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4 years ago

I’m begging you I need your help plz help me I need your help I’m begging you I need your help I swear plz help me plz

Mathematics

2 answers:

nydimaria [60]4 years ago

8 0

I agree with pancake ^
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butalik [34]4 years ago

4 0

I think the choices are A, B ,C

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In a study of 24 criminals convicted of antitrust offenses, the average age was 60 years, with a standard deviation of 7.4 years

Alexxandr [17]

Answer: 56.9 years to 63.1 years.

Step-by-step explanation:

Confidence interval for population mean (when population standard deviation is unknown):

$\overline{x}\pm t_{\alpha/2}{\dfrac{s}{\sqrt{n}}}$

, where $\overline{x}$ = sample mean, n= sample size, s= sample standard deviation, $t_{\alpha/2}$ = Two tailed t-value for $\alpha$ .

Given: n= 24

degree of freedom = n- 1= 23

$\overline{x}$ = 60 years

s= 7.4 years

$\alpha=0.05$

Two tailed t-critical value for significance level of $\alpha=0.05$ and degree of freedom 23:

$t_{\alpha/2}=2.0687$

A 95% confidence interval on the true mean age:

$60\pm (2.0686){\dfrac{7.4}{\sqrt{24}}}\\\\\approx60\pm3.1\\\\=(60-3.1,\ 60+3.1)\\\\=(56.9,\ 63.1)$

Hence, a 95% confidence interval on the true mean age. : 56.9 years to 63.1 years.

5 0

4 years ago

Maksim231197 [3]

Answer:

Step-by-step explanation:

8 0

3 years ago

Find the solution of this system of equations -3x-7y=-66 -10x-7y=-24

andrezito [222]

●✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎❀✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎✴︎●

Hi my lil bunny!

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A) Let's solve for x. $-3x-7y=-66$

Step 1: Add 7y to both sides.

$-3x - 7y + 7y = -66 + 7y \\-3x = 7y - 66$

Step 2: Divide both sides by -3.

$\frac{-3x }{-3} = \frac{7y - 66}{-3}$

$x = \frac{-7}{3}y + 22$

Answer : $\frac{-7}{3}y + 22$

~~~~~~~~~~~~~

B) Let's solve for x. $-10x-7y=-24$

Step 1: Add 7y to both sides.

$-10x - 7y + 7y = -24 + 7y \\-10x = 7y - 24$

Step 2: Divide both sides by -10.

$\frac{-10x}{-10} = \frac{7y - 24}{-10}$

$x = \frac{-7}{10}y + \frac{12}{5}$

Answer : $\frac{-7}{10}y + \frac{12}{5}$

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If this helped you, could you maybe give brainliest..?

❀*May*❀

7 0

4 years ago

You put some money in a bank account one year ago

vaieri [72.5K]

Answer: Balance-28=-0.25(months-8)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The sum of a number,n,and 5

Mnenie [13.5K]

Sum is the answer in addition, so add n and 5

n + 5

6 0

3 years ago

Read 2 more answers