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Sliva [168]
3 years ago
12

Jessica doesn't have any idea of what the answer is on one of her multiple choice questions like this problem. The problem has 4

possible choices. After she guesses the answer, she realized that she has a 25% chance of getting that question correct. What type of probability did she use?
Mathematics
1 answer:
leva [86]3 years ago
8 0
Random probability, if that’s an answer.
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Bethany purchased gasoline at four different gas stations. The table shows the total cost of the gasoline she
sineoko [7]

Answer: station X

Step-by-step explanation:

Because it was 3.08 the rest were lower

5 0
3 years ago
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A selective university advertises that 96% of its bachelor’s degree graduates have, on graduation day, a professional job offer
OLEGan [10]

Answer:

The probability is  P( p <  0.9207) = 0.0012556

Step-by-step explanation:

From the question we are told

  The population proportion is p = 0.96

 The sample size is  n  =  227

 The number of graduate who had job is  k = 209

Generally given that the sample size is large enough  (i.e n >  30) then the mean of this sampling distribution is  

       \mu_x = p = 0.96

Generally the standard deviation of this sampling distribution is  

    \sigma  = \sqrt{\frac{p (1 - p )}{n} }

=>  \sigma  = \sqrt{\frac{0.96 (1 - 0.96 )}{227} }

=>  \sigma  = 0.0130

Generally the sample proportion is mathematically represented as

      \^ p =  \frac{k}{n}

=> \^ p =  \frac{209}{227}

=> \^ p =  0.9207

Generally probability of obtaining a sample proportion as low as or lower than this, if the university’s claim is true, is mathematically represented as

     P( p <  0.9207) = P( \frac{\^ p - p }{\sigma } <  \frac{0.9207 - 0.96}{0.0130 }  )

\frac{\^ p - p}{\sigma }  =  Z (The  \ standardized \  value\  of  \ \^ p )

   P( p <  0.9207) = P(Z< -3.022 )

From the z table  the area under the normal curve to the left corresponding to    -3.022  is

     P(Z< -3.022 ) = 0.0012556

=> P( p <  0.9207) = 0.0012556

6 0
3 years ago
I put this into my calculator but it keeps coming out as "error" :/ not sure if it's just my calculator or something with the pr
Triss [41]
Your calculator says error because you cant have a square root of a negative number because there is no solution to that maybe recheck your equation and try again
8 0
3 years ago
Why is 1/2 of 2 equals one whole
algol [13]
Hey There :)

This is because one is half of two. You could also multiply 2 * 0.5= 1, 0.5 represents \frac{1}{2} and two is the whole number. This is how \frac{1}{2} of two equals one.

Have A Brainly Day :)
8 0
3 years ago
Read 2 more answers
You’ve seen two methods for finding the area of ΔABC—using coordinate algebra (by hand) and using geometry software. How are the
Phantasy [73]

AnsweYou’ve seen two methods for finding the area of ΔABC—using coordinate algebra (by hand) and using geometry software. How are the two methods similar? How are they different? Why might coordinate algebra be important in making and using geometry software?

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Step-by-step explanation:

8 0
2 years ago
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