A police department is deciding whether to deploy extra cars to monitor for speeding along a...
A police department is deciding whether to deploy extra cars to monitor for speeding along a certain stretch of highway. The police department will base its decision on whether more than 20% of vehicles on that stretch travel at speeds greater than 10 miles per hour over the posted speed limit. From a random sample of 150 cars on that stretch of highway, 39 are found to be traveling at speeds greater than 10 miles per hour over the posted speed limit. What is the p-value for the appropriate hypothesis test? Round your answer to three decimal places.
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A police department is deciding whether to deploy extra cars to
monitor for speeding along a...
3. The distribution of passenger vehicle speeds on the Interstate 5 Freeway is nearly normal with a mean of 72.6 mi/hr and a standard deviation of 4.78 mi/hr. (Use the Normal Table). Round all percen...
3. The distribution of passenger vehicle speeds on the Interstate 5 Freeway is nearly normal with a mean of 72.6 mi/hr and a standard deviation of 4.78 mi/hr. (Use the Normal Table). Round all percents to the nearest tenth. What percent of passenger vehicles travel slower than 80 miles per hour? a. b. What percent of passenger vehicles travel between 60 and 80 miles per hour? How fast do the fastest 5% of passenger vehicles travel? C. d. The speed...
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of...
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 64 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 59 miles per hour and 69 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately % of vehicles travel between 59 miles per hour and 69 miles per hour.
Bringing all of section 6.2 together... The distribution of passenger vehicle speeds traveling on the Interstate...
Bringing all of section 6.2 together... The distribution of passenger vehicle speeds traveling on the Interstate 5 Freeway (1-5) in California is nearly normal with a mean of 72.6 miles/hour and a standard deviation of 4.78 miles/hour. (a) What percent of passenger vehicles travel slower than 80 miles/hour? % (round to two decimal places) (b) What percent of passenger vehicles travel between 60 and 80 miles/hour? % (round to two decimal places) (c) How fast do the fastest 5% of...
The State Police are trying to crack down on speeding on a particular portion of the...
The State Police are trying to crack down on speeding on a particular portion of the Massachusetts Turnpike. To aid in this pursuit, they have purchased a new radar gun that promises greater consistency and reliability. Specifically, the gun advertises ± one-mile-per-hour accuracy 91% of the time; that is, there is a 0.91 probability that the gun will detect a speeder, if the driver is actually speeding. Assume there is a 2% chance that the gun erroneously detects a speeder...
(5 points) The Highway Safety Department wants to study the driving habits of individuals. A sample...
(5 points) The Highway Safety Department wants to study the driving habits of individuals. A sample of 38 cars traveling on a particular stretch of highway revealed an average speed of 68.9 miles per hour with a standard deviation of 5.9 miles per hour. Round to 4 decimal places. 1.Calculate a 99% confidence interval for the true mean speed of all cars on this particular stretch of highway. ( , ) 2. Based on the confidence interval do you think...
(3 points) The Highway Safety Department wants to study the driving habits of individuals. A sample...
(3 points) The Highway Safety Department wants to study the
driving habits of individuals. A sample of 28 cars traveling on a
particular stretch of highway revealed an average speed of 69.9
miles per hour with a standard deviation of 4.2 miles per hour.
Round to 4 decimal places.
1.Calculate a 95% confidence interval for the true mean speed of
all cars on this particular stretch of highway.
( , )
2. What sample size is needed to estimate the...
Speeding Fine Calculator You have been hired by the police department of the city you live...
Speeding Fine Calculator You have been hired by the police department of the city you live in to create a program to calculate the fine that a motorist could pay. If the motorist was travelling at or below the speed limit, there is no fine. If the motorist is travelling over the speed limit, the amount of the fine is determined based on the table below. The speed limit that will be entered is a multiple of 5 from 5...
The police department of a major city needs to update its budget. For this purpose, they...
The police department of a major city needs to update its budget. For this purpose, they need to understand the variation in their fines collected from motorists for speeding. As a sample, they recorded the speeds of cars driving past a location with a 25 mph speed limit, a place that in the past has been known for producing fines. The mean of 100 representative readings was 28.77 mph, with a standard deviation of 3.42 mph. a) How many standard...
Can you please show your work. The State Police are trying to crack down on speeding...
Can you please show your work. The State Police are trying to crack down on speeding on a particular portion of the Massachusetts Turnpike. To aid in this pursuit, they have purchased a new radar gun that promises greater consistency and reliability. Specifically, the gun advertises +- one-mile-per-hour accuracy 93% of the time; that is, there is a 0.93 probability that the gun will detect a speeder, if the driver is actually speeding. Assume there is a 1% chance that...
The police department of a major city needs to update its budget For this purpose, they...
The police department of a major city needs to update its budget For this purpose, they need to understand the variation in their fines collected from motorists for speeding As a sample, they recorded the speeds of cars driving past a location with a 30 mph speed limit, a place that in the past has been known for producing fines. The mean of 100 representative readings was 33.74 mph, with a standard deviation of 3.26 mph a) How many standard...
3. The distribution of passenger vehicle speeds on the Interstate 5 Freeway is nearly normal with a mean of 72.6 mi/hr and a standard deviation of 4.78 mi/hr. (Use the Normal Table). Round all percents to the nearest tenth. What percent of passenger vehicles travel slower than 80 miles per hour? a. b. What percent of passenger vehicles travel between 60 and 80 miles per hour? How fast do the fastest 5% of passenger vehicles travel? C. d. The speed...
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 64 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 59 miles per hour and 69 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately % of vehicles travel between 59 miles per hour and 69 miles per hour.
Bringing all of section 6.2 together... The distribution of passenger vehicle speeds traveling on the Interstate 5 Freeway (1-5) in California is nearly normal with a mean of 72.6 miles/hour and a standard deviation of 4.78 miles/hour. (a) What percent of passenger vehicles travel slower than 80 miles/hour? % (round to two decimal places) (b) What percent of passenger vehicles travel between 60 and 80 miles/hour? % (round to two decimal places) (c) How fast do the fastest 5% of...
(3 points) The Highway Safety Department wants to study the
driving habits of individuals. A sample of 28 cars traveling on a
particular stretch of highway revealed an average speed of 69.9
miles per hour with a standard deviation of 4.2 miles per hour.
Round to 4 decimal places.
1.Calculate a 95% confidence interval for the true mean speed of
all cars on this particular stretch of highway.
( , )
2. What sample size is needed to estimate the...
The police department of a major city needs to update its budget For this purpose, they need to understand the variation in their fines collected from motorists for speeding As a sample, they recorded the speeds of cars driving past a location with a 30 mph speed limit, a place that in the past has been known for producing fines. The mean of 100 representative readings was 33.74 mph, with a standard deviation of 3.26 mph a) How many standard...
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