Homework Answers
a)
H0: mu = 8.5
b)
Type I error occurs when one incorrectly rejects the null
hypothesis
Here type I error will occurs if a conclusion is made to that mean height is greater than 8.5 inches however actually it is 8.5 inches.
c)
Type II error occurs when one incorrectly fails to reject the null
hypothesis
Here type II error will occur if a conclusion is made that the mean height is 8.5 inches however actually it is greater than 8.5 inches.
d)
When type I error occurs, farmers who will use the fertilizer will
suffer most.
Add Answer to:
13) A certain type of seed has always grown to a mean height of 8.5 inches....
A horticultural researcher is investigating the mean height of a certain type of plant. in making...
A horticultural researcher is investigating the mean height of a certain type of plant. in making inferences about the mean height of this plant, the error of estimation, d can be no larger then 3cm. given thatit is known that sigma=16 cm, how large of a sample is necessary for the error of estimation to be no larger than 3cm if the horticulturalist requires a 92% CONFIDENCE OF MEW
The mean height of 36 randomly selected New York City students is 68.2 inches, with a...
The mean height of 36 randomly selected New York City students is 68.2 inches, with a standard deviation of 4.18 inches. Finish the hypothesis test of the claim that the mean height of all New York City students is greater than 67 inches. Use a significance level of a= 0.05 We ________ have sufficient evidence to __________ the claim.
The mean height of 36 randomly selected NYC College students is 68.2 inches, with a standard...
The mean height of 36 randomly selected NYC College students is 68.2 inches, with a standard deviation of 4.18 inches. Begin a hypothesis test of the claim that the mean height of all Moorpark College students is greater than 67 inches. Use a significance level of null and alternative hypotheses and select an appropriate test statistic. H0: H1: Test Statistic:
in the past, the mean running time for a certain type of flashlight battery has been...
in the past, the mean running time for a certain type of flashlight battery has been 8.1 hours The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has changed as a result. a. Two Tailed b. Left Tailed c. Right tailed Question 2 In the past, the mean running time for a certain type of flashlight battery has been 9.0 hours. The manufacturer has introduced...
5.) Suppose a researcher collected data on the mean height of tomato plants grown in organic...
5.) Suppose a researcher collected data on the mean height of tomato plants grown in organic soil, and in computing the confidence interval for the population mean, and the margin of error was computed to be 4.86 inches. Use that to answer the following questions: a. What is the length of the confidence interval (i.e. from the first number to the second how long is the interval) if the margin of error is 4.86 inches? (2pts) b. If the data...
In the past, the mean lifetime for a certain type of flashlight battery has been 9.5...
In the past, the mean lifetime for a certain type of flashlight battery has been 9.5 hours.9.5 hours.The manufacturer has introduced a change in the production method and wants to perform a significance test to determine whether the mean lifetime has increased as a result. The hypotheses are H0:μ=9.5 hours and Ha:μ>9.5 hours. Suppose that the results of the sample lead to rejection of the null hypothesis. Classify that conclusion as a Type I error, a Type II error, or...
A researcher wants to determine the impact of soil type on the growth of a certain type of plant....
A researcher wants to determine the impact of soil type on the growth of a certain type of plant. She grows three plants in each of four different types of soil and measures the growth in inches for each plant after one month resulting in the data below. A1 Use this file: Assignment 9q2 data FOR R ) What null hypothesis is the researcher testing if she runs an ANOVA with this data ( The variability in growth of the...
Suppose the mean height of women age 20 years or older in a certain country is...
Suppose the mean height of women age 20 years or older in a certain country is 62.6 inches. One hundred randomly selected women in a certain city had a mean height of 61.5 inches. At the 11% significance level, do the data provide sufficient evidence to conclude that the mean height of women in the city differs from the national mean? Assume that the population standard deviation of the heights of women in the city is 3.63.6 inches. Set up...
A new treatment has been developed for a certain type of cement, resulting in a mean...
A new treatment has been developed for a certain type of cement, resulting in a mean pressure resistance of 5000kg/cm² and a standard deviation of 130kg/cm². To verify the null hypothesis of p = 5000 against the alternative of u <5000, a random sample of 50 pieces of cement are examined. Determine the probability of committing a Type II error if = 4960 and a = 0.05. A. 0.298 B. 0.954 C. 0.082 D. 0.105 E. none of the preceding
11) In the past, the mean battery life for a certain type of flashlight battery has...
11) In the past, the mean battery life for a certain type of flashlight battery has been 8.8 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean battery life has increased as a result. The hypotheses are: Ho: = 8.8 hours H4> 8.8 hours a) Explain the result of a Type I error. b) Explain the result of a Type II error.
A researcher wants to determine the impact of soil type on the growth of a certain type of plant. She grows three plants in each of four different types of soil and measures the growth in inches for each plant after one month resulting in the data below. A1 Use this file: Assignment 9q2 data FOR R ) What null hypothesis is the researcher testing if she runs an ANOVA with this data ( The variability in growth of the...
A new treatment has been developed for a certain type of cement, resulting in a mean pressure resistance of 5000kg/cm² and a standard deviation of 130kg/cm². To verify the null hypothesis of p = 5000 against the alternative of u <5000, a random sample of 50 pieces of cement are examined. Determine the probability of committing a Type II error if = 4960 and a = 0.05. A. 0.298 B. 0.954 C. 0.082 D. 0.105 E. none of the preceding
11) In the past, the mean battery life for a certain type of flashlight battery has been 8.8 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean battery life has increased as a result. The hypotheses are: Ho: = 8.8 hours H4> 8.8 hours a) Explain the result of a Type I error. b) Explain the result of a Type II error.
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago