Answer Happy

Question 26 Jim rolled a 6-faced die for 29 times and recorded the numbers he obtained. The frequency of each number (1-6) is shown in the table below. Which of the following statements is false regarding sample statistics of the obtained numbers? Not yet answered Number Frequency Marked out of Relative frequency 0.034 1 1 3.00 2 5 0.172 Flag question 3 7 0.241 4 7 0.241 5 6 0.207 6 3 0.103 The 20th percentile of the sample is 2 O The sample modes are 3 and 4 The sample median is 4 The 90th percentile of the sample is 5.5
Question 27 Which of the following is an example of negative correlation? Not yet answered Marked out of If a train increases speed, the length of time to get to the final point decreases. As alcohol drinking increases, so does the number of cigarettes smoked. A student who puts in more hours of study gets better grades. As temperatures get lower, air conditioning costs decrease. 3.00 P Flag question
Question 28 Not yet An urn contains exactly three balls numbered 1, 2, and 3, respectively. Random samples of two balls are drawn (first one followed by the second) from the urn with replacement. The average, Xuv = 0.5*(X+ + X2) where X and X2 are the numbers on the selected balls, is recorded after each drawing. Which of the following describes the sampling distribution of Xv? + answered Marked out of 3.00 Xav 1 1.5 2 2.5 3 Flag question Probability 1/9 2/9 1/3 2/9 1/9 Xav 1 1.5 2 2.5 3 3 Probability 5/9 2/9 1/3 2/9 1 Xay 1 1.5 2 2.5 3 Probability 0 0 1/3 1/3 1/3 0 O Xav X 1 1.5 2 2.5 3 Probability 1/10 1/10 1/10 1/10 1/10