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katrin [286]
3 years ago
10

Lance rolls a die 5 times. What is the probability that he rolls an even number all five times?

Mathematics
2 answers:
dusya [7]3 years ago
8 0
If it is a six-sided dice, then the probability would be about an 8% chance.
Helga [31]3 years ago
8 0

Lance rolls a die 5 times

In a six sided dice, the even numbers are 2, 4  and 6. So 3 even numbers

the probability that he rolls an even number = \frac{3}{6} = \frac{1}{2}

the probability that he rolls an even number all five times

= \frac{1}{2} *\frac{1}{2} * \frac{1}{2} * \frac{1}{2} * \frac{1}{2}= \frac{1}{32}

So answer is \frac{1}{32}


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A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced.
zzz [600]

Answer:

CI=(66.54,78.46)                                  

Step-by-step explanation:

Given : A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed.

To find : A 99% confidence interval for the mean yield when the new catalyst is used ?

Solution :

Let X be the yield of the batches.

We have given, n=10 , \bar{X}=72.5\% , s=5.8%

Since the size of the sample is small.

We will use the student's t statistic to construct a 995 confidence interval.

\bar X\pm t_{n-1,\frac{\alpha}{2}}\frac{s}{\sqrt n}

From the t-table with 9 degree of freedom for \frac{\alpha}{2}=0.005

t_{n-1,\frac{\alpha}{2}}=t_{9,0.005}

t_{n-1,\frac{\alpha}{2}}=3.250

The 99% confidence interval is given by,

CI=72.5 \pm 3.25\frac{5.8}{\sqrt{10}}

CI=72.5 \pm 5.96

CI=(72.5+5.96),(72.5-5.96)

CI=(66.54,78.46)

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3 years ago
(50 POINTS AND BRAINLIEST!)
topjm [15]

Answer:

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4 years ago
What multiplication expression can you use to solve 2 divided by 8 4/5?
valina [46]
2*(5/44)

Dividing fractions means take the reciprocal of the second fraction then multiply
Find the reciprocal of 8 4/5
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Then multiply by 2
8 0
3 years ago
Jay went on a diet and lost 5 pounds each month. Find Jay's net weight change in 6 months.
Goryan [66]

Answer:

a 30 pound weight change in 1 month

Step-by-step explanation:

5 pounds

--------------- times 6 months  results in a 30 pound weight change in 1 month

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7 0
3 years ago
What is the value of the expression 8 cubed?
Ierofanga [76]

Answer:

512

Step-by-step explanation:

8*8*8

64*8

512

5 0
3 years ago
Read 2 more answers
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