Find the z value for each of the following x values for a normal distribution with μ = 30 and = 5. a. x = 39 b. x = 19 c. x = 24 d. x = 44

Q: In a population with o = 6, a score of X = 48 corresponds to z = 1.25. The mean for this population…

A: From the provided information, Standard deviation (σ) = 6 Z value = 1.25 And X = 48

Q: QUESTION 10 Would you accept the alternative hypothesis (in a left tail test), if the probability of…

A:

Q: A statistician reports that the correlation between two quantitative variables X and Y is r= 0.88.…

A: Solution :  Here we have given correlation between two quantitative variables X and Y is 0.88 r ^2 =…

Q: The correlation of 4 pairs of observations is -0.94. What is E( )4 Sy Sx A. -1.03 В. — 1.75 С. -1.38…

A: Formula for correlation coefficient : r = 1n-1∑xi-x¯sxyi -y¯sy

Q: Do colors affect mood? You are particularly interested to know which color gives people a sense of…

A:

Q: Ocean currents are important in studies of climate change, as well as ecology studies of dispersal…

A: x y x2 y2 xy 76 14.2 5776 201.64 1079.2 79 19.6 6241 384.16…

Q: Which of the following estimators is better to estimate the population mean when the :relationship…

A: We are interested in estimating the population mean when the auxillary information X is available.

Q: The table available below shows the costs per mile (in cents) for a sample of automobiles. At a =…

A:

Q: Find the value of  “z sub alpha” z0.15 And  for z0.02

A: The z0.15 denotes the z score for the area of 0.15 to the right of it.

Q: Use the linear correlation coefficient given to determine the coefficient of determination, R²,…

A: Correlation coefficient(R)=0.89

Q: The mean arterial pressure (or MAP, average arterial pressure in one cardiac cycle) is a measure for…

A: From the given information, x¯=1.6sx=0.5y¯=80.1sy=16.9r=0.8 n=50 Consider, the regression equation…

Q: The director of an alumni association wants to determine whether there is any type of relationship…

A: a) The scatter plot is obtained using EXCEL. The software procedure is given below: Enter the data.…

Q: Which of the following estimators is better to estimate the population mean when the relationship…

A: The objective is to find the better estimator to estimate the population mean when the relationship…

Q: Ocean currents are important in studies of climate change, as well as ecology studies of dispersal…

A: (a)   Obtain the values of given sums.   The values of given sums is obtained below as follows:…

Q: calculate the standard score of the given x value x=36.5 where u= 36.5 and a=36.7

A:

Q: Which of the following is the most appropriate model for the given data? ŷ = 1.15(4)x ŷ =…

A: Which of the following is the most appropriate model for the given data?ŷ = 1.15(4)x ŷ = 1.1x + 2.9…

Q: A population of N = 15 scores has a mean of u = 8. One score in the population is changed from X =…

A:

Q: Do you think that there is any correlation between influent and effluent? Is it positive? Is it high…

A: Given Data : a) Scatter Diagram All the points almost lie on the regression line.

Q: Suppose the correlation, r, between two variables x and y is –0.44. What percentage of the…

A: From the given information,Correlation coefficient = -0.44,Coefficient of correlation is the linear…

Q: 20,17,15,15,22,21,16,16,20,22,15,21 Give the test statistic for this hypothesis test. Choose the…

A: It is given that the sample data of size 12 is 20,17,15,15,22,21,16,16,20,22,15,21 Here, the…

Q: Run a regression analysis on the following bivariate set of data with y as the response variable.…

A: The data set is given below :   X Y   75.9 42.1   82.2 42.2   75.2 42.5   82.2 42.2…

Q: If X = 85, Y = 54, and Y' = 62, what is the residual score? a. -8 b. 23 c. 8 d. 31

A: Solution: From the given information, Y=54 and Y’=62.

Q: Consider the model y=-2.45x+7.18 derived from data between x=4 and x=10. What value of x represents…

A: Given that the model y=-2.45x+7.18 is derived from data between x=4 and x=10.

Q: A sociologist wants to determine if the life expectancy of people in Africa is less than the life…

A:

Q: (a) Verify that Ex = 477, Ey = 86.8, Ex² = 62,029, Ey² = 2028.68, Exy = 11036.6, and r = 0.93853. Ex…

A: a. The provided information is x days y km/100 xy x*x y*y 72 14.7 1058.4 5184 216.09 76 19.5…

Q: et x represent the hemoglobin count (HC) in grams per 100 milliliters of whole blood. The…

A: Give that: 14,19,16,14,19,19,14,21,17,17,14,17

Q: Which of the following is not one of the uses of a scatter plot and regression line  a. to estimate…

A: The scatter plot and regression line would be used to, Estimate the average y at a specific value…

Q: Let x represent the hemoglobin count (HC) in grams per 100 milliliters of whole blood. The…

A: The data shows the hemoglobin count in grams per 100 milliliters of whole blood.

Q: 2. Researchers wanted to study physical activity in children, so they gave 74 randomly chosen…

A: k= 2 independent variables n= 74 observations critical value = 1.99…

Q: Find two z values, one positive and one negative, that are equidistant from the mean so that the…

A: Solution: Here, it is needed to find the z-values.

Q: . Adult men Stride length (meters) 2.5 3.0 3.3 3.5 3.8 4.0 4.2 4.5 Speed (meters per second) 3.4 4.9…

A: We have given that,  The data set is,  Stride length (X) :- 2.5, 3.0, 3.3, 3.5, 3.8, 4.0, 4.2, 4.5…

Q: The geoemetric mean of 2, 4 & 8.

A: x log(x) 2 0.301 4 0.6021 8 0.9031   ∑ log(x) = 1.8062

Q: Find the new data point (x,y) in which x=2 from the data points (1.3) and (4.12)

A: The value of table for x and y x 1 3 y 3 12

Q: Joint probability distribution {} 2 1 X 2 3 .08 .09 .05 .12 .14 .11 .15 .10 .16

A: Given: The Joint Probability distribution is given as below:     X   Y 1 2 3 0 0.08 0.09 0.05…

Q: Calculate the t-value for a mean for the following u – u0 = 15.00 n = 25 sx = 10.00

A: The formula of the test statistic is,

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.