If two variables are negatively associated, then above-average values of one tend to accompany A. negatively signed B. below-average C. above-average D. oppositely signed values of the other.

Q: For a certain class, the relationship between the amount of time spent studying and the test grade…

A: Given that,  The relationship between the amount of time spent studying and the test grade earned…

Q: The variance of the data :. 6 ,6 ,-6,-6 is equal to

A: Find variance of the data  6 ,6 ,-6,-6

Q: 70.87 26.11 33.87 12.85 21.40 6.49 10.50 9.54 9.03 3.71 1.26 0.62 1.39 6.46 2.60 2.05 15.25 19.26…

A: The given data is: 70.87, 12.85, 21.40, 6.49,10.5,3.71,1.26,6.46, 26.11,15.25,19.26,5.65,9.54,2.01,…

Q: A botanist wants to know if two different soils lead to different levels of evaporation in plants.…

A: In this case, Each of the plants is used in both soils, she can use a paired samples t-test to…

Q: An business reviews data on the daily amount of calls it receives. Are the data discrete or…

A: Discrete Variable: A variable which assumes only specified values within a given range is a discrete…

Q: Let A represent the battery life of a brand A laptop, and let B represent the battery life of a…

A: The battery life of brand A laptop is A and the batter life of brand B laptop is B.

Q: A set of data has a mean of 16,  a median of 15 and a mode of 14. which of these numbers must be…

A: From the information, the mean is 16, median is 15 and mode is 14.

Q: The number of students in a classroom would be considered which type of data.

A: It is needed to find the type of data for the number of students in a classroom.

Q: John calculated r -.44 for a set of n 10 pairs of values that represent the number of absences from…

A: Given that r = -0.44 midterm exam score ( y )   number of absences from class (x)

Q: State each case whether you would expect a positive correlation, a negative, or no correlation.

A: Here use definition of correlation  Positive correlation: as independent variable increases  ,…

Q: Calculate the mean, median, and mode numbers of hours her friends spent on Facebook. Does the mean…

A: First we have to sort the data in ascending order as 2,2,2,2,3,3,3,9

Q: An instructor teaching an 8 am class randomly samples a group of students who regularly attend class…

A: Generally Coffee tends to reduce the amount of sleep a person gets. So, we expect that more the…

Q: Suppose a data set is strongly skewed to the left. Which statement is true? The mean will be larger…

A: It is given that the data set is strongly skewed to the left.

Q: The variable personal desire for aggressive treatment is?

A: Aggression is a typical mental illness. This can be caused because of emotional instability due to…

Q: Suppose a student did a research project to examine whether the genre of music produces different…

A: Given: n1 = 15 n2 = 23 X1 = 55 X2 = 51 S = 0.06 Formula Used: Test-statistic t = X1-X2S1n1+1n2

Q: 18. Jerry scored 80, 85, 87, and 88 on his irst four tests in science. Which is the score on his…

A: Solution: The objective is to find the fifth score

Q: Say you have a collection of tomato plants, which you measured both in terms of height (inches) and…

A: Z score :  Z - score = ( x - mean)/standard deviation  For any data ,  As x changes , value of z…

Q: A researcher records the gender of each child born in the county hospital during the month of June.…

A:

Q: What type of relationship exists between the two variables x and y in the scatter plot? A.Positive…

A: What type of relationship exists between the two variables x and y in the scatter plot?

Q: Find the relationship between the two variables in the given data. X 1 2 3 4 20 16 12 8 If one…

A:

Q: Hospitals with more beds cause longer lengths of collected: the number of beds each hospital has…

A: Given : A health organization collects data on hospitals in a large metropolitan area. The…

Q: I finished first in the high jump and third in the pole vault. determine whether the data described…

A: Nominal Data- Take more than 2 values but these values are not ordered –there is no natural ordering…

Q: Which of the 2 predictors, Gest or Weight, is a better predictor of Height?

A: Solution:

Q: What is the dependent and independent variable in the sentence below?   What is the relationship…

A: Dependent variable: is the effect. Its value depends on changes in the independent variable.…

Q: A school district reports that out of the 4586 teachers who have retired, the mean number of years…

A: Given that: Population size, N=4586 Mean number of years served by teacher is, μ=28.7 Population…

Q: A negative correlation indicates that as the values of one variable increase, the values of a second…

A: The statement is asking whether a negative correlation between two variables means that as one…

Q: For each of these variables, which of the mean, median, or mode would be the best choice to describe…

A: The mean, median, and mode are the most widely used measures of central tendency that are used to…

Q: A sports columnist wishes to portray baseball players as overpaid. Which measure of center should he…

A: Given the  sports columnist wishes to portray baseball players as overpaid.

Q: L3Q8.Find the type of relationship that exists between the two variables x and y in the scatter…

A: Firstly make a x and y data table from the scatter plot.  Then use correlation coefficient concept…

Q: There are five numbers in a data set. They are 3, 1, 16, 20 and x, where x is one of the largest two…

A: The value of x is one of the largest two number of the five. that is, the x value must be greater…

Q: A linear program has already been formulated for you. Use Excel to solve the LP and answer the…

A: Given :- A linear program has been formulated for you. Minimize cost :  3X + 7Y 9X + 3Y ≥ 364X + 5Y…