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TEA [102]
3 years ago
15

I'LL GIVE BRAINLIEST TO WHOEVER ANSWERS THE QUESTION CORRECTLY!!!!

Mathematics
1 answer:
Yakvenalex [24]3 years ago
7 0

I think it is false

I'm not sure if this is correct

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Austin brought 2,500 grams of red apples and 3,500 grams of Green apple.How many kilograms of apples did austin buy?
rjkz [21]
A kilo gram is half of a gram so add 3,500 to 2,5000 and then divide by two thx 

4 0
3 years ago
Last week Kelly ran 28 Miles. This week she ran 32 miles. What was the percent change in number of miles she ran?
scZoUnD [109]

Hey!

4/28 =?
= 1/7.
1/7 =?
=14.3%

Hope this helped!
8 0
3 years ago
In a random sample of 60 shoppers from a large suburban mall, 36 indicated that they had been to a movie in the past month. In a
ZanzabumX [31]

Answer:

There is no enough statistical evidence to reject the hypothesis that the proportion of suburban mall shoppers who had been to a movie in the same month is the same as the proportion downtown.

Step-by-step explanation:

We have to perform an hypothesis test on the difference of proportions to see if there is enough evidence to reject the null hypothesis.

The null and alternative hypothesis are:

H_0: \pi_1-\pi_2=0\\\\H_a: \pi_1-\pi_2\neq0

The significance level is assumed to be α=0.05

The suburban sample has  a proportion of

p_1=36/60=0.6

The downtown sample has a proportion of

p_2=31/50=0.62

The average of proportion is:

p=\frac{n_1p_1+n_2p_2}{n_1+n_2}=\frac{60*0.60+50*0.62}{60+50}=\frac{67}{110}=0.61

The standard deviation of the difference of proportions is:

s_{p1-p2}=\sqrt{\frac{p(1-p)}{n_1} +\frac{p(1-p)}{n_2} } =\sqrt{\frac{0.61*0.39}{60} +\frac{0.61*0.39}{50} }\\\\s_{p1-p2}=\sqrt{0.003965+0.004758}=0.0934

Then, we can calculate the value of the statistic z

z=\frac{p_1-p_2}{s}=\frac{0.60-0.62}{0.0934}=\frac{-0.02}{0.0934} =  0.214

The P-value for this z is:

P(|z|>0.214)=0.83054

The P-value is bigger than the significance level, so there is no enough evidence to reject the null hypothesis.

7 0
3 years ago
How to simplify 3x-1
Murljashka [212]

Answer:

9×2

Step-by-step explanation:

(-3x)2=-3x×-3x=9×2

5 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!!!!!!
erik [133]

Answer: D

Step-by-step explanation:

7 0
3 years ago
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