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kolbaska11 [484]
3 years ago
13

Suppose that we've decided to test Clara, who works at the Psychic Center, to see if she really has psychic abilities. While tal

king to her on the phone, we'll thoroughly shuffle a standard deck of cards (which is made up of hearts, spades, diamonds, and clubs) and draw one card at random. We'll ask Clara to name the suit (heart, spade, diamond, or club) of the card we drew. After getting her guess, we'll return the card to the deck, thoroughly shuffle the deck, draw another card, and get her guess for the suit of this second card. We'll repeat this process until we've drawn a total of cards and gotten her suit guesses for each. Assume that Clara is not clairvoyant, that is, assume that she randomly guesses on each card. a.Estimate the number of cards in the sample for which Clara correctly guesses the suit by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable). b.Quantify the uncertainty of your estimate by giving the standard deviation of the distribution.
Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

Step-by-step explanation:

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Answer:

C) 0.19

Step-by-step explanation:

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We can see that this line of best fit is increasing, so our correlation coefficient will be positive.

However we can also see that the points are fairly scattered; this means this is not a very good fit.  This means that 0.19 is the better fit.

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MrRissso [65]

Answer:

53/100

Step-by-step explanation:

First, we convert the fraction to a decimal number by dividing the numerator by the denominator:

8 / 15 = 0.533

There are two parts to the decimal number above:

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Now, we will make the Fractional Part just two digits (nearest hundredth) by using our rounding rules.*

In this case, Rule I applies, so 8/15 (or 0.533) rounded to the nearest hundredth in decimal format is:

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That's it. 8/15 rounded to the nearest hundredth is displayed below (simplified if necessary):

53/100

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Answer:

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Step-by-step explanation:

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