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Gnoma [55]
2 years ago
13

Help, please!!! question in picture

Mathematics
1 answer:
lutik1710 [3]2 years ago
4 0

Answer:

20 m^2

Step-by-step explanation:

First multiply the parallelogram part: 3 x 5 = 15

Then multiply the triangle part: (2 x 5)/2 =5

Then add: 15 + 5 = 20

Good Luck!

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The researchers are concerned that the dollars spent per shopper examined in the study is too different from what has been found
Katarina [22]

Answer:

Step-by-step explanation:

Hello!

To study if the average dollars spend per shopper is different than the expected population average of $84.5 there was a sample of 120 shoppers taken and their spending habit registered.

Then the study variable is:

X: Amount of money spent by a shopper ($)

This population standard deviation is σ= $16

Using the data information I've run a normality test, with p-value: 0.3056 against the test significance level α: 0.05, the decision is to not reject the null hypothesis so there is enough statistical evidence to conclude that the study variable has a normal distribution.

X~N(μ;σ²)

I've also calculated the sample mean and standard deviation:

X[bar]= $81.01

S= $19.62

a.

If the objective is to test that the true mean spending for the population is significantly different than the expected average of 84.5, the parameter of interest is the population mean μ and the hypothesis test will be two-tailed.

H₀: μ = 84.5

H₁: μ ≠ 84.5

α:0.05

The statistic is a standard normal for one sample:

Z= \frac{X[bar]-Mu}{\frac{Sigma}{\sqrt{n} } } ~N(0;1)

Z_{H_0}= \frac{81.01-84.5}{\frac{16}{\sqrt{120} } } = -2.389

p-value two tailed  0.016894

b.

The decision rule using the p-value method is:

If p-value ≤ α ⇒ Reject the null hypothesis.

If p-value > α ⇒ Do not reject the null hypothesis.

Since the p-value is less than the significance level, the decision is to reject the null hypothesis.

c.

Using a level of significance of 5% the null hypothesis was rejected. So there is enough statistical evidence to support the researcher's claim that the true mean spending for the population is significantly different than the expected average of $84.5.

I hope it helps!

3 0
3 years ago
Click on a factor pair of 12<br> 2 and 3<br> 3 and 4<br> 6 and 7<br> 2 and 4
Strike441 [17]
3 and 4! Because 3x4=12 and 4x3= 12! Mark me brainliest so I can help more people !
7 0
3 years ago
Read 2 more answers
Calculate the value of X in the diagram​
Andrew [12]

Answer:

EA =  \frac{21 \times 15}{7}  = 45 \\ { \tt{ \frac{21}{7}   =  \frac{x}{45} }} \\ x = 135

5 0
3 years ago
F(1) = 1<br><br> f(2) = 2<br><br> f(n) = f(n − 2) + f(n − 1)<br><br> f(3)
sweet [91]

Answer:

f(3) = 3

Step-by-step explanation:

f(1) = 1

   

f(2) = 2

f(n) = f(n − 2) + f(n − 1)

f(3) = f(3 - 2) + f(3 - 1)

     = f(1) + f(2) = 1 + 2 = 3

Special Note:  Have you heard of the Fibonacci sequence?  

The formula f(n) = f(n − 2) + f(n − 1) is used to find the terms of the of the  Fibonacci sequence

8 0
3 years ago
Pls help me it would mean alot to me its also due rn<br> plsss and tyy
Alex787 [66]

Answer:

2600/40=65

answer 65 bikes need to be sold

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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