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?

The weights (in pounds) of 30 newborn babies are listed below. Find 

Assume that a researcher randomly selects 14 newborn babies and counts the number of girls selected, . The probabilities corresponding to the 15 possible values of are summarized in the given table. Answer the question using the table.                       Probabilities of Girls Find the probability of exactly 5 girls. [five] Find the probability of 9 or more girls. [9ormore]

For the following binomial distribution, give the minimum usual value and the maximum usual value.  Round your answers to two decimal places.                   n = 93, p = 0.24 minimum usual value [min] maximum usual value [max]

A company considers the production process to be out of control when defects exceed 3%. In a random sample of 85 items, the defect rate is 5.9% but an employee claims that this is only a sample fluctuation and production is not really out of control. The company claims that this is evidence the production process is out of control and the defect rate is greater than 3%. Test the company’s claim at the .01 level of significance. The alternative hypothesis is p [alt] .03 (type , or =/) The p-value is [pvalue] (round to 4 decimal places) The test statistic is z=[test] (round to 2 decimal places) What is your conclusion about the company’s claim? [conclusion]  s = support the company’s claim r = reject the company’s claim f = fail to reject the company’s claim n = not enough evidence to support the company’s claim