Unit 4 quiz notes

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Classify the following as either a discrete random variable or a continuous random variable. The income per household in a sample of households Answer B8 Tables | B Keypad Keyboard Shortcuts [ U Correct — — Classify the following as either a discrete random variable or a continuous random variable. The highway miles per gallon for an automobile. Answer Classify the following as either a discrete random variable or a continuous random variable. A phone usage study records the time spent on the phone each day for 189 randomly selected individuals. Answer
Question 1074, Step 1011 Correct Which of the following is a good point estimator for the population standard deviation? Answer For a quantitative variable in a particular population, how many different sample means are there? Answer
Question 3 of 4, Step 10f1 Correct O Which of the following is a good point estimator for the population variance? Answer Point Estimators Vs Population Values [ veasure _____[symbol | Population mean 4 (mu) 2(sigma squared) Sample mean Population variance e Population standard & (little sigma) deviation Sample variance Sample standard deviation Population proportion p (rho) Sample proportion
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Jentify the sampling technique used for the following study. A statistics student interviews each member from each of the five randomly chosen math classes at a university. aswer
Identify the sampling technique used for the following study. A polister interviews every fifteenth member from the entire sampling frame. Answer dentify the sampling technique used for the following study. Apolister interviews the first ten students to arrive. inswer 3 Tables Keybo
Question2 ~ | of 14, Step 10f 1 88.10% (37.00/42.00) Select the scenario which is an example of simple random sampling. 00:04:50 Answer 2 out of 2 Points Open Tutor Identify the sampling technique used for the following study. Amarket researcher interviews every tenth member from the entire population Answer QNTCgYEWES 2 out of 2 Points Questions ~ of 14, Step 10of 1 88.10% (37.00/42.00) 00:01:01 Answer probability that the diameter of a selected bearing s greater than 57 millimeters. Round your answer to four decimal places. Correct Answer The diameters of ball bearings are distributed normally. The mean diameter is 52 millimeters and the standard deviation is 4 millimeters. Find the 3 out of 3 Points Open Tutor use the arrow keys to find the appropriate cellin the table and select it using the Space key. If you would like to look up the value in a table, select the table you want to view, then either click the cell at the intersection of the row and column or 0.10565
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Identiy the sampling technique used Tor the following stuay. A polister interviews the last five members to arrive. Answer 2 out of 2 Points Find the area under the standard normal curve to the right of z = 0.52. Round your answer to four decimal places, if necessary. Open Tutor Answer 0 out of 3 Points. If you would like to look up the value in a table, select the table you want to view, then either click the cell at the intersection of the row and column « use the arrow keys to find the appropriate cellin the table and select it using the Space key. 0.6985 Normal Table = to —z Normal Table = to z Correct Answer: 0.3015
Question 12 + | of 14, 5tep 50 5 88.10% (37.00/42.00) Consider the following data: PX=x)|02|03]|02]|01]02 Copy Data Step 5 of 5: Find the value of P(X > 5). Round your answer to one decimal place. Answer S TP Open Tutor o
Question 12 + | of 14, Step 4 of 5 88.10% (37.00/42.00) 00:08:26 Consider the following data: PX=x)|02|03]|02]01]02 Copy Data Step 4 of 5: Find the value of P(X > 5). Round your answer to one decimal place. Answer 2 out of 2 Points Open Tutor 08 Next Question 14 ~ of 14, Step 1 of 1 88.10% (37.00/42.00) Classify the following as either a discrete random variable or a continuous random variable. The weights of 89 newborn babies at a local hospital. Answer 2 out of 2 Points
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