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2 years ago

I need help, its driving me crazy, please include workings out.

Mathematics

1 answer:

insens350 [35]2 years ago

3 0

Answer:

It's driving me crazy!

It's driving me crazy

I don't know where I stand, there's just too many people around

It's driving me crazy

I just don't understand, I'm looking but I'm making no ground

It's driving me crazy

But I know that there's no need to worry, gonna get ya

Though they tell me there's no need to hurry, got to run me down

It's driving me crazy

I don't know where I stand, there's just too many people around

It's driving me crazy

I just don't understand, I'm looking but I'm making no ground

It's driving me crazy

If you see me, you'd better start runnin', better run run

'Cause I'm telling you I'll be out guarding, gonna run you down

It's driving me crazy, it's driving me crazy

It's driving me crazy, it's driving me crazy, it's driving me crazy

It's driving me crazy

I don't know where I stand, there are just too many people around

It's driving me crazy

I just don't understand, I'm looking but I'm making no ground

It's driving me crazy

It's driving me crazy, it's driving me crazy, it's driving me crazy

Crazy, crazy, oooh, oooh, crazy, crazy, ooooh oooh,

Crazy, crazy, oooh ooooh, I'm going crazy, crazy...

Step-by-step explanation:

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Past data indicate that the amount of money contributed by the working residents of large two cities to a volunteer rescue squad

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Answer:

$F=\frac{s^2_1}{s^2_2}=\frac{1.10^2}{2.9^2}=0.144$

$p_v =P(F_{8,5}$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude tha the variance in city 1 is less than the variance in city 2

Step-by-step explanation:

Data given

$n_1 = 9$ represent the sampe size for group 1

$n_2 =6$ represent the sample size for group 2

$s_1 = 1.10$ represent the sample deviation for group 1

$s_2 = 2.90$ represent the sample deviation for group 2

$\alpha=0.05$ represent the significance level provided

Confidence =0.95 or 95%

Solution to the problem

System of hypothesis

We want to test if the variance in city 1 is less than the variance in city 2., so the system of hypothesis are:

H0: $\sigma^2_1 \geq \sigma^2_2$

H1: $\sigma^2_1$

Calculate the statistic

The statistic is given by:

$F=\frac{s^2_1}{s^2_2}$

Replacing we got:

$F=\frac{s^2_1}{s^2_2}=\frac{1.10^2}{2.9^2}=0.144$

We need to find the degrees of freedom. For the numerator we have $n_1 -1 =9-1=8$ and for the denominator we have $n_2 -1 =6-1=5$ and the F statistic present 8 degrees of freedom for the numerator and 5 for the denominator.

P value

$p_v =P(F_{8,5}$

Since the p value is lower than the significance level we have enough evidence to reject the null hypothesis and we can conclude tha the variance in city 1 is less than the variance in city 2

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3 years ago