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Agata [3.3K]
4 years ago
9

In a recent study, 50 males used a new weight-loss supplement, and 38 of them experienced weight loss after two weeks. In the sa

me study, 100 females used the same supplement, and 85 of them experienced weight loss after two weeks. Fill in the blanks of the statement below to make the statement the most reasonable possible. The new weight-loss supplement was more effective on ? in the study because only % of them failed to lose weight after two weeks, % of the ? whereas failed to lose weight after two weeks. ?
Mathematics
2 answers:
Aliun [14]4 years ago
7 0

Answer:

The new weight-loss supplement was more effective on females in the study because only 85% of them failed to lose weight after two weeks, 15% of the females whereas failed to lose weight after two weeks.

Step-by-step explanation:

Male proportion that lose weight

p_m=38/50=0.76

Female proportion that lose weight

p_f=85/100=0.85

Proportion of females that failed to lose weight

p_{f2}=1-0.85=0.15

Montano1993 [528]4 years ago
3 0

Answer:

Step-by-step explanation:

Males proportion who did not lose weight = 12/50 = 24%

Females proportion who did not lose weight = 15/100 = 15%

Thus we find this was effective for females compared to males.

he new weight-loss supplement was more effective on females in the study because only 15% of them failed to lose weight after two weeks, whereas 24% of the males failed to lose weight after two weeks.

So answer is Females, 15 and 24.

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Kala call lasted for 0.36 minutes

<em><u>Solution:</u></em>

Given that Kala purchased a prepaid phone card for $15

Long distance calls cost $12 a minute using this card.

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To find: Number of minutes her call lasted

Let "x" be the number of minutes her call lasted

Cost of 1 minute = $ 12

Total balance = $15

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Total balance = Remaining balance + Cost of 1 minute x number of minutes her call lasted

15 = 10.68 + 12 \times x\\\\15 - 10.68 = 12x\\\\4.32 = 12x\\\\x = 0.36

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Let x be a random variable representing percentage change in neighborhood population in the past few years, and let y be a rando
Lisa [10]

Answer:

m=\frac{2506.833}{604.833}=4.1447  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{77}{6}=12.833  

\bar y= \frac{\sum y_i}{n}=\frac{587}{6}=97.833  

And we can find the intercept using this:  

b=\bar y -m \bar x=97.833-(4.1447*12.833)=44.644  

So the line would be given by:  

y=4.1447 x +44.644  

Step-by-step explanation:

m=\frac{S_{xy}}{S_{xx}}  

Σx = 77, Σy = 587, Σx2 = 1593, Σy2 = 70,533, and Σxy = 10040.

Where:  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}  

With these we can find the sums:  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=1593-\frac{77^2}{6}=604.833  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=10040-\frac{77*587}{6}=2506.833  

And the slope would be:  

m=\frac{2506.833}{604.833}=4.1447  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{77}{6}=12.833  

\bar y= \frac{\sum y_i}{n}=\frac{587}{6}=97.833  

And we can find the intercept using this:  

b=\bar y -m \bar x=97.833-(4.1447*12.833)=44.644  

So the line would be given by:  

y=4.1447 x +44.644  

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