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3 years ago

A coin is tossed 100 times. Consider the following statements:

Mathematics

1 answer:

shusha [124]3 years ago

4 0

Answer:

1. and III.

Step-by-step explanation:

Option 1 and 3 are correct.

The probability of landing on heads would be 1/2, so 50 times in 100. This is the expected outcome, so option 1 is correct.

However, that is just the most probable outcome, probability is almost never 100% accurate. Therefore, the number of heads will most likely be 50, give or take 5 or so. Therefore, option 3 is also correct.

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In a sample of 138 tables, the average height was found to be 32.6in. with a variance of 2.8. Give a point estimate for the popu

vesna_86 [32]

Answer:

$\hat{\sigma}^2 = 2.8$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 138

Average = 32.6 inch

Population variance,

$\sigma^2 = 2.8$

We have to find a point estimate for the population variance of the height.

The point estimate for the population variance is the population variance itself.

$\hat{\sigma}^2 = \sigma^2 = 2.8$

Thus, the point estimate of population variance is the population variance that is 2.8.

5 0

3 years ago

Clive has a phone plan where he pays double his base per minute rate for any additional minute spent on a call over twenty minut

Sidana [21]

The two variables that we should use are:

x = number of minutes that the call lasted.
y = cost of that call.

<h3>What variables should we use?</h3>

Here we want to study a relation between the cost per call as the function of the minutes that the call lasted.

So, we need to use two variables, x will be the number of minutes that call lasted, this is the independent variable.

And the variable that depends on that should be the cost of the call, let's say, y is the cost of the call.

These are the two variables that we need to model the situation:

y = f(x)

There says:

<em>"The cost of the call is a </em><em>function </em><em>of the number of minutes that the call lasted".</em>

<em />

If you want to learn more about functions, you can read:

<em>brainly.com/question/4025726</em>

6 0

2 years ago

1. Find the sum of csc230° and cot2 45°.

wlad13 [49]

Answer:

Step-by-step explanation:

Based on the given conditions, formulate

Evaluate the expression:

Calculate the power:

Calculate the first two terms:

Answer:

6 0

3 years ago

If you bike for 60 kilometers at 30 kilometers per hour and return at 20 kilometers per hour, what is the average speed for the

matrenka [14]

V1=30km/hr
v2=20km/hr
v=2v1v2/(v1+v2)
=2*30*20/(30+20)
=24km/hr

8 0

3 years ago

Pls help pls help pls help

sasho [114]

Answer:

Step-by-step explanation:

do dancers off C5

5 0

2 years ago