Grace Asher
Statistics teacher | Experienced educator in USA
I hold a degree in Statistics from UMass Chan Medical School, where my passion for unraveling the intricacies of data flourished. With a solid academic foundation, I thrive on demystifying statistical concepts for students. My goal is to make learning an engaging journey, offering clarity in subjects that often seem complex. Let's navigate the world of numbers together, turning statistical challenges into victories.
Questions
A piggy bank contains a certain number of coins, of which 53 are dimes and 19 are nickels. The remainder of the coins in the bank are quarters. If the probability of randomly selecting a quarter is #1/4#, how many quarters does the bank contain?
The probability that Tara receives spam e-mail is 15 percent. If she receives 80 e-mails in a week, about how many of them can she expect to be spam?
In a particular set of data,if you multiply each data value by 3 and then add 5, what effect will this have on the mean and standard deviation of the data set?
What is the area between z= 2.11 and z = 2.49?
How do i calculate the following properties of waiting time for bus? (almost finished, very urgent to me)
What does population distribution mean?
How many four-digit even numbers can be formed using the digits 3,4,7,8 if digits may be repeated?
What is the purpose of hypothesis testing in statistics?
What is the z-score of sample X, if #n = 256, mu= 17, St. Dev. =80, and mu_X =22#?
The probability that a DVD player produced by VCA Television is defective is estimated to be 0.07. A sample of ten players is selected at random. What is the probability that the sample contains no defective units?
A jar contains 100 marbles. There are 49 blue marbles, 7 green marbles, 27 red marbles, and 17 yellow marbles. What is the probability of randomly selecting a red marble?
On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the z-score for a person who scores 340?
What is the minimum, maximum, and range of the data 30, 24, 8, 21, 35, 23, 23, 19, 13, 17?
What is the median of the following numbers?: 13, 15, 26, 11, 26, 16, 12,
What is the mean of the following numbers: 77, 81, 75, 67, 65, 65, 60, 64, 69, 71, 65, 81?
What are the range, median, mean, and standard deviation of: {22, 12, 19, 24, 22, 21, 17, 14, 22, 20, 26, 10}?
If the mean, median, and mode are all equal for the set {3,4,5,8,x}, what is the value of x?
What is the difference between the R-Squared and adjusted R-Squared when running a regression analysis?
What are the mean and standard deviation of a binomial probability distribution with #n=5 # and #p=4/7 #?
H0: μ = 100 H1: μ ≠ 100 σ = 10,𝑛 = 100,𝑥̅ = 100,𝛼 = 0.05 Calculate the value of the test statistic, set up the rejection region, determine the p-value, interpret the result, and draw the sampling distribution. How?