A metallurgical company controls that the standard deviation of the length of the parts it produces...
A metallurgical company controls that the standard deviation of
the length of the parts it produces which do not exceed 10 cm.
However, the standard deviation of a 40-piece sample was 10.5 cm.
According to these figures and assuming a significance level of
0.05, do we have enough evidence to say that the company is not
correctly controlling the standard deviation of its
parts?
type: 1 population
n = 40
σ^ = 10.5
null hypothesis H_0: σ = 10
alternative hypothesis H_1: σ > 10
What is the p value?
Homework Answers
Add Answer to:
A metallurgical company controls that the standard deviation of
the length of the parts it produces...
A film company wants to know if its new film will be well received by the...
A film company wants to know if its new film will be well received by the public. To find out, they released the film to a sample of 100 viewers first. After viewing the film, they passed out a satisfaction questionnaire that has a minimum score of 0 points and a maximum of 100. Based on previous experiences, the company has done a study that predicts that the satisfaction score will be at least 80 points. However, the average score...
Using the following data, conduct a hypothesis test (by hand) to see if your sample standard deviation (s) differs significantly from your population standard deviation (σ = 2). Alpha is 0.05 (α = 0.0...
Using the following data, conduct a hypothesis test (by hand) to see if your sample standard deviation (s) differs significantly from your population standard deviation (σ = 2). Alpha is 0.05 (α = 0.05). Sample data: 10, 12,10, 9, 11, 10, 11, 9, 11, 10, 9, 10, 11, 10, 8, 9, 11, 10 You will need to: a) State your alternative hypothesis and null hypothesis b) Calculate the sample standard deviation (s) c) Calculate the sample size and degrees of...
10. A manufacturing firm produces a part for which the standard deviation in the diameter must...
10. A manufacturing firm produces a part for which the standard deviation in the diameter must not exceed 0.052 cm. to comply with the manufacturing specifications. To test that the part is in compliance, the firm randomly samples 25 parts and measures the diameter of each piece. The sampled results are to be used to test whether the part complies with the specifications. Which of the following is the correct null and alternative hypotheses for this test? a. Ho: 02...
An insurance agent says the standard deviation of the total hospital charges for patients involved in...
An insurance agent says the standard deviation of the total hospital charges for patients involved in a crash in which the vehicle struck a construction barricade is less than $3900. A random sample of 28 total hospital charges for patients involved in this type of crash has a standard deviation of $4700. At α=0.10 can you support the agent's claim? Use the P-value method to test the claim.Identify the null and alternative hypotheses. Let σ be the population standard deviation....
15. Manufactured Machine Parts A manufacturing process produces machine parts with measurements the standard deviation of...
15. Manufactured Machine Parts A manufacturing process produces machine parts with measurements the standard deviation of which must be no more than 0.52 mm. A random sample of 20 parts in a given lot revealed a standard deviation in measurement of 0.568 mm. Is there sufficient evidence at a = 0.05 to conclude that the standard deviation of the parts is out- side the required guidelines?
A random sample of 100 observations from a population with standard deviation 63 yielded a sample...
A random sample of 100 observations from a population with standard deviation 63 yielded a sample mean of 111. Complete parts a through c. a. Test the null hypothesis that y 100 against the alternative hypothesis that > 100, using a 0.05. Interpret the results of the test. Ho is rejected Ho is not rejected O Interpret the results of the test. Choose the correct interpretation below. O A. There is sufficient evidence to indicate the true population mean is...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample mean of 114. Complete parts a through c below. a. Test the null hypothesis that u = 100 against the alternative hypothesis that u > 100, using a = 0.05. Interpret the results of the test. What is the value of the test statistic? und to two decimal places as needed.) Find the p-value. p-value = (Round to three decimal places as needed.) State...
A large software company gives job applicants a test of programming ability and the mean for...
A large software company gives job applicants a test of programming ability and the mean for that test has been 160 in the past. Twenty-five job applicants are randomly selected from a large university and they produce a mean score of 183 and standard deviation of 12. Use a 0.05 significance level to test whether the mean score for students from this university is greater than 160. H0: H1: Which is the claim, null, or alternative hypothesis? Critical t value:...
