9 stores is 3% of _____ stores.
2 answers:
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Answer:
(a) The proportion of tenth graders reading at or below the eighth grade level is 0.1673.
(b) The 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.198, 0.260).
Step-by-step explanation:
Let <em>X</em> = number of students who read above the eighth grade level.
(a)
A sample of <em>n</em> = 269 students are selected. Of these 269 students, <em>X</em> = 224 students who can read above the eighth grade level.
Compute the proportion of students who can read above the eighth grade level as follows:
The proportion of students who can read above the eighth grade level is 0.8327.
Compute the proportion of tenth graders reading at or below the eighth grade level as follows:
Thus, the proportion of tenth graders reading at or below the eighth grade level is 0.1673.
(b)
the information provided is:
<em>n</em> = 709
<em>X</em> = 546
Compute the sample proportion of tenth graders reading at or below the eighth grade level as follows:
The critical value of <em>z</em> for 95% confidence interval is:
Compute the 95% confidence interval for the population proportion as follows:
Thus, the 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.198, 0.260).
The answer is C cause from
10
10
Answer: <em>third from the top</em>
Step-by-step explanation:
<em>The correct answer is third from the top.</em>
<em>Arranging numbers in ascending order: </em>
<em>15 17 17 17 18 18 18 19 19 19 21 21 22 23 24</em>
<em>Let's count how many times each number occurs in this series of numbers.</em>
<em>row of numbers</em>
<em>15 </em>+
<em>16 not</em>
<em>17 </em>+ + +
<em>18 </em>+ + +
<em>19 </em>+ + +
<em>20 not</em>
<em>21 </em>+ +
<em>22 </em>+
<em>23 </em>+
<em>24 </em>+
<em>25 not</em>
