The following data set represents the age of a random sample of cars on the road...
The following data set represents the age of a random sample of
cars on the road today.
1 3 3 7 10 12
The standard deviation of this sample is ________.
|
8.80 |
||
|
9.06 |
||
|
4.38 |
||
|
7.14 |
Homework Answers
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The following data set represents the age of a random sample of
cars on the road...
90) The Department of Transportation would like to test the hypothesis that the average age of...
90) The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 years. A random sample of 45 cars had an average age of 10.6 years. It is believed that the population standard deviation for the age of cars is 4.1 years. The Department of Transportation would like to set a = 0.05.
) The following data represents the age distribution of a sample of 100 people covered by...
) The following data represents the age distribution of a sample of 100 people covered by health insurance (private or government). The sample was taken in 2003. Find population standard deviation. Age Number 25 - 34 23 35 - 44 29 45 - 54 28 55 - 64 20
3. The mean age of sample of 100 cars from a certain manufacturer is found to...
3. The mean age of sample of 100 cars from a certain manufacturer is found to be eleven years. If the sample standard deviation of car ages is 5 years, give a 99% confidence interval for the mean age of cars from this manufacturer. 4. The sample standard deviation of the ages of a random sample of 40 television sets in a neighborhood is 3 years. Find a 95% confidence interval for the standard deviation of the entire population of...
The following data set represents some scores in 10 replications. Based on this daK seft answer...
The following data set represents some scores in 10 replications. Based on this daK seft answer questions Q.1 and 2: 26 56 60 21 11 27 44 23 22 60 Q.1. The data above indicate the number of cars that have been sold by a car dealer in the last 10 weeks. Draw histogram for this data and fill out following table for the same data. Relative Class Frequency 10sx30Frequency 30 sx<50 50 sx<70 Q2.2. Calculate mean and standard deviation...
6. An insurance company claims that the average automobile on the road today is less than...
6. An insurance company claims that the average automobile on the road today is less than 4 years old. A random sample of 15 cars had an average age of 5.4 years with a standard deviation of 1.1 years. Assume that the population is normally distributed. Test the claim at ∝= 0.05
What are the sample variance and sample standard deviation of the following data set: 4, 7,...
What are the sample variance and sample standard deviation of the following data set: 4, 7, 9, 10, 16? Sample standard deviation=4.4 Variance=19.7 Sample standard deviation=6 Variance= 36 Sample standard deviation=7 Variance= 49 Sample standard deviation=3 Variance= 9
A random sample o 100 cars on Fry Road recently produced the following result, for a...
A random sample o 100 cars on Fry Road recently produced the following result, for a "Z-interval for proportions, 90% confidence": 0.3012 < p(Japanese) < 0.4853". State specifically the meaning and interpretation of this statement.
2. Samples of the age in years of student cars and faculty/staff cars: Student: 10,4, 5,2,...
2. Samples of the age in years of student cars and faculty/staff cars: Student: 10,4, 5,2, 9, 7, 8, 8,7, 13, 12, n-11 Faculty: 5, 10, 4, 13, 2,3, 2, 7, 6, 6, 3, 4, n 12 Calculate the mean, median, and mode for each group. Do either of these distributions appear to be skewed? 3. The data below reflect movie viewers' recall of products/brands shown within either humorous or dramatic movies. Calculate the range, variance, and standard deviation of...
Question 12 2.5 pts The average age of cars owned by residents of Oshkosh is 4...
Question 12 2.5 pts The average age of cars owned by residents of Oshkosh is 4 years with a standard deviation of 2.2 years. A simple random sample of 400 cars is selected, and the sample mean age is computed. What is the probability that the average age of the 400 cars is less than 3.8 years? 0.0344 0.5359 0.9656 0.4641
Calculate the sample standard deviation for this data set: 88, 73, 91·The formula for the sample...
Calculate the sample standard deviation for this data set: 88, 73, 91·The formula for the sample standard deviation is where n represents the sample size, x represents each value in the data set, and represents the sample mean. \(s=\sqrt{\frac{\sum(x-\bar{x})^{2}}{n-1}}\)Step 1. Calculate the sample mean.Step 2. Calculate the deviations and the squares of the deviations. Step 3. Calculate the sample variance and the sample standard deviation. Provide your sample standard deviation answer precise to one decimal place.
90) The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 years. A random sample of 45 cars had an average age of 10.6 years. It is believed that the population standard deviation for the age of cars is 4.1 years. The Department of Transportation would like to set a = 0.05.
3. The mean age of sample of 100 cars from a certain manufacturer is found to be eleven years. If the sample standard deviation of car ages is 5 years, give a 99% confidence interval for the mean age of cars from this manufacturer. 4. The sample standard deviation of the ages of a random sample of 40 television sets in a neighborhood is 3 years. Find a 95% confidence interval for the standard deviation of the entire population of...
The following data set represents some scores in 10 replications. Based on this daK seft answer questions Q.1 and 2: 26 56 60 21 11 27 44 23 22 60 Q.1. The data above indicate the number of cars that have been sold by a car dealer in the last 10 weeks. Draw histogram for this data and fill out following table for the same data. Relative Class Frequency 10sx30Frequency 30 sx<50 50 sx<70 Q2.2. Calculate mean and standard deviation...
What are the sample variance and sample standard deviation of the following data set: 4, 7, 9, 10, 16? Sample standard deviation=4.4 Variance=19.7 Sample standard deviation=6 Variance= 36 Sample standard deviation=7 Variance= 49 Sample standard deviation=3 Variance= 9
2. Samples of the age in years of student cars and faculty/staff cars: Student: 10,4, 5,2, 9, 7, 8, 8,7, 13, 12, n-11 Faculty: 5, 10, 4, 13, 2,3, 2, 7, 6, 6, 3, 4, n 12 Calculate the mean, median, and mode for each group. Do either of these distributions appear to be skewed? 3. The data below reflect movie viewers' recall of products/brands shown within either humorous or dramatic movies. Calculate the range, variance, and standard deviation of...
Question 12 2.5 pts The average age of cars owned by residents of Oshkosh is 4 years with a standard deviation of 2.2 years. A simple random sample of 400 cars is selected, and the sample mean age is computed. What is the probability that the average age of the 400 cars is less than 3.8 years? 0.0344 0.5359 0.9656 0.4641
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