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
orchestra answered 2 years agoRelated 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...
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