Statistics and Probability questions and answers in July 2021

A) Listed are 29 ages for Academy Award winning best actors in order from smallest to largest. 18 21 22 25 26 27 29 30 31 33 36 37 41 42 47 52 55 57 58 62 64 67 69 71 72 73 74 76 77 Find the 78th perc...
1.     A researcher conducted a study and correlated two variables of interest. His obtained correlation coefficient was -0.87 and was statistically significant (p=.00001). If the two variables b...
1.     True or False: The expected values used in computing chi square statistics are derived from row and column marginal statistics.       2.     When interpreting the results from a Re...
1.     Which of the following graphical methods can help you judge the normality assumptions of your data? A.    Stem and leaf B.    Histogram C.     Box and Whiskers plot D.    ...
An investment opportunity has the following statistics: mean = 32.08 variance = 12.1   What is the value of the coefficient of determination, in PERCENTAGE FORM: Please give your answer correctly rou...
Canadian postal codes are of the form "letter number letter number letter number," such as K2N 3P8. In the province of Ontario all postal codes must begin with K, L, M, N, or P. How many postal codes ...
According to a travel​ website, workers in a certain country lead the world in vacation​ days, averaging 22.56 days per year. The following data show the number of paid vacation days for a rando...
A mayor running for re-election claims that during his term, average municipal taxes have fallen by $200. A conscientious statistician wants to test this claim. She surveys 36 of her neighbors and fin...
You have a craving for Mrs. Fields gourmet cookies. You have a choice of oatmeal raisin, macadamia nut, triple chocolate, cinnamon sugar, chocolate chip, and peanut butter. If you must choose at least...
Y = Yearly Income (measured in thousands of dollars) X = 1 if someone has a Bachelors degree or higher and 0 otherwise You obtain the following regression equation from your analysis: yhat = 31.6 + 1...
Research Question: Has the number of people who support a minimum wage changed?   It is known 65% of people support a higher minimum wage.   A sample is collected of 930 people and 603 of them repor...
Research Question: Is there a difference in the number of people who have an Annual pass to Disney World comparing people who live in Florida to those who do not.   People who live in Florida (Group ...
Five males with an​ X-linked genetic disorder have one child each. The random variable x is the number of children among the five who inherit the​ X-linked genetic disorder. Determine whether a ...