Choose the equation that represents the line that passes through the point (2, 6) and has a slope of −5.
2 answers:
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Answer:
We should expect 25 generated digits in order to get a fifth "4"
Step-by-step explanation:
For each generated digit, there are only two possible outcomes. Either it is a four, or it is not. The probability of a digit being a 4 is independent of other digits. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
The expetcted number of trials to get r sucesses, with p probability, is given by:
Assume that the calculator will generate a "4" on any given attempt with probability 0.20.
This means that
How many total generated digits should we expect in order to get a fifth "4"
This is E when r = 5. So
We should expect 25 generated digits in order to get a fifth "4"
Answer:
The critical values of r are -0.708 and 0.708.
Step-by-step explanation:
A statistical test is being performed to determine whether there is any linear correlation between two variables.
The hypothesis can be defined as follows:
<em>H</em>₀: There is no linear correlation between two variables, i.e. <em>ρ</em> = 0.
<em>H</em>ₐ: There is a significant linear correlation between two variables, i.e. <em>ρ</em> ≠ 0.
The test statistic is given as follows:
The degrees of freedom of the test is:
The significance level of the test is, <em>α</em> = 0.01.
The critical values of <em>r</em> are:
*Use the <em>r</em> critical value table.
Thus, the critical values of r are -0.708 and 0.708.
