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Fudgin [204]
3 years ago
14

A two year community college has decided to implement a new approach to teaching probability. Full-time and adjunct faculty were

surveyed to determine whether they preferred the traditional lecture approach or a computer approach to teaching probability. The results are listed below. Use hypothesis testing to test the independence of opinion between the two groups.
Prefer Lecture Prefer Computer No Preference
Full-time 8 13 6
Adjunct 11 22 10

Required:
a. Calculate the expected value of an adjunct professor who prefers to lecture.
b. What is the expected value of an adjunct professor who prefers computer instruction
Mathematics
1 answer:
Gemiola [76]3 years ago
3 0

Answer:

knl k knl

Step-by-step explanation:

ljh kjnjknojn[ojnk  pj

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The answer is 1/7 and can be explained mathematically in the picture

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Answer: 5 times

Step-by-step explanation:

Let the number of times that he saved $75 be x.

Let the number of times that he saved $150 be y.

Therefore, based on the information given in the question, we can form an equation which will be:

x + y = 8 ...... i

75x + 150y = 825 ....... ii

From equation I,

x + y = 8

y = 8 - x....... iiii

Put equation iii into ii and this will be:

75x + 150y = 825

75x + 150(8 - x) = 825

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75x - 150x = 825 - 1200

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x = 375/75

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3 years ago
How many natural numbers N have the property among 1,2,..........,N exactly 30% are divisible by 3?
k0ka [10]

Answer:

The answer is B. 2.

Step-by-step explanation:

We know that for N = 1 and N = 2, none of them are divisible by 3.

For N = 3, 33.33% are divisible by 3.  For N = 4, 25% (which is already less than 30%), so N = 5 would also be less.

At N = 6, we're back up to 33.33%.  N = 7 is already less than 30%.

At N = 9, you guessed it, 33.33%.  N = 10 is 30% (3, 6, and 9).  So we have one case.

Moving along, at N = 18, 33.33%.  N = 20 is again 30% (3, 6, 9, 12, 15, and 18).  Two cases now.

Finally, at N = 21, again 33.33%.  N = 22 and N = 23 are both greater than 30%.  As we continue this, for any N after 20, we will always be greater than 30%.

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3 years ago
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Licemer1 [7]

Answer: c. Nominal

Step-by-step explanation:

Level of measurement determines the nature of description .

The four levels of measurements scales are

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2. Ordinal scale

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3. Interval scale

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4. Ratio scale

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