Which is better, a score of 92 on a test with a mean of 71 and a standard deviation of 15, or a score of 688 on a test with a mean of 493 and a standard deviation of 150? 

Select the correct sampling method for each of the samples described below. A large school district includes 15 high schools.  The district selects 10 teachers from each high school and asks their opinon about a new curriculum. [one]   A retail chain has 1503 locations.  Human Resources randomly selects 25 stores and asks all the employees at each of these stores their opinion about a new company policy. [two]   A bicycle manufacturing facility selects every 65th frame from the assembly line and inspects it to make sure it meets specifications. [three]   All students in a class are assigned a number from 1 – 32.  Five students are randomly selected using a random number generator. [four]

Assume that the weight loss for the first month of a diet program is normally distributed with a mean of 11 pounds and a standard deviation of 4 pounds.  Find the probability a randomly selected person loses between 10 and 14 pounds during the first month on the diet program.  Give an answer rounded to 4 decimal places.

The table shows a stem-and-leaf diagram for the test scores of students in a Liberal Arts Math course.  How many scores are recorded in this stem and leaf plot? [one] What is the highest score in the plot? [two] How many students earned the highest score? [three]

The following frequency distribution shows the length of several observed conversations.       What is the upper class boundary for the range of 10-14? [upper] What is the class width? [width]

Multiple choice questions on a test each have 4 possible answers, one of which is correct.  Assume that you guess the answers to 3 such questions. Use the multiplication rule to find the probability that the first two guesses are wrong and the third guess is correct.  That is, find P(WWC) where W denotes a wrong answer and C denotes a correct answer.  Round your answer to 4 decimal places. [WWC] On your scratch paper, make a complete list of the different possible arrangements of 2 wrong a 1 correct answer.  What is the probability of each combination?  Round to 4 decimal places. [comb] What is the probability of getting exactly 1 correct answer when 3 guesses are made?  Round to 4 decimal places. [one]

  What is the 5 number summary for the data set above? [min],  [q1],  [median],  [q3], [max]    

The size of the last 12 graduating classes of a certain high school are given below. 227 239 215 219 221 233 229 233 235 228 245 231 Mean:  [mean] Median:  [median] Standard Deviation:  [std] Round each answer to the nearest tenth as needed.

In a sample of 1,047 randomly selected adults, 38% said they did not intend to vote in the next election. How many adults in the survey said they did not intend to vote? [one]   In one of Mendel’s experiments with green and yellow peas, 123 out of 515 peas were yellow. What percentage of the peas were yellow?  Round to the nearest tenth of a percent. [two]%   Last year an airline reported that a specific flight was delayed 47 times. This year they reported a 13% reduction in delays for the same flight.  How many times was the flight late this year? [three]

Does the table below represent a valid probability distribution?