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elena-14-01-66 [18.8K]
3 years ago
8

A marketing company surveys 100 males and 100 females between the ages of 55 and 70 to determine how many times they text each d

ay. The mean for males is 6 with a range of 4. The mean for the females is 8 with a range of 4. According to the statistics, which statement is TRUE?
A)
On average, females text more than males.

B)
On average, females text less than males.

C)
On average, females and males text about the same .

D)
On average, both males and females text 4 times each day.
Mathematics
1 answer:
beks73 [17]3 years ago
4 0

Answer: I believe that A is the correct answer.

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What is the average rate of change of the function f(x)=480(0.3)x from x = 1 to x = 5?
m_a_m_a [10]

aerage rate of change is just the slope from the endpoints of teh interval


ie averagerateofchange=slope=\frac{f(5)-f(1)}{5-1}

assuming you mean f(x)=480(0.3)^x

evalaute f(5) and f(1)

f(5)=480(0.3)^5=1.1664

f(1)=480(0.3)^1=144


average rate of change=(1.1664-144)/(5-1)=-35.7084


the average rate of change of the function on the interval x=1 to x=5 is -35.7084

8 0
3 years ago
|-2| ≥ |-3|<br><br> True<br> False
ValentinkaMS [17]

Answer:

FALSE

Step-by-step explanation:

if you didnt know those little bars mean absolute value and the absolute value of a negative number is the same number but while positive if that makes sense so the equation is pretty much saying 2≥3 which is not true

hope this helps and if you have any questions lmk :D

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2 years ago
Read 2 more answers
Simplify the expression: 5(1 - 9a)
Marina CMI [18]
<h2>Answer:</h2><h2>5 − 45a </h2><h2>~</h2><h3>Hope you have a good day, Loves!</h3>

Also if I'm right can you let me know please?

Also Also if I am right can I please have Brainliest??

<em>You don't need to, I'm just glad I could help. ^^</em>

6 0
2 years ago
Each year the US Environmental Protection Agency (EPA) releases fuel economy data on cars manufactured in that year. Below arc s
fomenos

Answer:

Follows are the solution to this question:

Step-by-step explanation:

Please find the complete question in the attachment file.

n_1 = 26 \\\\ x_1 = 16.12 \\\\s_1 = 3.58\\\\n_2 = 26\\\\ x_2 = 19.85 \\\\ s_2 = 4.51

H_0: u_1 = u_2\\\\H_1: u_1 \neq u_2

Using formula:

\to S^{2}_{p}=\frac{S^{2}_{1}(n_1 -1)+ S^{2}_{2}(n_2-1)}{n_1+n_2-2}

\to Sp^2 = \frac{((26-1) \times (3.58^2) + (26-1) \times (4.51^2))}{(26+26-2)}

          = \frac{((25) \times 12.8164 + (25) \times 20.3401 )}{(26+24)}\\\\ = \frac{(320.41 + 508.5025)}{(50)}\\\\ = \frac{(828.9125)}{(50)}\\\\=16.57825

\to Sp = 4.0716

Calculating the value of standard error:

\to SE = Sp \times \sqrt{\frac{1}{n_1}+\frac{1}{n_2}}

          =4.0716 \times \sqrt{\frac{1}{26}+\frac{1}{26}}\\\\=4.0716 \times \sqrt{\frac{1+1}{26}}\\\\=4.0716 \times \sqrt{\frac{2}{26}}\\\\=4.0716 \times \sqrt{\frac{1}{13}}\\\\=4.0716 \times 0.277 \\\\=1.1278332\\\\= 1.1293

Calculating the value of test statistic:

Formula:

\to t = \frac{(x_1-x_2)}{SE}

      = \frac{(16.12 -19.85)}{1.1293}\\\\= \frac{(-3.73)}{1.1293}\\\\=-3.303

Calculating the value of Degree of freedom:

= n_1+n_2 -2 \\\\= 26+26 -2 \\\\= 52 -2 \\\\= 50

Because the P-value is a 2-tailed test = 0.0018

Thus they reject H0, because of P-value < 0.05,

Yeah, certain data show clearly that the means are different.

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2 years ago
Reggie Turner worked 4.5 hours on Monday, from 9:45 am to 3:30 pm on Wednesday, and from
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Answer:

Around 14 hours.

Step-by-step explanation:

Just add up all the hours.

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3 years ago
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