Ricky has $850 to deposit into two different savings accounts.
2 answers:
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Answer:
Confidence interval is
Step-by-step explanation:
Given that 32% of fans sport is basketball as favorite sport. So total number of fans is,
So 320 fans favorite sport is basket ball.
Now find sample proportion ,
Substituting the value,
Formula for confidence interval is,
To calculate the z value.
Now divide above value by 2,
To find the value of z score calculate the area under the curve as follows
On z table, find the value of 0.975. So the row corresponding to 0.975 is 1.9 and column corresponding to 0.975 is 0.06. Adding these two values the z score is 1.96.
or find the value from excel by using command as follows,
=NORM.S.INV(0.025)= -1.959963985
Now substituting the value,
Lower end of the interval is,
Upper end of the interval is,
Therefore 95% confidence interval is
Answer:
<h2>C . 7 units</h2>Step-by-step explanation:
The question is lacking appropriate diagram. Find the diagram to the question attached.
From the diagram, it can be seen that AD = AB+BC+CD
Given the following
AD = 23units
AB = 4units
CD = 12units
To get C=BC, we will substitute the given segments into the expression above as shown;
23 = 4+BC+12
23 = BC + 4 + 12
23 = BC+16
Subtract 16 from both sides
23-16 = BC+16-16
7 = BC
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<em>Hence the length of segment BC is 7units.</em>
