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sammy [17]
3 years ago
9

Gwen borrowed $20 from her mother to buy a scarf. Then, she went to her favorite department store and charged a pair of boots fo

r $120 and boot socks for $12. Which absolute value statement describe's Gwen's total debt?
A) |152|= 152
B) |-152| = $152
C) -|152| = -152
D) -|-152| = -152
Eliminate
What is another way to express 16?
A) 42
B) 23
C) 4 x 2
D) 14


Home Rentals

Greenville Decatur Fayetteville Centerpoint
$980 $1,020 $560 $875
$750 $850 $950 $560
$690 $550 $1,100 $695
$830 $660 $875 $1200
$885 $1,000 $750 $825
$830 $750 $650 $700

Maria is looking for a place to move. She has narrowed it down to 4 towns: Greenville, Decatur, Fayetteville, and Centerpoint. She wants to live where the median rental for a house is the lowest. Where should she live?
A) Centerpoint
B) Decatur
C) Fayetteville
D) Greenville

Where is the opposite of 8 located on a number line?
A) to the left of 0
B) to the right of 0
C) to the right of 8
D) to the right of 1

Divide:

34.65 ÷ 1.5
A) 2.31
B) 21.3
C) 23.1
D) 231

A florist has 66 carnations and 42 roses. What is the greatest number of identical bouquets that can be made without any flowers leftover?
A) 4
B) 5
C) 6
D) 7

The answer to the problem 5 x (4 + 1) is called a _____.
A) sum
B) difference
C) product
D) quotient

Penny is 6 inches taller than Claire. Claire's height can be represented by n. Write an expression to represent Penny's height.
A) 6n
B) n + 6
C) 6 - n
D) n - 6

At Store 1 I can buy 36 oz of baby formula for $26.62, and at Store 2 I can buy 28 oz of baby formula for $22.42. Which one is a better buy and by how much?
A) Store 1 by $0.74 an ounce.
B) Store 2 by $0.06 an ounce.
C) Store 2 by $0.80 an ounce.
Eliminate
D) Store 1 by $0.06 an ounce.
Mathematics
1 answer:
Setler79 [48]3 years ago
3 0
For the 5th question- A
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In a study of 420,095 Danish cell phone users, 135 subjects developed cancer of the brain or nervous system (based on data from
Maksim231197 [3]

Answer:

z=\frac{0.0003214 -0.00034}{\sqrt{\frac{0.00034(1-0.00034)}{420095}}}=-0.654  

p_v =2*P(Z  

So the p value obtained was a very high value and using the significance level given \alpha=0.005 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say that the true proportion not differs significantly from the specified value of 0.00034 or 0.034%.

Step-by-step explanation:

1) Data given and notation  

n=420095 represent the random sample taken

X=135 represent the subjects developed cancer of the brain or nervous system (based on data from the Journal of the National Cancer Institute as reported in USA Today)

\hat p=\frac{135}{420095}=0.0003214 estimated proportion of subjects developed cancer of the brain or nervous system (based on data from the Journal of the National Cancer Institute as reported in USA Today)

p_o=0.00034 is the value that we want to test

\alpha=0.005 represent the significance level

Confidence=99.5% or 0.995

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the brain or nervous system at a rate that is different from the rate of 0.0340% :  

Null hypothesis:p=0.00034  

Alternative hypothesis:p \neq 0.00034  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

3) Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.0003214 -0.00034}{\sqrt{\frac{0.00034(1-0.00034)}{420095}}}=-0.654  

4) Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.005. The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:  

p_v =2*P(Z  

So the p value obtained was a very high value and using the significance level given \alpha=0.005 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say that the true proportion not differs significantly from the specified value of 0.00034 or 0.034%.  

4 0
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HELPPP YOU GET 30 POINTS AND BRAINLIEST
Alex Ar [27]

Answer:

No

Step-by-step explanation:

4 0
3 years ago
What are ALL the solutions for 4-9x ≤40
ivolga24 [154]

Answer:

all work is shown and pictured

5 0
3 years ago
One year ago, you purchased 600 shares of stock for $14 a share. the stock pays $.41 a share in dividends each year. today, you
alukav5142 [94]
If you paid $14 for 600, you paid:

600 * 14 = $8,400.00

If you sold them for $15.30 a share, you made:

600 * 15.30 = $9,180

9,180 - 8,400 = $780

The return on the investment being $780

Very very safe investment and not worth it.
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A steel rod weighing 25 lb 11 oz is cut into three equal pieces. Find the weight of each piece of steel rod. Final answer must b
aleksandrvk [35]

Answer:

200 AND 50

Step-by-step explanation:

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