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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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you deposited 8500 dollars in a savings account that earns a simple interest rate what interest rate do you need to be paid if y
anzhelika [568]

we know that

The simple interest formula is equal to

A=P(1+rt)

where

A is the Final Investment Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

in this problem we have

t=5\ years\\ P=\$8,500\\ A=\$10,093.75\\r=?

substitute in the formula above

10,093.75=8,500*(1+r*5)

solve for r

5*r=(10,093.75/8,500)-1

r=0.0375

r=3.75\%

therefore

<u>the answer is</u>

the rate of interest is 3.75\%

3 0
3 years ago
Wesley does this work to find the decimal equivalent of 2399. What does his work tell you about the decimal equivalent?
MrMuchimi

answer is 2399

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6 0
2 years ago
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Barney has 14 dimes and quarters worth $2.15. write the system of equations
grigory [225]

Answer: 14 dimes and 3 quarters

Step-by-step explanation:

14x10=140+25=165+25=190+25=215 aka $2.15 meaning that there is 14 dimes and 3 quarters

5 0
3 years ago
A phone company offers to monthly plans. Plan a cost $23 plus an additional $.08 for each minute of calls. Plan B cost $19 an ad
Anettt [7]

Answer:

The indifference point is 100 minutes.

Step-by-step explanation:

Giving the following information:

Plan a cost $23 plus an additional $.08 for each minute of calls.

Plan B cost $19 an additional $.12 for each minute of calls.

<u>First, we need to establish the total cost formula for each plan:</u>

Plan A= 23 + 0.08*x

Plan B= 19 + 0.12*x

x= number of minutes

<u>Now, to calculate the indifference point, we equal both formulas and isolate x:</u>

23 + 0.08x = 19 + 0.12x

4 = 0.04x

100= x

The indifference point is 100 minutes.

<u>Prove:</u>

Plan A= 23 + 0.08*100= $31

Plan B= 19 + 0.12*100= $31

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Tpy6a [65]
The answer is C your welcome Gn
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