Question

In: Statistics and Probability

A study was made of seat belt use among children who were involved in car crashes...

A study was made of seat belt use among children who were involved in car crashes that caused them to be hospitalized. It was found that children not wearing any restraints had hospital stays with a mean of 7.37 days and a standard deviation of 0.75 days with an approximately normal distribution.

(a) Find the probability that their hospital stay is from 5 to 6 days, rounded to five decimal places.

(b) Find the probability that their hospital stay is greater than 6 days, rounded to five decimal places.

Solutions

Expert Solution



Related Solutions

A study was made of seat belt use among children who were involved in car crashes...
A study was made of seat belt use among children who were involved in car crashes that caused them to be hospitalized. It was found that children not wearing any restraints had hospital stays with a mean of 7.37 days and a standard deviation of 2.75 days with an approximately normal distribution. (a) Find the probability that their hospital stay is from 5 to 6 days, rounded to five decimal places. (b) Find the probability that their hospital stay is...
A study was made of seat belt use among children who were involved in car crashes...
A study was made of seat belt use among children who were involved in car crashes that caused them to be hospitalized. It was found that children not wearing any restraints had hospital stays with a mean of 7.37 days and a standard deviation of 2.75 days with an approximately normal distribution. (a) Find the probability that their hospital stay is from 5 to 6 days, rounded to five decimal places. (b) Find the probability that their hospital stay is...
A study was made of seat belt use among children who were involved in car crashes...
A study was made of seat belt use among children who were involved in car crashes that caused them to be hospitalized. It was found that children not wearing any restraints had hospital stays with a mean of 7.37 days and a standard deviation of 1.50 days with an approximately normal distribution. (a) Find the probability that their hospital stay is from 5 to 6 days, rounded to five decimal places. (b) Find the probability that their hospital stay is...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2771occupants not...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2771occupants not wearing seat​ belts, 38 were killed. Among 7702 occupants wearing seat​ belts, 15 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts​ (a) through​ (c) below. a) identify test statistic b) identify the p-value c) identify confidence interval
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2946occupants not...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2946occupants not wearing seat belts, 31 were killed. Among 7602 occupants wearing seat belts, 16were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.    a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2500 occupants...
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2500 occupants not wearing seat belts, 15 were killed. Among 7500 occupants wearing seat belts, 15 were killed. Use this data with 0.05 significance level to test the claim that the fatality rate is higher for those not wearing seat belts. (Write all necessary steps like Hypotheses, Test Statistic, P-value & Conclusion) Given that P(z<3.17)=0.9992.
A simple random sample of? front-seat occupants involved in car crashes is obtained. Among 27542754 occupants...
A simple random sample of? front-seat occupants involved in car crashes is obtained. Among 27542754 occupants not wearing seat? belts, 3535 were killed. Among 78147814 occupants wearing seat? belts, 1818 were killed. Use a 0.010.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts? (a) through? (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2901 occupants...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2901 occupants not wearing seat​ belts,27 were killed. Among 7877 occupants wearing seat​ belts,16 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts​ (a) through​ (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2991 occupants...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2991 occupants not wearing seat​ belts, 28 were killed. Among 7768 occupants wearing seat​ belts, 16 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts​ (a) through​ (c) below. a. Test the claim using a hypothesis test. b. Identify the test statistic c. P-value d. Confidence interval
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2989 occupants...
A simple random sample of​ front-seat occupants involved in car crashes is obtained. Among 2989 occupants not wearing seat​ belts, 29 were killed. Among 7785 occupants wearing seat​ belts, 12 were killed. Use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to be the sample of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT