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NISA [10]
3 years ago
7

company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its in

itial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that A) only one brand of vitamin was tested B) the study lasted only one year C) the sample size was not large enough D) no control group was used
Mathematics
1 answer:
MAXImum [283]3 years ago
3 0

Answer:

Option D

Step-by-step explanation:

In this experiment, It would have been scientific to compare the result of the experiment on the experimental group(taking the multivitamin) with the control group (Taking no medicine)

Without a control group, a defined impact of multivitamin over the experimental group cannot be deduced.

Hence, option D is correct

You might be interested in
Which graph models the solution set of 50x + 150y>1500?
hodyreva [135]

Answer:

see attached diagram

Step-by-step explanation:

First, draw the dashed line 50x+150y=1500 (dashed because the inequality is without notion "or equal to"). You can do it finding x and y intercepts.

When x=0, then 150y=1500, y=10.

When y=0, then 50x=1500, x=30.

Connect points (0,10) and (30,0) to get needed dashed line.

Then determine which region (semiplane) you have to choose. Note that origin's coordinates  (0,0)  do not satisfy the inequality 50x + 150y>1500, because

50\cdot 0+150\cdot 0=0

This means that origin lies outside the needed region, so you have to choose the semiplane that do not contain origin (see attached diagram).


4 0
3 years ago
Read 2 more answers
Find the slope of the line that passes through (10,8) and (9,13)
Scilla [17]

Se usa está formula

m= pendiente

m=Y2-Y1/X2-X1

Resolución

13-8/9-10= 5/-1= -5

R=-5

3 0
4 years ago
A $8,000 principal is invested in two accounts, one earning 1% interest and another earning 6% interest. If the total interest f
lana [24]

The amount invested in the first account is $1,500 and $6,500 was invested in the second account.

What is simple interest?

Simple interest is determined as the principal multiplied by the interest rate ,then multiplied by the duration of the investment.

The formula for simple interest on an investment is as shown below:

I=PRT

P=principal=$8,000

R=interest rates= 1% and 6%

T=duration of investment=1 year

Let assume that X was invested at 1% and that the remaining of $8000-X is invested at 6%.

Interest on the first account=X*1%*1

Interest on the first account=0.01X

Interest on second account=($8000-X)*6%*1

Interest on second account=480-0.06X

Total interest=0.01X+480-0.06X

Total interest=480-0.05X

Total interest=$405

405=480-0.05X

0.05X=480-405

0.05X=75

X=75/0.05

X=amount invested in the first account=$1,500

Amount invested in the second account=$8000-X

Amount invested in the second account=$8,000-$1,500

Amount invested in the second account=$6,500

Find out more about simple interest on:brainly.com/question/1115815

#SPJ1

4 0
2 years ago
What is the answer to 20+x>70
choli [55]
20+x>70
-20. -20. on both sides to even it out

x>50 is the answer
7 0
3 years ago
Write 108,000 in<br>scientific notation.​
Yuki888 [10]

Answer:

10.8 * 10³

Step-by-step explanation:

7 0
3 years ago
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