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alexandr1967 [171]
3 years ago
11

If my goal is to test whether there is any difference in grocery prices between Piggly Wiggly and Publix, which among the follow

ing statement(s) regarding study design, data collection and hypothesis test is/are correct?a. We have to make sure grocery items sampled from Piggly Wiggly are different from grocery items sampled from Publix.b. We have to make sure grocery items sampled from Piggly Wiggly are the same with grocery items sampled from Publix.c. The more data we collect, the better; because we can use 2-sample z test instead of 2-sample t test if the sample size is greater than 30.d. We should use paired t test.e. We should use 2-sample t test with unequal standard deviation.f. We should use 2-sample pooled-t test (equal standard deviation).
Mathematics
1 answer:
ziro4ka [17]3 years ago
8 0

Answer:

I think the answer would be B

Step-by-step explanation:

Because you should use the same items from the two stores to compare the prices.

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What type of conic is given by the equation 4x^2+9y^2=36
zvonat [6]

Answer:

This is equation of ellipse

Step-by-step explanation:

we are given

4x^2+9y^2=36

We can see that right side is 36

so, we can make right side as 1 by dividing both sides  by 36

\frac{4x^2+9y^2}{36} =\frac{36}{36}

\frac{4x^2+9y^2}{36} =1

\frac{4x^2}{36}+\frac{9y^2}{36} =1

we can simplify it

\frac{x^2}{9}+\frac{y^2}{4} =1

we can rewrite it as

\frac{x^2}{3^2}+\frac{y^2}{2^2} =1

now, we can compare it with standard equation of ellipse

\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2} =1

we can see that both equations are similar

so, this is equation of ellipse

8 0
3 years ago
Pls help me find the sum ❣️
Natasha2012 [34]

Answer:

Step-by-step explanation:

4 0
3 years ago
ASAP Please thank you!
Pavel [41]

A cycle in the graph below is HDGH.

A cycle is where a vertices, or corner, can be traced back to itself. HDGH starts with H and traces back to H on the same line.

6 0
3 years ago
Select "Yes" or "No" to indicate whether the ordered pair is on the graph of the function f(x)=−25^x+1.
KengaRu [80]
<span>(1,625) No (0,-25) No (-1,-1) No Think about what an integer exponent means for an negative base and you'll understand this problem. For instance the powers of -25 would be -25^1 = -25 -25^2 = (-25) * (-25) = 625 -25^3 = (-25)*(-25)*(-25) = -15625 and so on, giving 390625, -9765625, 244140625, etc. But that's a different subject. For the ordered pairs given, let's check them out. (1,625) -25^1 + 1 = -25 + 1 = -24. And -24 is not equal to 625, so "No". (0,-25) -25^0 + 1 = 1 +1 = 2. Note: Any real number other than 0 raised to the 0th power is 1. And 2 is not equal to -25, so "No". (-1,-1) -25^(-1) + 1 = 1/(-25^1) + 1 = 1/-25 + 1 = 24/25. And 24/25 is not equal to -1, so also "No".</span>
3 0
3 years ago
Read 2 more answers
Find the coordinates of P ' if D o, 2.4 (x,y) is applied to the triangle below
guajiro [1.7K]

Answer:

The coordinates of P' are (4.8,-4.8).

Step-by-step explanation:

The rule of dilation D_{o,2.4}(x,y) represent the dilation with scale factor 2.4 and center at origin.

If the scale factor of the dilation is k and the center is (0,0), then

(x,y)\rightarrow (kx,ky)

Since the scale factor is 2.4, therefore

(x,y)\rightarrow (2.4x,2.4y)

From the given figure it is noticed that the coordinates of P are (2,-2). The coordinates of P' are

P(2,-2)\rightarrow P'(2.4(2),2.4(-2))

P(2,-2)\rightarrow P'(4.8,-4.8)

Therefore the coordinates of P' are (4.8,-4.8).

3 0
4 years ago
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