Hey! please help i’ll give brainliest

The life in hours of a biomedical device under development in the laboratory is known to be approximately normally distributed.

Anton [14]

Answer:

a) The evidence suggest the true mean life of a biomedical device > 5500

b) (5487.94, +∞)

c) There is evidence to support that the mean is equal to 5500

Step-by-step explanation:

Here we have

(a) To test the hypothesis we have the claim that the mean life of biomedical devices > 5500

Therefore, we put the null Hypothesis which is the proposition that a difference does not exist. That is

H₀: μ = 5500

Therefore, the alternative hypothesis will be

Hₐ: μ > 5500

The test statistic is then found by;

$t=\frac{\bar{x}-\mu }{\frac{s }{\sqrt{n}}} =\frac{5617.8-5500 }{\frac{234.5 }{\sqrt{15}}} \approx 1.95$

The P value from the T table at df = n - 1 = 15 - 1 = 14 is

0.025 < P < 0.05

The P value is given as 0.036 from the T distribution at 14 derees of freedom df

Therefore, since P < α or 0.05, we reject the null hypothesis. That is we fail to reject Hₐ: μ > 5500. The evidence suggest the true mean life of a biomedical device > 5500

(b) The 95% confidence interval is given as

$CI=\bar{x}\pm t_\alpha \frac{s}{\sqrt{n}}$

Which gives t $_\alpha$ = $\pm$ 2.145

$CI=5617.8\pm 2.145 \times \frac{234.5}{\sqrt{15}}$

The confidence interval of the lower bound on the mean is then

(5487.94, +∞)

c) From the above result, we find that the mean of 5500 is contained in the range of the lower confidence on the mean. We can therefore, accept the null hypothesis. That is there is evidence to support that the mean is equal to 5500.

6 0

3 years ago

In a recent year, 22.7% of all registered doctors were female. If there were 43,800 female registered doctors that year, what wa

Elan Coil [88]

Answer:

sdf67566655 so x is 129

Step-by-step explanation:

ytr654564676

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2 years ago

Which expression represents the output when the input is m?

Tresset [83]

Uh can you show the problems? Because I wouldn’t be able to answer your question if you don’t show me the expressions

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2 years ago

Please write This homework in Informal letter

Roman55 [17]

Answer:

Dear (your friend name)

Hope you are doing well. I have joined my boarding school, and writing this letter as per your demand to tell my experience.

have joined my boarding school, and writing this letter as per your demand to tell my experience.I came here about two days back. The school is eco friendly with multicoloured flowers and a field full of greenery. My hostel rooms and classrooms, both are highly ventilated and sun-facing. During these summer times, we don't need an air conditioner at all.

have joined my boarding school, and writing this letter as per your demand to tell my experience.I came here about two days back. The school is eco friendly with multicoloured flowers and a field full of greenery. My hostel rooms and classrooms, both are highly ventilated and sun-facing. During these summer times, we don't need an air conditioner at all.My classmates are good and I made few friends as well. The same is for hostel roommates too. Food too is very delicious here. We have playing time and television time as well.

have joined my boarding school, and writing this letter as per your demand to tell my experience.I came here about two days back. The school is eco friendly with multicoloured flowers and a field full of greenery. My hostel rooms and classrooms, both are highly ventilated and sun-facing. During these summer times, we don't need an air conditioner at all.My classmates are good and I made few friends as well. The same is for hostel roommates too. Food too is very delicious here. We have playing time and television time as well.Here everyone is very disciplined and strict for their routine and studies. Overall the environment is very nice here. Do write about what's going with you.

Love

(JOE or Gabriel)

HOPE THIS HELPED

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Is 3x + 2y = 6 a function??

professor190 [17]

Answer:

B :)

Step-by-step explanation:

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