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mel-nik [20]
3 years ago
11

Jamal performed an experiment flipping a coin. He did 10 trials and then his arm got tired. He recorded his results in the table

. Based on the experimental probability, Jamal predicted that the number of times the coin lands heads up will always be greater than the number of times it lands tails up. What is the error in his prediction?
Mathematics
2 answers:
AleksAgata [21]3 years ago
8 0

Answer:

The error in his prediction is that he had too small of a sample size for the data to be reliable in how the trend would continue.

aivan3 [116]3 years ago
7 0

Answer:

He did not perform enough trials to compare the theoretical and experimental probabilities.

Step-by-step explanation:

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Are the fractions 1/5 , 5/5 , and 5/1 equivalent?Explain.
NeX [460]
<span><u><em>Answer:</em></u>
They are not equal

<u><em>Explanation:</em></u>
<u><em>Let's take a look at each one of them separately:</em></u>
</span>\frac{1}{5}<span> : This fraction is in the simplest form. It is equivalent to 0.2
The fraction is formed by dividing one part over five

</span>\frac{5}{5}<span> : This fraction is not in the simplest form. We can divide 5 by 5 and the answer would be 1. Therefore, </span>\frac{5}{5}<span> is equivalent to 1

</span>\frac{5}{1}<span> : This fraction is not in the simplest form. We can divide 5 by 1 and the answer would be 5. Therefore, </span>\frac{5}{1}<span> is equivalent to 5.

Based on the above, we can cnfirm that 0.2 , 1 and 5 are not equivalent.
Therefore, the given fractions are not equivalent

Hope this helps :)</span>
5 0
3 years ago
Let X1, X2, and X3 represent the times necessary to perform three successive repair tasks at a service facility. Suppose they ar
belka [17]

Answer:

The mean of the total repair time is 150 minutes.

The variance of the total repair time is 725 minutes^2.

Step-by-step explanation:

To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.

In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

y=x_1+x_2+x_3 \\\\E(y)=E(x_1+x_2+x_3)=E(x_1)+E(x_2)+E(x_3)\\\\E(y)=50+60+40=150

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):

V(y)=V(x_1)+V(x_2)+V(x_3)\\\\V(y)=s_1^2+s_2^2+s_3^2\\\\V(y)=15^2+20^2+10^2\\\\V(y)=225+400+100\\\\V(y)=725

8 0
3 years ago
The population of India was about 1,380,000,000 people in 2020. Which
marishachu [46]
The first one should be the answer
4 0
2 years ago
Which function grows at the fastest rate for increasing values of x?
butalik [34]
Last one is A, (3,4) and (5,12) because that's where the lines meet therefore it is a solution and this graph consists of two solutions.
5 0
3 years ago
20 POINTS <br> Hey! I need help with the question below.
valkas [14]

First lets write the equation for both DVD Phones and Moblie Phones

Moblie Phones= 2x+5.2

DVD Phones= 2x+2

The answer is never because the lines are parallel to each other because they have the same slope.

6 0
3 years ago
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