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katovenus [111]
3 years ago
7

Please answer quick!!

Mathematics
2 answers:
Genrish500 [490]3 years ago
7 0

Answer:

first one

Step-by-step explanation:

juin [17]3 years ago
7 0

Answer: Choice B) {2, 4, 6}

Explanation:

The upside down U symbol represents an intersection. In other words, we want to find the numbers that are in both set D and set F at the same time.

Set D is the set of all whole numbers.

Set F is the set of even numbers from greater than or equal to 2, but less than 9.

Set D looks like this D = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ...}

Set F looks like this F = {2, 4, 6, 8}

We see that 2,4,6,8 is in both set D and set F at the same time, so therefore this is the intersection of the two sets.

side note: Set E isn't used at all so we can ignore it.

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100 POINTS! College Statistics
kirza4 [7]

(a) Collision claims tend to be skewed right because there are a few very large collision claims relative to the majority of claims.

These large collision claims skew the data to the right because they are outliers that draw the mean higher than it should be.

The answer cannot be "no large collision claims" or "many large collision claims" because then the data would not be skewed.

(b) Since there are two random samples comparing two means, we will be using a 2-Samp-T-Test. We will use Welch's approximate t-test, where we test the hypothesis that these two populations have the same mean.

We want to determine if 20-24 year old drivers have the same mean collision cost as 30-59 year old drivers.

(c) The null hypothesis is that <u>the mean claim of collision costs for 20-24 year old drivers is the same as the mean claim of collision costs for 30-59 year old drivers.</u>

We can also rewrite this as:

  • H₀: μ₁ = μ₂
  • where μ₁ is the mean collision claims for 20-24 year old drivers
  • and μ₂ is the mean collision claims for 30-59 year old drivers

The alternative hypothesis is that the <u>mean claim of collision costs for 20-24 year old drivers is higher than the mean claim of collision costs for 30-59 year old drivers</u>.

We can rewrite this as:

  • H₁: μ₁ > μ₂
  • Our variables have already been defined

(d) In order to calculate the p-value, we must find the test statistic first.

We can do so by using this formula:

  • \displaystyle t=\frac{x_1-x_2}{\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}  }}

We are given these variables in the problem:

  • x_1=4590
  • s_1=2302
  • x_2=3670
  • s_2=2029
  • n_1=40
  • n_2=40

Substitute these variables into the formula for the test statistic.

  • \displaystyle t=\frac{4590-3670}{\sqrt{\frac{2302^2}{40} +\frac{2029^2}{40} } }

You can use the calculator to solve this expression, or plug the numbers into your calculator using: STAT - TESTS - 4:2-SAMPTTEST.

Your test statistic should be: t = 1.8962.

The calculator should also tell you the p-value; p = .0308.

(e) Since p = .0308 < α = .1, <u>reject</u> the null. We have convincing statistical evidence that the mean claim of collision costs for 20-24 year old drivers is higher than the mean claim of collision costs for 30-59 year old drivers.

4 0
2 years ago
Bradley bought 14 yellow highlighters. each highlighter cost $0.94.how much did Bradley spend?
Svetradugi [14.3K]
The answer would be 13.16$

0.94x14=13.16
6 0
3 years ago
You need to cross a canal and want to determine the distance across the opposite side. Since you're able to take measurements on
MariettaO [177]

Answer:

36.7 ft

Step-by-step explanation:

Measurements for the sides of the canal is given as: 40 ft. and 16 ft.

You solve the above question using Pythagoras Theorem

The distance across the canal is calculated as:

√(40² - 16²)

= √(1344)

= 36.66060556 ft

Approximately = 36.7 ft

Therefore, the distance x across the canal = 36.7 ft

8 0
3 years ago
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU B
blagie [28]

Answer:

im helping so thanks for the

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
I need help with something??? Why is there screams from the next door neighbor?
Irina18 [472]

Answer:

is your neighbor jewish by any chance?

Step-by-step explanation:

DONT TRUST THE GERMANS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

4 0
3 years ago
Read 2 more answers
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