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Sindrei [870]
2 years ago
10

A spinner with 10 equally sized slices is shown below. (3 slices are blue, 2 are yellow, and 5 are rec the probability that the

dial stops on a blue or yellow slice? Write your answer as a fraction or a whole number.​
Mathematics
1 answer:
Ainat [17]2 years ago
5 0

Answer:

1/2

Step-by-step explanation:

Blue + yellow = 3 + 2   = 5     out of 10 slices

     5 out of 10   = 5/10 = 1/2

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A way to represent the block? choose yes or no 300 hundred 30 one 30 hunderd 30tens
elena-s [515]
Well 300 and 30 ones would be {330}   and 30 hundreds  and 30 tens would be 3,300 because 30 times 100 equals 3,000 and 30 times 10 equals 300.  Hope this helps :}
5 0
3 years ago
Elijah played in a golf tournament. For the first three days he averaged a score of -2. On the fourth day he shot a +2. What was
pogonyaev
-2, -2, -2, +2

-2 + -2 + -2 + 2
-2 -2 -2 + 2
-6 + 2
-4
-4/ 4 = -1

His average is -1
4 0
3 years ago
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Which is the factored form of 3y -18
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3 years ago
The sales of a grocery store had an average of $8,000 per day. The store introduced several advertising campaigns in order to in
oksano4ka [1.4K]

Answer:

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

p_v =P(Z>2)=0.0228  

Step-by-step explanation:

1) Data given and notation  

\bar X=8300 represent the sample mean  

\sigma=1200 represent the population standard deviation  

n=64 sample size  

\mu_o =800 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

2) State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is higher than 8000, the system of hypothesis are :  

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

3) Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

4) P-value  

Since is a one-side upper test the p value would given by:  

p_v =P(Z>2)=0.0228  

5) Conclusion  

If we compare the p value and the significance level assumed, for example \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the mean is significantly higher than $8000.  

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3 years ago
Plz help me with this word problem
Irina-Kira [14]
This is mathXL right I know it exactly
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3 years ago
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