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andreev551 [17]
3 years ago
9

I will mark brainliest please help me on this question! ​​

Mathematics
1 answer:
Alex3 years ago
7 0

B. The data set is skewed to the left.

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Is it likely that the next 50 Sunday customers will spend an average of at least​ $40? Explain. Choose the correct answer below​
Brrunno [24]

Answer:

B. Yes it is likely. The probability that the next 50 Sunday customers will spend an average of at least​ $40 is P=0.0023.

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>A grocery store’s receipts show that Sunday customer purchases have a skewed distribution with a mean of $32 and a standard deviation of $20.</em>

We have to assume certain conditions to calculate the probability that the next 50 Sunday customers will spend an average of at least​ $40.

First, this 50 purchases are representative of the total purchases made in the store (the same as saying it is a random sample).

Second, the 10% condition: the 50 sales represent less than 10% of all purchases.

Third, the sample of 50 sales is large enough to make an approximation to the normal distribution.

If all these conditions are met, we can approximate the probabiltity that the next 50 Sunday customers will spend an average of at least​ $40.

We have a sampling distribution, with mean 32 (equal to the population mean) and standard deviation:

\sigma_M=\dfrac{20}{\sqrt{50}}=\dfrac{20}{7.07}=2.83

Then, we calculate the z-score

z=\dfrac{X-\mu_M}{\sigma_M}=\dfrac{40-32}{2.83}=\frac{8}{2.83} =2.83

The probabilty can be calculated then as:

P(X_{50}>40)=P(z>2.83)=0.0023

5 0
3 years ago
Find the value of 6x+8 and 4x+2 that will make L||M<br><br>Please Help
Mariana [72]

Answer:

Step-by-step explanation:

6x+8=4x+2

2x=-6

x=-3

they both are -10=-10

7 0
3 years ago
Anyone wanna help me?
spayn [35]
Similarities: same atomic number
Differences: they have a different number of neutrons
8 0
3 years ago
Read 2 more answers
H/52 = 88/44 what does H=
loris [4]
I believe the answer is 104.
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3 years ago
How long should an escalator be if it is to make an angle 30 with the floor and
Charra [1.4K]

Answer:

it should be 23 feet long

Step-by-step explanation:

7 0
2 years ago
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