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3 years ago

Does this table represent a question?

Mathematics

1 answer:

Alexandra [31]3 years ago

3 0

If we first look at it doesn't look like a question. Maybe because it is incomplete, or we can assume that the table indicates that you must plot the x and y to show what image it is showing. But in the first impression. It is not a question

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To save money, a local charity organization wants to target its mailing requests for donations to individuals who are most suppo

mars1129 [50]

Answer:

The 80% confidence interval for difference between two means is (0.85, 1.55).

Step-by-step explanation:

The (1 - α) % confidence interval for difference between two means is:

$CI=(\bar x_{1}-\bar x_{2})\pm t_{\alpha/2,(n_{1}+n_{2}-2)}\times SE_{\bar x_{1}-\bar x_{2}}$

Given:

$\bar x_{1}=M_{1}=6.1\\\bar x_{2}=M_{2}=4.9\\SE_{\bar x_{1}-\bar x_{2}}=0.25$

Confidence level = 80%

$t_{\alpha/2, (n_{1}+n_{2}-2)}=t_{0.20/2, (5+5-2)}=t_{0.10,8}=1.397$

*Use a t-table for the critical value.

Compute the 80% confidence interval for difference between two means as follows:

$CI=(6.1-4.9)\pm 1.397\times 0.25\\=1.2\pm 0.34925\\=(0.85075, 1.54925)\\\approx(0.85, 1.55)$

Thus, the 80% confidence interval for difference between two means is (0.85, 1.55).

3 0

3 years ago

1/1×3+1/2×4+1/3×5 +...+1/18×20= Please, help me. ❣️

Sedaia [141]

Answer:3.1944

Step-by-step explanation:

(1÷1×3)+1÷(2×4)+1÷(3×5)+1÷(18×20)

6 0

3 years ago

Can u help me please

kow [346]

Answer:

where's the number?

Step-by-step explanation:

4 0

3 years ago

Can you please multiply this (–2.3)(6.5)

liubo4ka [24]

Hello There!

-2.3 x 6.5 = -14.95.

The answer is -14.95.

Hope This Helps You!
Good Luck :)

- Hannah ❤

3 0

4 years ago

Read 2 more answers

Does anyone know the answer to this ?

Akimi4 [234]

Answer:

2.5mph

Step-by-step explanation:

S = Distance divided by Time (S = D/T)

Therefore.

S = 15/6

=2.5 mph

Colin walked an average speed of 2.5mph

3 0

3 years ago

Read 2 more answers