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victus00 [196]
3 years ago
6

Help please! Thank you!!

Mathematics
1 answer:
umka2103 [35]3 years ago
3 0

Answer:

i dont know what it is

Step-by-step explanation:

maybe a

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Researchers investigated the possible beneficial effect on heart health of drinking black tea and whether adding milk to the tea
Elanso [62]

Answer:

(a)  It is an experiment.

(b) Group III has been tested to compare the effect of tea

Step-by-step explanation:

24 volunteers are randomly selected to one of the three groups.

Group I drinks two cups of hot black tea without milk

Group II drinks two cups of hot black tea with milk

Group III drinks two cups of hot water but no tea.

At the end of the month, the researchers measured the change in each of the participant's heart health.

The average change of health status of three Groups can be measured and let it be X1', X2' and X3'. We can set up the hypothesis of no difference of heart health i.e H0 : µ1 = µ2 = µ3 against the alternative hypothesis that they are not equal. As the sample size is less than 30, we can use t-statistic.

Under the above logic, (a) it is an experiment.

(b) Group III has been tested to compare the effect of tea or to have comparison between GroupI and Group III.

4 0
3 years ago
The cost of turkey is directly proportional to its weight. If a 12-pount turkey costs $27, how much does a 13-pound turkey cost?
Pavel [41]

Answer:

$29.25

Step-by-step explanation:

Divide the cost of the turkey by 12 to obtain the unit cost then multiply this by 13

cost = \frac{27}{12} × 13 = $29.25


6 0
3 years ago
Read 2 more answers
Wendy needs to purchase 25 vases, which cost $3 each, and flowers for the vases, which cost $2 each. She has $275 to spend on he
Levart [38]
The answer is A.

The cost of 25 vases would be $75 (25*3). then x would be the number of flowers she can buy at $2 each before she goes over $275. So, $2x+$75 < $275
5 0
2 years ago
What is the standard form of (7-5i)(2+3i)?<br> A.-29+11i<br> B.29+11i<br> C. 11-29i<br> D.-11+29i
Lubov Fominskaja [6]
It might be the last one but I don't know
5 0
3 years ago
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Maria has a net spendable Income of 51,900 per month. What is the maximum amount of money that she should budget for transportat
Over [174]

Answer:

b

Step-by-step explanation:

7 0
3 years ago
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