Jill can answer 50 math questions every 20 minutes how many questions can she complete per minute?
2 answers:
Answer: 2 .5 questions
Step-by-step explanation:
Given : Jill can answer 50 math questions every 20 minutes
To find the number of questions Jill can answer in one minute , we need to divide 50 by 20 , we get
The number of questions she complete in one minute =
i.e. The number of questions she complete in one minute =
So she complete 2 and a half questions per minute.
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Answer:
a) Sample correlation coefficient, r = 0.7411
bi) test statistic, t = 4.102
bii) P-value = 0.000736
Step-by-step explanation:
a) The formula for the sample correlation coefficient is given by the formula:
r = 0.7511
b)
i) formula for the test statistic is given by the formula:
sample size, n = 4
t = 4.102
ii) Degree of freedom, df = n -2
df = 14 -2
df = 12
The P-value is calculate from the degree of freedom and the test statistic using excel
P-value =(=TDIST(t,df,tail))
P-value = (=TDIST(4.1,12,1)
P-value = 0.000736
Answer:
[B]
Step-by-step explanation:
<em>Given:</em>
<em>People leaving the library were asked how many books they checked out that day The result are: 1,2, 3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20</em>
<em>To Find:</em>
<em>Which histogram correctly shows the data set?</em>
<em>Solution:
Since it given from the histogram:</em>
<em>0-5, 6-11, 12 - 17,18-23</em>
<em>From the result :</em>
<em>1,2, 3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20</em>
<em>Thus,</em>
<em>1,2,3,5 = 0-5</em>
<em>8,9,10,11 = 6-11</em>
<em>12,13,14,15,16 = 12-17</em>
<em>18,20 = 18-23</em>
<em>From this we can see that:</em>
<em>for </em>
<em>0 - 5 = 4</em>
<em>6 - 11 = 4</em>
<em>12 - 17 = 5</em>
<em>18 - 23 = 2</em>
<em>Hence, the answer is [B]</em>
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<u><em>Kavinsky</em></u>
