Question
In: Statistics and Probability
A car insurance company suspects that the younger the driver is, the more reckless a driver...
A car insurance company suspects that the younger the driver is, the more reckless a driver he/she is. They take a survey and group their respondents based on age. Of 217 respondents between the ages of 16-25 (Group 1), 183 claimed to wear a seat belt at all times. Of 398 respondents who were 26+ years old (Group 2), 322 claimed to wear a seat belt at all times. Find a 95% confidence interval for the difference in proportions. Can it be concluded that there is a difference in the proportion of drivers who wear a seat belt at all times based on age group?
Enter the confidence interval - round to 3 decimal places.
Solutions
orchestra answered 2 years agoRelated Solutions
car insurance company suspects that the younger the driver is, the more reckless a driver he/she...
car insurance company suspects that the younger the driver is,
the more reckless a driver he/she is. They take a survey and group
their respondents based on age. Of 217 respondents between the ages
of 16-25 (Group 1), 183 claimed to wear a seat belt at all times.
Of 398 respondents who were 26+ years old (Group 2), 322 claimed to
wear a seat belt at all times. Find a 95% confidence interval for
the difference in proportions. Can it...
A car accident expert is assigned to a case where the insurance company suspects the car...
A car accident expert is assigned to a case where the insurance
company suspects the car company to use lower quality steel (lower
TS) than the standards in their bumpers. The expert is given a
post-crash bumper to run his test on. Since the bumper is
completely deformed, he cannot place it into the normal bumper
tensile tester. He is thinking about running a hardness test on the
deformed bumper to estimate the TS of the steel to test the...
You, a car accident investigation expert, are assigned a case where the insurance company suspects that...
You, a car accident investigation expert, are assigned a case
where the insurance company suspects that the car company did not
properly account for the fatigue failure when designing the axle of
their car. You are given a sample of a broken front-right axle to
determine if the axle failure was a fatigue failure. You were told
that the axle broke when the car traveling at 45 mph hit a pothole
in the road. How will you most efficiently determine...
The claims department at Wise Insurance Company believes that younger drivers have more accidents and, therefore,...
The claims department at Wise Insurance Company believes that
younger drivers have more accidents and, therefore, should be
charged higher insurance rates. Investigating a sample of 1,200
Wise policyholders revealed the following breakdown on whether a
claim had been filed in the last 3 years and the age of the
policyholder. Is it reasonable to conclude that there is a
relationship between the age of the policyholder and whether or not
the person filed a claim? Use the .05 significance...
An insurance company insures two drivers, a safe driver and a risky driver. There is an...
An insurance company insures two drivers, a safe driver and a
risky driver. There is an 8.5% chance the risky driver has an
accident in a given year, in which case the cost (payout) to the
company would be $1,000,000. The safe driver has a 1% chance of an
accident, which costs the company $500,000. What is the expected
payout (i.e., for accidents) to the company from insuring these two
people?
'driver', 'car', 'accident' and 'report' are names of some tables in the insurance database system. These...
'driver', 'car', 'accident' and 'report' are names of some
tables in the insurance database system. These tables were created
by executing the following SQL creation statements.
CREATE TABLE driver( driverID INT NOT NULL PRIMARY KEY, name
VARCHAR(30) NOT NULL, cityAddress VARCHAR(25) );
CREATE TABLE car( plateID INT NOT NULL PRIMARY KEY, model
VARCHAR(20) NOT NULL, year YEAR(4) NOT NULL );
CREATE TABLE accident( reportNumber INT NOT NULL PRIMARY KEY,
date Date NOT NULL, location VARCHAR(20) NOT NULL );
CREATE TABLE...
A health insurance company suspects a particular clinic of overcharging patients for a certain procedure. The...
A health insurance company suspects a particular clinic of
overcharging patients for a certain procedure. The insurance
company has determined that the overall mean cost for the procedure
is $1200 with a standard deviation of $220. The insurance company
sought the assistance for a statistician to perform a hypothesis
test to determine whether the clinic is overcharging patients for
the procedure. A random sample of 65 patients who received the
procedure was selected and the mean cost of the procedure...
A car insurance company has determined that the mean annual car insurance cost for a family...
A car insurance company has determined that the mean annual car
insurance cost for a family in the town of Watlington is $1716. A
researcher wants to perform a hypothesis test to determine whether
the mean insurance cost for a family in the town of Putford is
higher than this. The mean insurance cost for a random sample of 32
families in Putford was $1761. At the 10% significance level, do
the data provide sufficient evidence to conclude that the...
A car insurance company has determined that the mean annual car insurance cost for a family...
A car insurance company has determined that the mean annual car
insurance cost for a family in the town of Watlington is $1716. A
researcher wants to perform a hypothesis test to determine whether
the mean insurance cost for a family in the town of Putford is
higher than this. The mean insurance cost for a random sample of 32
families in Putford was $1761. At the 10% significance level, do
the data provide sufficient evidence to conclude that the...
A developmental psychologist suspects that first-born children tend to develop language skills faster than their younger...
A developmental psychologist suspects that first-born children
tend to develop language skills faster than their younger siblings.
An explanation for the phenomenon is that first-borns have
undivided attention from their parents. As such, it is reasonable
that twins and triplets have slower language development than
single children. The psychologist collects measures of language
skills for each child at age 3 in participating families. The data
are below. What can the psychologist conclude with an α of
0.05?
single
twins
triplets...
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