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Cisco Finesse X View Assessment * Content X 5 MA135 X Homework Help - Q&A from Onl x + X @ File | C:/Users/rodeleo/Downloads/MA135_REV_FIN%20-%20Tagged.pdf E MA135 1 /4 - 100% + 2. Use the frequency distribution below to calculate the percent (by brand) of personal computers owned by the students at the University of Feenix: BRAND FREQUENCY PERCENT DELL 2,600 SONY 7,200 HEWLETT-PACKARD .000 TOSHIBA 5,600 GATEWAY 3,600 3. The cross-tabulation below compares attitudes of different age groups toward chocolate: AGE OF PARTICIPANT 0 - 20 21 - 40 OVER 40 | TOTAL LOVES CHOCOLATE 263 472 355 1090 2 HATES CHOCOLATE 34 89 73 96 TOTAL 297 561 428 1286 (a) Which is the independent variable ? ( b ) What percent of the sample loves chocolate ? (c) What percent of the over 40's hate chocolate ? (d) Which group has the greatest tendency to love chocolate ? 13 - . . . . . . . . . ..Cisco Finesse X View Assessment x Content X 5 MA135 X *Homework Help - Q&A from Onl x + X C @ File | C:/Users/rodeleo/Downloads/MA135_REV_FIN%20-%20Tagged.pdf E MA135 3 / 4 - 100% + 6. For a study of the effectiveness of incarceration for driving while intoxicated (DWI), the following sample of prison sentences (in months) is tabulated: 7 3 11 9 12 5 9 5 8 (a) Calculate the range. (b) Calculate the variance. (c) Calculate the standard deviation. 2 7. The residents of a college dormitory are questioned about their attitudes regarding total nuclear disarmament. The results are as follows: FAVOR 128 NEUTRAL 226 3 OPPOSE 503 Determine the probability of randomly selecting a student who is: - . . . . . . . . ... (a) Opposed to total nuclear disarmament. ( b ) Neither opposed nor in favor.Cisco Finesse X View Assessment * Content X 5 MA135 X *Homework Help - Q&A from Onl x + X C @ File | C:/Users/rodeleo/Downloads/MA135_REV_FIN%20-%20Tagged.pdf E MA135 3 / 4 - 100% + 8. Scores on the SAT exam approximate a normal distribution with / =500 and o =100. Use this distribution to determine: (a) The z score for an SAT score of 750. ( b ) The percentage of SAT scores that fall above 600. (c) The z score for an SAT score of 425. (d) The percentage of SAT scores that fall between 400 and 500. 9. Budget Rent-a-car must measure the mean gas mileage achieved by its rental cars. The data below is generated for the entire fleet of 24 vehicles. The 4 boxed numbers constitute a randomly drawn sample. 2 21 20 38 41 36 34 36 34 30 37 28 22 33 27 30 31 36 33 37 29 30 35 35 (a) Compute the population mean. (b ) Compute the sample mean. 10. The standard deviation of the population of IQ scores is standardized to be 15 3 points. Calculate the standard error of the mean for: (a) a sample size of 10 - . . . . . . . . ... (b) a sample size of 25Cisco Finesse X View Assessment * Content X 5 MA135 X *Homework Help - Q&A from Onl x + X C @ File | C:/Users/rodeleo/Downloads/MA135_REV_FIN%20-%20Tagged.pdf E MA135 4/4 100% + 11. A medical study followed a sample of 12 heart patients who had received electronic pacemakers. The time (in months) to the first electrical malfunction was recorded: 16 24 20 16 32 14 22 8 24 6 10 (a) Calculate the estimated standard error of the mean. ( b ) Determine the critical value of t for a = .05 (c) Find the 95% confidence interval for the population mean. 2 12. Each of the following statements is involved as a claim in a hypothesis test. Identify each claim as the null hypothesis or the alternative hypothesis: (a) Bayer Aspirin and generics contain the same amount of the active ingredient. ( b ) Female employees earn less than male employees with equivalent responsibilities. (c) American swimmers are at least as fast as Russian swimmers. (d) Ingesting vitamin C has no effect on IQ level. 3 -...... . . . .. 13. Two new drugs are being compared for effectiveness in lowering total cholesterol levels. On a sample of 10 subjects, drug A is found to lower total cholesterol by an average of 75 mg/dl with SS = 2025. On a sample of 20 subjects, drug B lowered the mean cholesterol level by 80 mg/dl with SS = 2736. Use a 0.05 level of significance to test the claim that the two drugs are equally effective.Cisco Finesse X View Assessment * Content X 5 MA135 X *Homework Help - Q&A from Onl x + X C @ File | C:/Users/rodeleo/Downloads/MA135_REV_FIN%20-620Tagged.pdf E MA135 4 1 - 100% + 12. Each of the following statements is involved as a claim in a hypothesis test. Identify each claim as the null hypothesis or the alternative hypothesis: (a) Bayer Aspirin and generics contain the same amount of the active ingredient. ( b ) Female employees earn less than male employees with equivalent responsibilities. (c) American swimmers are at least as fast as Russian swimmers. ( d) Ingesting vitamin C has no effect on IQ level. 13. Two new drugs are being compared for effectiveness in lowering total cholesterol levels. On a sample of 10 subjects, drug A is found to lower total cholesterol by an average of 75 mg/dl with SS = 2025. On a sample of 20 subjects, drug B 2 lowered the mean cholesterol level by 80 mg/dl with SS = 2736. Use a 0.05 level of significance to test the claim that the two drugs are equally effective. (a) The null hypothesis (Ho) ( b ) The alternative hypothesis (Hi) (c ) The critical value (d) The test statistic 3 (e) Your decision about Ho (f) Your conclusion about the claim -...... . . . ..Cisco Finesse X View Assessment Discussion X 5 MA135 X *Homework Help - Q&A from Onl x + X Close