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Discussion - Nausea from air sickness Chapter 3, Section 3.1, Problem 2a 1. Nausea from air sickness affects some travelers. A drug company, wanting to establish the effectiveness of its motion sickness pill, randomly gives either its pill or a look-alike sugar pill (placebo) to 200 passengers. Complete the marginal totals. Degree of Nausea None Slight Moderate Severe Total Pill 46 34 17 3 100 Placebo 18 32 36 14 100 Total 2. Chapter 3, Section 3.1, Problem 2b Nausea from air sickness affects some travelers. A drug company, wanting to establish the effectiveness of its motion sickness pill, randomly gives either its pill or a look-alike sugar pill (placebo) to 200 passengers. Degree of Nausea None Slight Moderate Severe Total Pill 44 34 16 6 100 Placebo 22 33 34 11 100 Calculate the relative frequencies separately for each row. Round your answers to two decimal places. Degree of Nausea None Slight Moderate Severe Total Pill 1.00 Placebo 1.00 3. Chapter 3, Section 3.1, Problem 01a Nausea from air sickness affects some travelers. A drug company, wanting to establish the effectiveness of its motion sickness pill, randomly gives either its pill or a look-alike sugar pill (placebo) to 200 passengers. Complete the marginal totals. Degree of Nausea None Slight Moderate Severe Total Pill 45 36 17 2 100 Placebo 19 34 33 14 100 Total 4. Chapter 3, Section 3.1, Problem 01b Nausea from air sickness affects some travelers. A drug company, wanting to establish the effectiveness of its motion sickness pill, randomly gives either its pill or a look-alike sugar pill (placebo) to 200 passengers. Degree of Nausea None Slight Moderate Severe Total Pill 43 35 19 3 100 Placebo 21 33 32 14 100 Calculate the relative frequencies separately for each row. Round your answers to two decimal places. Degree of Nausea None Slight Moderate Severe Total Pill 1.00 Placebo 1.00 5. Chapter 3, Section 3.4, Problem 17 If the value of r is small, can we conclude that there is not a strong relationship between the two variables? 6. Chapter 3, Section 3.4, Problem 19a The concentrations of the sex steroids estradiol and testosterone in the blood of male alligators from Lake Apopka were determined by radioimmunoassay. The resulting data are given in the table below: Male Alligators estradiol concentration (pg/ml) testosterone concentration (pg/ml) 50 18 23 24 53 8 37 6 30 7 Make a scatter diagram of the pairs of concentrations for the male alligators. Graph 1 Graph 2 Graph 3 Choose the correct graph number from the table above: Calculate the sample correlation coefficient for males. Round the answer to three decimal places. r = 7. Chapter 3, Section 3.4, Problem 2 Calculations from a data set of n = 34 pairs of (x,y) values have provided the following results: , Obtain the correlation coefficient. Round your answer to three decimal places. r= 8. Chapter 3, Section 3.4, Problem 25 Heating and combustion analyses were performed in order to study the composition of moon rocks. Recorded here are the determinations of hydrogen (H) and carbon (C) in parts per million (ppm) for 11 specimens. Hydrogen (ppm) 120 94 90 8 38 20 2.8 66 2.0 20 85 Carbon (ppm) 105 110 99 22 50 35 7.3 74 7.7 45 51 Calculate r. Round your answer to three decimal places. 9. Chapter 3, Section 3.5, Problem 37a A store manager has determined that the monthly profit y realized from selling a particular brand of car battery is given by y = 9x − 155 where x denotes the number of these batteries sold in a month. If 43 batteries were sold in a month, what was the profit? y = 10. Chapter 3, Section 3.5, Problem 37b A store manager has determined that the monthly profit y realized from selling a particular brand of car battery is given by y = 12x − 155 where x denotes the number of these batteries sold in a month. At least how many batteries must be sold in a month in order to make a profit? (Give a whole number.) x =
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Nausea from air sickness
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