Answer:
a) 1/2
about 50%
Step-by-step explanation:
3(2+5z)
3 x 2 = 6 and 3 x 5z = 15z
6+15z
If Leslie is about to type 56 words per minute, she would be able to type 8 pages in one hour
How many words can Leslie type in one hour?
The fact that Leslie can type 56 words per minute means that he is able, means that the number of words she is able to type in one hour is determined as 56 words multiplied 60 minutes which make an hour
number of words in one hour=56*60
number of words in one hour=3360
The number of pages typed is determined as the 3360 words typed in one hour divided by the number of words in a page
number of pages type=3360/420
number of pages typed=8 pages
Find out more about time and task on:brainly.com/question/25991045?
#SPJ1
Since we are dealing with a proportion, it is determined by using the z-distribution that there is insufficient evidence to draw the conclusion that the proportion of all kochia plants that are resistant to glyphosate has increased because the test statistic is less than the critical value for the right-tailed test.
In this problem, we consider that:
- is the proportion in 2014.
- is the proportion is 2017.
<h3>What are the hypothesis tested?</h3>
- At the null hypothesis, we test if there has been no increase, that is, the subtraction is of 0.
- At the alternative hypothesis, we test if there has been an increase, hence:
<h3>What is the distribution of the difference of sample proportions?</h3>
The proportions and standard errors are given by:
Hence, the distribution has mean and standard error given by:
<h3>What is the test statistic?</h3>
It is given by:
In which p = 0 is the value tested at the null hypothesis, hence:
<h3>What is the decision?</h3>
- Considering a right-tailed test, as we are testing if the proportion is greater than a value, with a significance level of 0.05, the critical value is of
- There is insufficient information to establish that the fraction of all kochia plants that are resistant to glyphosate has increased because the test statistic is smaller than the crucial value for the right-tailed test.
Learn More about the z-distribution here: brainly.com/question/26454209
#SPJ4
5-(-8)= 5+8= 13 because when the problem is subtraction you change the last number to a positive or negative