![steviedude316](/avatars/19724.jpg)
steviedude316
13.12.2019 •
Mathematics
Aresearcher expects a treatment to produce an increase in the population mean. the treatment is evaluated using a one tailed hypothesis test, and the test produces z = +1.85. based on this result, what is the correct statistical decision?
a) the researcher should reject the null hypothesis with a = .05 but not with a = .01.
b) the researcher should reject the null hypothesis with either a = .05 or a = .01.
c) the researcher should fail to reject h0 with either a = .05 or a = .01.
d) this cannot be answered without additional information.
Solved
Show answers
More tips
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- L Leisure and Entertainment Carving: History and Techniques for Creating Vegetable and Fruit Decorations...
- P Photography and Videography How to Choose the Perfect Photo Paper for Your Images?...
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine Reasons for the Appearance of Warts: Everything You Need to Know...
- A Art and Culture How to Learn Screaming: Step-by-Step Guide for Beginners...
- H Health and Medicine Contraceptive Pills After 35: The Importance Of Choosing The Right Medication...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Mathematics
- M Mathematics Of the sixth grade, 1/4 are blond. Of the sixth-grade students who are blind. 1/10 are left handed. If there are 160 students in the sixth grade, how many are both blond and left handed...
- M Mathematics Look into the fact that if you sum up integers, the running tally will grow quadratically. now, armed with this knowledge, consider the following question. each unit of brand awareness...
- H History Discussion Topic In this unit, we’ll be considering what it means for a leader to “govern fairly.” • What actions might a leader take to govern fairly? • What actions would show a...
- E English Who wanna be friends? ✨️...
Ответ:
A) The researcher should reject the null hypothesis with a = .05 but not with a = .01.
Step-by-step explanation:
State the null and alternative hypotheses to be tested
On this case we can assume that the researcher conduct a one right tailed test hypothesis like on this way:
Null hypothesis:
Alternative hypothesis:![\mu \mu_o](/tpl/images/0416/7202/a95db.png)
The statistic for this case is given by:
z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".
On this case we have the value for z score given z =+1.85
It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.
The significance level provided
. The next step would be calculate the p value for this test.
Since is a one right tail test the p value would be:
If we compare the p value obtained and the significance level given
we can take a decision:
A) The researcher should reject the null hypothesis with a = .05 but not with a = .01.
YES, since the p value it's higher than the significance level of 0.01 so we FAIL to reject the null hypothesis at this significance level. And for the significance level 0.05 we have that
and we can reject the null hypothesis.
B) The researcher should reject the null hypothesis with either a = .05 or a = .01.
No since the p value it's higher than the significance level of 0.01 so we FAIL to reject the null hypothesis at this significance level
C) The researcher should fail to reject H0 with either a = .05 or a = .01.
No, for the significance level of 0.05 we reject the null hypothesis since![p_v](/tpl/images/0416/7202/bffea.png)
D) This cannot be answered without additional information.
No, we have enough info to answer the question
Ответ: