An Old Medical Textbook States That The Mean Sodium Level For Healthy Aduits Is 141 Meq Per Liter Of Blood A Medical Re 1 (36.34 KiB) Viewed 33 times
An Old Medical Textbook States That The Mean Sodium Level For Healthy Aduits Is 141 Meq Per Liter Of Blood A Medical Re 2 (55.68 KiB) Viewed 33 times
An old medical textbook states that the mean sodium level for healthy aduits is 141 mEq per liter of blood. A medical researcher believes that, because of modern dietary habits, the mean sodium level for healthy adults, μ, now differs from that given in the textbook. A random sample of 150 healthy adults is evaluated. The mean sodium level for the sample is 142 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 13 mEq. Can we conclude, at the 0.01 level of significance, that the population mean adult sodium level differs from that given in the textbook? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H₁. Ho D H₁:0 (b) Determine the type of test statistic to use. Z (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the p-value. (Round to three or more decimal places.) 0 (e) Can we conclude that the population mean adult sodium level differs from that given in the textbook? OYes No μ Ex a s P <Q 0-0 050 020 ODD<>D ? Español T FER
9 - 10 11 Theater revenue, x (in millions of dollars) 12 20.0 28.9 61.2 14.2 36.9 27.3 24.6 6.4 59.8 66.7 44.2 49.7 25.0 31.2 12.7 13 Rental revenue, y (in millions of dollars) 6.2 3.4 10.0 Can movie rental revenue be predicted? A movie studio wishes to determine the relationship between the revenue from rental of comedies on streaming services and the revenue generated from the theatrical release of such movies. The studio has the following bivariate data from a sample of fifteen comedies released over the past five years. These data give the revenue x from theatrical release (in millions of dollars) and the revenue y from streaming service rentals (in millions of dollars) for each of the fifteen movies. Also shown are the scatter plot and the least-squares regression line for the data. The equation for this line is y-3.89 +0.14x. 1.8 12.9 12.2 8.8 2.7 16.8 9.5 7.2 14 16.4 7.6 5.8 10.6 Send data to Excel 15 Rental revenue (in millions of dollars) 16 Send data to calculator Based on the studio's data and the regression line, complete the following. -17 Theater revenue (in millions of dollars) (a) For these data, values for rental revenue that are greater than the mean of the values for rental revenue tend to be paired with values for theater revenue that are the mean of the values for (Choose one) theater revenue. (b) According to the regression equation, for an increase of one million dollars in theater revenue, there is a corresponding increase of how many million dollars in rental revenue? 0 18 G a Español D
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