Answer: 93
Step-by-step explanation: Apex said so
The minimum sample size required to estimate a population proportion or percentage is 306.
In statistics, a simple random sample is a subset of individuals chosen from a larger set in which a subset of individuals are chosen randomly, all with the same probability. It is a process of selecting a sample in a random way.
In order to determine the minimum sample size required to estimate a population proportion or percentage, we will use the following formula:
n = (z×p×q)/m²
where is the minimum sample size, z is the z-score corresponding to the desired confidence level, p is the population proportion, q is 1-p, and m is the desired margin of error.
In this case, the confidence level is 95%, so the corresponding z-score is 1.96. Since we don't know the population proportion, we will use the symbol p and q to represent it. Therefore, the formula becomes:
n = (1.96×p×q)/(0.04)²
To determine the minimum sample size, we need to determine the value of p and q. Since p + q = 1, if we set p to 0.5, then q will also be 0.5. Therefore, the minimum sample size is:
n = (1.96×0.5×0.5)/(0.04)² = 306.25
≈ 306
Therefore, the minimum sample size required to estimate a population proportion or percentage is 306.
Learn more about the random sample here:
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b. Express the temperature of the roast 30 minutes after being put in the oven in functional notation, and then calculate its value.
c. By how much did the temperature of the roast increase during the first 10 minutes of cooking?
d. By how much did the temperature of the roast increase from the first hour to 10 minutes after the first hour of cooking?
Answer:
Step-by-step explanation:
a. We are not given enough information to determine the temperature of the refrigerator.
b. We can express the temperature of the roast 30 minutes after being put in the oven as R(30). Its value depends on the specific function R(t) given in the problem.
c. To find the increase in temperature during the first 10 minutes of cooking, we need to find the difference between the temperature of the roast after 10 minutes and the temperature of the roast when it was put in the oven. This is given by:
R(10) - R(0)
d. To find the increase in temperature from the first hour to 10 minutes after the first hour of cooking, we need to find the difference between the temperature of the roast at 1 hour and 10 minutes and the temperature of the roast at 1 hour. This is given by:
R(70) - R(60)
The temperature of the refrigerator is the initial temperature of the roast. The temperature of the roast 30 minutes after being put in the oven can be expressed as R(30), but its value cannot be determined without a specific function. The temperature increase during specific time intervals can be calculated by finding the difference between the temperatures at the respective times.
a. To find the temperature of the refrigerator, we need to use the given information. Since the roast was in the refrigerator for several days before being placed in the oven, we can assume that the temperature of the refrigerator matches the temperature of the roast initially, which is denoted as R(0). Therefore, the temperature of the refrigerator is R(0).
b. Expressing the temperature of the roast 30 minutes after being put in the oven in functional notation is R(30). To calculate its value, we need the specific function or equation that relates the temperature to time. Without this information, we cannot determine the exact numerical value of R(30).
c. To determine the temperature increase during the first 10 minutes of cooking, we need the temperature difference between the initial temperature of the roast (R(0)) and the temperature after 10 minutes of cooking (R(10)). The increase is given by R(10) - R(0).
d. To find the temperature increase from the first hour to 10 minutes after the first hour of cooking, we need the temperature at the start of the first hour (R(60)) and the temperature at 10 minutes after the first hour (R(60 + 10)). The increase is given by R(60 + 10) - R(60).
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Answer: The graph is attached.
Step-by-step explanation: We are given to draw the graph of the following equation:
where 'V' is the total volume of water in a bucket and 't' is the elapsed time in minutes.
Since equation (i) is a linear equation in two unknown variables, so the graph will be a straight line.
To draw the graph of a straight line, we need at least two points to be plotted on the graph paper and then joined straight.
If t = 0, then from equation (i), we have
If t = -2, then from equation (i), we have
So, (t. V) = (0, 4) and (-2, 0) are two points on the graph, if 't' is plotted along X-axis and 'V' is plotted along Y-axis.
These two points are joined to draw the graph of the given equation. Please see the attached graph below.
+ 999
can you strike out 6 of these digits so that the total of the remaing numbers shall be 20?
The total of the remaining numbers shall be 20 by taking out 6 digit as
11 + 9 = 20.
One of the four fundamental operations of mathematics is addition, which is typically denoted by the plus sign (+). The other three are subtraction, multiplication, and division. The entire amount or sum of the two whole numbers is obtained by adding them.
Make 111, 777, and 999 smaller because they are all more than 20.
Now, Five digits, minus one 1, two 7, and two 9, equals twenty 11 + 7 + 9 ≠ 20 (it equals 27).
Now, Remove number 7 now.
If you take out number 1 then
1+7+9=17, not 20
and of if we take out number 9 then
= 11+7=18, not 20
So, 11 + 9 = 20 (we took out numbers: 1, 7, 7, 7, 9 and 9 [6 numbers]).
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Since 111, 777, and 999 are all bigger than 20, make them smaller. Take out one 1, two 7, and two 9 (5 numbers): 11 + 7 + 9 ≠ 20 (it equals 27). Now take out number 7. (If you take out number 1 [1+7+9=17, not 20] and of you take out number 9 [11+7=18, not 20].
11 + 9 = 20 (you took out numbers: 1, 7, 7, 7, 9 and 9 [6 numbers]).