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sergejj [24]
3 years ago
9

In a study of 82 Halo game players, it was found that the ages of these players were normally distributed, with a mean age of 17

years and a standard deviation of 3 years. Find the z score for a 21 year old.
A.) 2
B.) -2
C.) -1.33
D.) 1.33
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer:

c

Step-by-step explanation:

and bro i am i have a brother that always on my account makes me that im cheating that im not and he always blames me so thats why my bro has too many gfs and always blames me

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The scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches what is the actual distanc
DanielleElmas [232]

Answer:

4 3/8 miles

Step-by-step explanation:

We are told that: the scale on a map is 1 inch =2 1/2 miles.the distance between two streets on the map is 1 3/4 inches

If 1 inches = 2 1/2 miles

1 3/4 inches =

Cross Multiply

1 3/4 × 2 1/2/1

= 7/4 × 5/2

= 35/8

= 4 3/8 miles

The actual distance between these streets is 4 3/8 miles

7 0
4 years ago
Home Videos Inc. surveys 450 households and finds that the mean amount spent for renting or buying videos is P135 a month and th
adell [148]

SOLUTION:

Case: Hypothesis testing

Step 1: Null and Alternative hypotheses

\begin{gathered} H_0:\mu=P127.50 \\ H_1:\mu\leq P127.50 \end{gathered}

Step 2: T-test analysis

\begin{gathered} t=\frac{\hat{x}-\mu}{\frac{s}{\sqrt{n}}} \\ t=\frac{135-127.5}{\frac{75.25}{\sqrt{450}}} \\ t=2.144 \end{gathered}

Step 3: t-test with the significance level

\begin{gathered} t_{\alpha}=? \\ \alpha=0.05 \\ From\text{ }tables \\ t_{0.05}=1.654 \end{gathered}

Step 4: Comparing

t>t_{\alpha}

So tail to reject the null hypothesis. There is enough evidence at a 0.05 level of significance to claim that the mean spent is greater than P127.50.

Final answer:

Yes, there is evidence sufficient to conclude that the mean amount spent is greater than P127.50 per month at a 0.05 level of significance.

6 0
1 year ago
A health food store has launched a new pack of vitamins for children. The store records the number of packs ordered by a random
Andrew [12]

Answer:

online customers: slot 5

Walk in customers: slot 3

Step-by-step explanation:

4 0
3 years ago
Which of the following segments is a diameter of O? <br><br> A. UF <br> B. WM <br> C. WO <br> D. OF
pishuonlain [190]

Answer:

The answer to your question is letter A

Step-by-step explanation:

In the picture, we can observe that

UF is the diameter of the circle. Diameter is a line that reaches from one point on the edge of a circle, through its center, to a point on the opposite side.

WM is a secant or a chord

WO is the radius

OF is also a radius

4 0
3 years ago
Help and explain plzzz
user100 [1]
The answer is B. She sells each orange for $0.50 and the question is asking for the total amount of money she will make by selling a certain amount of oranges. t represents the total so the equation will to equal to t. c is the number of oranges she will sell so c multiplied by $0.50 will give the total amount of money she will make.
6 0
4 years ago
Read 2 more answers
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