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2 years ago

I need help on this question below

Mathematics

1 answer:

kumpel [21]2 years ago

3 0

I think it’s the Second one

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A basketball player guesses her team will score 57 points during the game. The player's team actually scores 63 points.

Dovator [93]

6 points i think that is the answer

4 0

3 years ago

Read 2 more answers

The mean income per person in the United States is $44,500, and the distribution of incomes follows a normal distribution. A ran

Artist 52 [7]

Answer:

We conclude that the residents of Wilmington, Delaware, have higher income than the national average

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $44,500

Sample mean, $\bar{x}$ = $52,500

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, s = $9,500

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu = 44,500\text{ dollars}\\H_A: \mu > 44,500\text{ dollars}$

We use one-tailed(right) t test to perform this hypothesis.

c) Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{52500 - 44500}{\frac{9500}{\sqrt{16}} } = 3.37$

b) Rejection rule

If the calculated t-statistic is greater than the t-critical value, we fail to accept the null hypothesis and reject it.

Now,

$t_{critical} \text{ at 0.05 level of significance, 15 degree of freedom } = 1.753$

Since,

$t_{stat} > t_{critical}$

We fail to accept the null hypothesis and reject it. We accept the alternate hypothesis. We conclude that the residents of Wilmington, Delaware, have higher income than the national average

5 0

2 years ago

2.75+0.003+0.158 it has been a while since I have had a math class. I forgot how I am suppose to line the decimal points up. Tha

g100num [7]

2.750
0.003
+ 0.558
________
3.421

4 0

2 years ago

CAN SOMEONE HELP ME WITH THIS PLEASE AND THANK YOU.

Aloiza [94]

If you convert the fractions to improper, you get 9/2 times 7/4. you can then just multiply the tops and bottoms and simplify! hope this helps

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2 years ago

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This is middle school work

inysia [295]

Answer:

The deer population decreased. The producers increased. So the number of different species increased.

Step-by-step explanation:

wolves are reintroduced ---> deer population decreases --> producer population begins to increase --> other species numbers increase as well

7 0

2 years ago