What is the solution for the proportion below 8/9 = m / 72?

Ipatiy [6.2K]

Give kabab to Adam

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7 0

3 years ago

In a study of the accuracy of fast food drive-through orders, one restaurant had 40 orders that were not accurate among 307 ord

klemol [59]

Answer:

We conclude that the rate of inaccurate orders is greater than 10%.

Step-by-step explanation:

We are given that in a study of the accuracy of fast food drive-through orders, one restaurant had 40 orders that were not accurate among 307 orders observed.

Let p = population proportion rate of inaccurate orders

So, Null Hypothesis, $H_0$ : p $\leq$ 10% {means that the rate of inaccurate orders is less than or equal to 10%}

Alternate Hypothesis, $H_A$ : p > 10% {means that the rate of inaccurate orders is greater than 10%}

The test statistics that will be used here is One-sample z-test for proportions;

T.S. = $\frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of inaccurate orders = $\frac{40}{307}$ = 0.13

n = sample of orders = 307

So, the test statistics = $\frac{0.13-0.10}{\sqrt{\frac{0.10(1-0.10)}{307} } }$

= 1.75

The value of z-test statistics is 1.75.

Also, the P-value of the test statistics is given by;

P-value = P(Z > 1.75) = 1 - P(Z $\leq$ 1.75)

= 1 - 0.95994 = 0.04006

Now, at 0.05 level of significance, the z table gives a critical value of 1.645 for the right-tailed test.

Since the value of our test statistics is more than the critical value of z as 1.75 > 1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region.

Therefore, we conclude that the rate of inaccurate orders is greater than 10%.

8 0

3 years ago

Monica does not initially put any money into the account but plans to deposit $153.46 per week.

Dafna1 [17]

M=153.46w, L=128.90+127.68w they will be equal when M=L so

153.46w=128.90+127.68w subtract 127.68 from both sides...

25.78w=128.90 divide both sides by 25.78

w=5

So after five weeks they have deposited the same amount of money.

Each of them has deposited $153.46*5=$767.30, so the account has twice that amount.

Thus the total amount in the account is 767.30*2=$1534.60

4 0

3 years ago

Read 2 more answers

a bucket contains 5 green balls, 2 yelllow balls, 6 red balls, 8 blue balls. You remove 4 balls, without replacement from the bu

zavuch27 [327]

4/133. As you remove each ball from the bucket, the total number of balls goes down by 1.
the equation should be
(number of balls of targeted color / all balls in the bucket)
And as you take 4 times, you have to do this for 4 times

6 0

3 years ago

Please help me do not and please give me an explanation too please. No link please

krok68 [10]

Answer:

I'm pretty sure it's D.40 because it's the biggest number and 6+13+17 is only a bit bigger than 24. Also, all the numbers add up to 60 and 27 is only a bit less than 50% of 60

3 0

3 years ago