Which has an adverse effect on a correlation coefficient on the below selections: a. restricting the range of possible scores b. too many people in your experiment c. None  d. the scores on one variable have larger numbers than the other variable e. a negative relationship between your X and Y variables

For each of a number of cities across Canada, the number of people with Cantonese as a mother tongue and the number of people with Mandarin as a mother tongue were rocorded. A scatterplot of the data is shown in the figure below. The correlation between the number of Cantonese speakers in a city aud the number of Mandarin speakers is 0.980. Do you think this correlation is a reasonable summary of the relationship? Why, or why not? (a) If the two largest cities (Toronto and Vancouver) were removed, the correlation would be even higher. (b) No, because there are outliers and/or influential points. (c) Yes, because the relationship is more or less linear. (d) No, because the relationship is clearly curved. (e) Yes, because there are no influential points.

Use the data set below to answer the following questions where weight is your independent variable and MPG is your dependent variable: 4. Give a predicted value of yˆfor a value of the explanatory variable which is not an actual observation in your data set. 6. What is the correlation coefficient, r? Interpret r.

A group of 20 smokers were asked for their age and the number of cigarettes they smoked in a certain time period. Let A, be the age recorded and X; the number of cigarettes for each smoker, for i = 1 to 10. The following information is also available: £4, = - 669 , Σ X -74.9 , ΣΑ34,561.0. Ex? = 468.45, EA;X; = 3492.7.

The following four data pairs have been obtained (1,5), (2,6), (4,9), (5,11). Without carrying out any calculations, which of the following correlation coefficients best describe the relationship between x and y Select one: a. 0.25 b. 0.98 C. -0.25 d. -0.98

Q5. Crickets and TemperatureFind the best predicted temperature at a time when a cricket chirps 3000 times in 1 minute. Whatis wrong with this predicted temperature?Chirps in 1min882 1188 1104 864 1200 1032 960 900Temperature0?69.7 93.3 84.3 76.3 88.6 82.6 71.6 79.6 a) Find the value of the linear correlation coefficient ?b) Find the critical values of r from table A-6 using ∝= 0.05c) Determine whether there is sufficient evidence to support a claim of a linear correlationBetween the two variables.d) Find the regression equation,e) Letting the first variable be the predictor (x) variable, find the indicated predicted value.

Pllzz explain all question.. Ty.

q15

A student wants to compute the correlation coefficient with two data pairs. What value or values of r should he expect? A. -1 B. 1 C. 0 D.|1| Given a set of paired data (X,Y), if Y is dependent on X, then what value of a correlation coefficient wouldyou expect? A. -1 B. 1 C. 0 D.|1|

Statistics Question