The manufacturer of processed deli meats reports that the standard deviation of the number of carbohydrates...
The manufacturer of processed deli meats reports that the standard deviation of the number of carbohydrates in its smoked ham is 0.6 gram per 2-ounce serving. A dietician believes it is higher than this, so she randomly selects 48 of the 2-ounce servings of smoked ham and determines that the standard deviation of the number of carbohydrates is 0.72 gram per serving. Is there sufficient evidence to indicate that the standard deviation is higher than 0.6 gram per serving at...
The standard deviation for a certain professor's commute time is believed to be 45 seconds. The...
The standard deviation for a certain professor's commute time is believed to be 45 seconds. The professor takes a random sample of 25 days. These days have an average commute time of 13.4 minutes and a standard deviation of 53 seconds. Assume the commute times are normally distributed. At the .1 significance level, conduct a full and appropriate hypothesis test for the professor. What are the appropriate null and alternative hypotheses? HH0:?2=45 H1:?2?45 Identify the other values given in the...
10. A manufacturing firm produces a part for which the standard deviation in the diameter must not exceed 0.052 cm. to comply with the manufacturing specifications. To test that the part is in compliance, the firm randomly samples 25 parts and measures the diameter of each piece. The sampled results are to be used to test whether the part complies with the specifications. Which of the following is the correct null and alternative hypotheses for this test? a. Ho: 02...
15. Manufactured Machine Parts A manufacturing process produces machine parts with measurements the standard deviation of which must be no more than 0.52 mm. A random sample of 20 parts in a given lot revealed a standard deviation in measurement of 0.568 mm. Is there sufficient evidence at a = 0.05 to conclude that the standard deviation of the parts is out- side the required guidelines?
A random sample of 100 observations from a population with standard deviation 63 yielded a sample mean of 111. Complete parts a through c. a. Test the null hypothesis that y 100 against the alternative hypothesis that > 100, using a 0.05. Interpret the results of the test. Ho is rejected Ho is not rejected O Interpret the results of the test. Choose the correct interpretation below. O A. There is sufficient evidence to indicate the true population mean is...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample mean of 114. Complete parts a through c below. a. Test the null hypothesis that u = 100 against the alternative hypothesis that u > 100, using a = 0.05. Interpret the results of the test. What is the value of the test statistic? und to two decimal places as needed.) Find the p-value. p-value = (Round to three decimal places as needed.) State...
The manufacturer of processed deli meats reports that the standard deviation of the number of carbohydrates in its smoked ham is 0.6 gram per 2-ounce serving. A dietician believes it is higher than this, so she randomly selects 48 of the 2-ounce servings of smoked ham and determines that the standard deviation of the number of carbohydrates is 0.72 gram per serving. Is there sufficient evidence to indicate that the standard deviation is higher than 0.6 gram per serving at...
Most questions answered within 3 hours.
-
Given input { 66, 28, 43, 29, 44, 69, 19 } and a hash function
h(x)...
asked 17 minutes ago -
A pebble with mass m is thrown straight up with an initial speed
v0 so that...
asked 21 minutes ago -
Let X be a discrete random variable that follows a
binomial distribution with n = 11...
asked 30 minutes ago -
The equilibrium constant, K, for the following reaction is
1.29×10-2 at 600
K.
COCl2(g) --->
CO(g)...
asked 43 minutes ago -
It is known that 72% of people have a favorable opinion of their
local police force....
asked 46 minutes ago -
A vertical straight wire carrying an upward 26-A current exerts
an attractive force per unit length...
asked 59 minutes ago -
For the purposes of this assignment, you are to choose an
adaptive trait common to more...
asked 1 hour ago -
Two identical flutes can play middle C (262 Hz) at 20◦C. How
many beats per second...
asked 1 hour ago -
Potassium phosphate and calcium chloride react in a double
replacement reaction. To produce 1.0 moles of...
asked 1 hour ago -
Sparky, Co. purchased land as a factory site for $600,000.
Sparky paid $42,000 to tear down...
asked 1 hour ago -
A Chi-square distribution with 14 degrees of freedom is a
correct model for
Question 8 options:...
asked 1 hour ago -
In a group of 45 mice, there are 10 that have a certain genetic
character. suppose...
asked 1 hour ago