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solong [7]
3 years ago
5

PLEASE PLEASE PLEASE HELP HELP HELP?!?!?!?!?!!?!??!?!?!

Mathematics
1 answer:
nadezda [96]3 years ago
8 0

Answer is A

Step-by-step explanation:

hope that helps

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You want to construct a 92% confidence interval. The correct z* to use is
Vaselesa [24]

Answer:

1) The correct z* to to construct a 92% confidence interval is 1.75

2) these results are not good evidence that the new curriculum has improved Math SAT scores.

3) the results are not statistically significant at level α = 0.05, but they are practically significant.

Step-by-step explanation:

1) z-score for 92% confidence level is ≈ 1.75

2) P-value for testing whether the mean score in senator's state is more than the national average of 480 is less than 0.0001 means that

the probability that the sample is drawn from the population where senator's state is more than the national average of 480 is <0.0001.

Thus we have to reject this hypothesis since the probability is too small.

3) if we calculate the statistic of the sample we get (560-480)/100=0.8 where

  • 560 is the mean score of trained 4 students
  • 480 is the mean math sat score of this year
  • 100 is the standard deviation of the test.

Since t-critical at 0.05 significance for 3 degrees of freedom ≈ 2.35 is bigger than 0.8, the result is not significant statistically.

But 80 points higher than the national average is a practically significant result since its <em>effect size</em> is large.

6 0
3 years ago
The area of a gymnasium floor is 264 aquare yards. The floor is 11 yards wide. How long is the foor
jok3333 [9.3K]
Length = area / width
=  264 / 11
= 24 yards
5 0
3 years ago
Can someone please help me with this problem? A fastpitch softball player signs a six year contract. Her agent expects that she
Luba_88 [7]

Answer:

The question is not complete, below is the complete question:

A fastpitch softball player signs a six-year contract. Her agent expects that she will earn $1,000,000 over the next six years. If the agent is right, how many bonus payments, on average, should the pitcher expect each year? Explain

Yearly Salary: $20.000. Bonus for each game that attracts 100+ fans: $8.000.

Answer:

on average, the pitcher expects to earn 18.3 bonuses per year

Step-by-step explanation:

Total amount earned over the next 6 years = $1,000,000

salary per year = $20,000

salary for the next 6 years = 20,000 × 6 = $120,000

Next, let us calculate the amount earned from bonuses:

Total amount earned = amount earned from salaries + amount earned from bonuses

$1,000,000 = 120,000 + Amount earned from bonuses

Amount earned from bonuses = 1,000,000 - 120,000

Amount earned from bonuses = $880,000

Total bonus amount earned over six years = $880,000

Amount of bonus earned per game = $8,000

Number of bonuses received over the next 6 years = (Total bonus earned over six years) ÷ (Amount of bonus earned per game)

Number of bonus received over the next 6 years = 880,000 ÷ 8,000

Number of bonus received over the next 6 years = 110 bonuses

6 years = 110 bonuses

1 year = 110 ÷ 6 = 18.33 bonuses

on average, the pitcher expects to earn 18.3 bonuses per year

5 0
3 years ago
Problem Solving
OlgaM077 [116]

Answer:

168 shirts

Step-by-step explanation:

7*24=168

7=boxes

24=shirts per box

6 0
3 years ago
Tim used the expression below, where n represents side length, to determine the volume of a cube. Using this
I am Lyosha [343]

Complete question :

Tim used the expression below, n³ where n represents side length, to determine the volume of a cube. Using this

expression, what is the volume of a cube with side length 3.5 inches? Show your work.

n?

Answer:

42.875 cubic inches

Step-by-step explanation:

Given that :

The formula to obtain the volume of a cube is n³ ; where n = side length of the cube.

The side length of a certain cube is given as = 3.5 inches.

The volume of the cube is calculated thus :

Volume = n³ = 3.5³

Volume = (3.5 * 3.5 * 3.5) inch³

Volume = 42.875 in³

4 0
3 years ago
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