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vova2212 [387]
2 years ago
15

Can some one help me with this math problem please?

Mathematics
1 answer:
-BARSIC- [3]2 years ago
8 0
Both the work and explanation is in the picture.

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Hayden wanted to investigate whether there was a difference in the time spent in the checkout line between two grocery stores. S
Ber [7]

Answer:

No.  The data in this study were not based on a random method.  This is a key requirement for an inference to be made from the two-sample t-test.

Step-by-step explanation:

1. Hayden can use the two-sample t-test (also known as the independent samples t-test)to find out if there was a difference in the time spent in the checkout time between two grocery stores and to conclude whether the difference in the average checkout time between the two stores is really significant or if the difference is due to a random chance.  There are three conditions to be met when using the two-sample t-test.

2. The first condition is that the sampling method must be random.  This requirement was not met in this study.  Each customer from each store should have an equal chance of being selected for the study.  This was not achieved.

3. The distributions of the sample data are approximately normal.  This is achieved with a large sample size of 30 customers selected for each study.

4. The last but not the least condition is the independence of the sample data.  Sample data here is independent for both samples.

5 0
3 years ago
You roll a fair 6-sided die.what is P(roll a 2)?
Anton [14]

Answer:

it would be 1/6 there are a possible of 6 outcomes

Step-by-step explanation:

6 0
2 years ago
Amy wants to carpet a room that is 12 feet by 8 feet.
Alex17521 [72]
1\ ft=0.333\ yards\\8\ ft=8\cdot0.333=2.664\ yards\\12\ ft=12\cdot0.333=3.996\ yards\\\\2.664\cdot3.996=10.645\ square\ yards\\\\She\ need\ 10.645\ square\ yards\ of\ carpet.
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3 years ago
There are ways to find the area under a normal curve.<br><br> True or false?
Mrrafil [7]

Your answer would be false.

7 0
3 years ago
Read 2 more answers
Find the amount A accumulated after investing a principle P= $2,000 for t= 8 years at an interest rate r= 6%
Elenna [48]
I=prt

(2000)(.06)(8)

=960
3 0
3 years ago
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