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3 years ago

Evaluate the expression.

Mathematics

1 answer:

liq [111]3 years ago

3 0

Answer:

4.23076923077

Step-by-step explanation:

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g A researcher conducts a hypothesis test where he compares the scores of a random sample of students' SAT scores to the nationa

elena-s [515]

Answer:

Let level of significance is $\alpha$ =0.05

Since p-value is greater than alpha so students' mean score does not significantly differ from the national average.

Correct option is:

His students' mean score does not significantly differ from the national average, because his p-value is greater than alpha.

Let level of significance is $\alpha$ =0.10

Since p-value is less than alpha so students' mean score does significantly differ from the national average.

Correct option is:

His students' mean score does significantly differ from the national average, because his p-value is less than alpha.

6 0

3 years ago

There are 7 cherries and 3 grapes in a bag. What is the pobability of selecting 2 grapes at random without replacement?

dlinn [17]

Answer:

1/15

Step-by-step explanation:

7+3 = 10 items in the bag

P(grape) = grapes/total

3/10

No replacement

7 cherries 2 grapes = 9 items

P(grape) = grapes/total

2/9

P(grape, no replacement, grape) = 3/10*2/9

=1/15

3 0

3 years ago

3. Suppose U= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} is the universal set and Q = {3.6.9}. What is Q?

Dimas [21]

Answer:

Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and M={7,8,9,10}. What is M'?

A. {1,2,3,4,5,6}

B. {1,2,3,4,5,6,7,8,9,10}

C. cannot be determined

D. {7,8,9,10}

My answer is D.

Step-by-step explanation:

M' means the complement of M.

M' will encompass all the elements in the universal set but NOT in the set M.

4 0

3 years ago

The line y = 2x + 5 would pass through which of the following points?

vlada-n [284]

Hello!

$\large\boxed{ (0, 5)}$

Recall that the first number in the coordinate is 'x', and the second number is 'y'.

Since all the answer choices have '0' as the x-coordinate, we can substitute in this value for 'x' in the equation for the line to solve for the correct y-value.

y = 2(0) + 5

y = 5

The only answer choice that has this combination is D, (0, 5). This is the correct answer.

6 0

2 years ago

Read 2 more answers

Each time Sam takes a shot the probability that he will score is 5/8

Marrrta [24]

Answer:

5/8 is it simplified

Step-by-step explanation:

7 0

3 years ago