is SS=60 for a sample of n=5…

A:

Q: What is the effect of outliers on the value of correlation?

A: An outlier is a score that falls beyond the limits of the scores remaining on the scatter map. For…

Q: Table below show the weight of 80 winter melon harvested from a farm called Fruitful. Weight (kg)…

A: A frequency distribution table represents the frequency distribution of a variable. Here, the…

Q: How to find the variance, explain the formula

A: Mean:Mean is a measure of center in case of quantitative data. Mean of a data set is the sum of the…

Q: What is the example of Pearson correlation coefficient and what is the functions?

A: Correlation between sets of data is a measure of how well they are related. The most common measure…

Q: Suppose that Max is a climate change scientist and butterfly enthusiast. In Max's locale, the mean…

A: The distribution is normal and the population standard deviation is unknown so the t distribution…

Q: A sample of 9 freshmen takes a reading comprehension test and their scores are a mean of 10 and…

A: Consider that μ defines the population mean score.

Q: What are the steps for a hypothesis test for population mean when the variance is known?

A: Given the variance for hypothesis test for population , To write the steps for the hypothesis test…

Q: If I have the variance of 36 and the standard deviation of 6, how do I calculate the range?

A: From the provided information, Variance (σ2) = 36 Standard deviation (σ) = 6

Q: Find how to distribute the variance and standard deviation calculations across the nodes. Variance…

A: In statistics, variance is a measure of how the data points differ from the mean value. It measures…

Q: The mean points obtained in an aptitude examination is 143 points with a variance of 361.   What…

A: The population mean is, The population variance is, The population standard deviation is The…

Q: What is meant by perfect “positive correlation,” “perfect negativecorrelation,” and “zero…

A: Correlation is a technique to determine if there exists linear relationship between two variables.…

Q: If the correlation between variable X and variable Y is perfect, what do you know about the…

A: This question explores the implications of a perfect correlation between two variables, X and Y, on…