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Alina [70]
2 years ago
15

A random sample has been taken from a population. A statistician, using this sample, needs to decide whether to construct a 90 p

ercent confidence interval for the population mean or a 95 percent confidence interval for the population mean. How will these intervals differ?
Mathematics
1 answer:
AURORKA [14]2 years ago
5 0

Answer:

Step-by-step explanation: a confidence interval is a range that shows how precise the measurement is. if a statistician decides to construct using 90 percent C I over a 95% C I, it tells you that you have 10% chance of being wrong rather than 5% chance of being wrong while using the 95%. Also a 90 percent confidence interval would be narrower than a 95 percent confidence interval

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The scatter plot shows the amount of sunlight some tomato plants received and the amount of each plant grew
Studentka2010 [4]

Answer:

Option D

Step-by-step explanation:

The complete question is attached herewith.

Also the options for the same are as follows -

What is the meaning of the slope of the trend line shown on the scatterplot?  

A A plant grows about 3 inches for every 2 hours of sunlight it receives.  

B A plant grows about 2 inches for every 3 hours of sunlight it receives.  

C A plant grows about 3 inches for every 1 hour of sunlight it receives.  

D A plant grows about 1 inch for every 3 hours of sunlight it receives.

Solution

If we look at the graph, we can see that in 6 hours the tomato plant grew by 2 inches.

At the X axis, when x = 6 hours, the y co-ordinate at X = 6 hours is 2 inches.

Hence, It can be interpreted that 1 inch of the tomato plant grows in 3 hours.

Hence, option D is correct

3 0
2 years ago
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icang [17]
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6 0
2 years ago
10 tan = ___pounds?
tensa zangetsu [6.8K]
(I'm guessing you mean ton)
10 ton = 20,000 pounds
8 0
3 years ago
Read 2 more answers
What is normal, when it comes to people's body temperature? a random sample of 130 human body temperatures, provided by allen sh
nikitadnepr [17]
The two-sided alternative hypothesis is appropriate in this case, the reason being we are asked "does the data indicate that the average body temperature for healthy humans is different from 98.6◦........?".
The test statistic is:
Z= \frac{\bar{X}-\mu}{ \frac{s}{ \sqrt{n} } }} =-5.47
Using an inverse normal table, and halving \alpha for a two-tailed test, we look up p=0.5-\alpha/2=0.5-0.005=0.495 and find the critical value to be Z = 2.5758.
Comparing the test statistic Z = -5.47 with the rejection region Z < -2.5758 and Z > 2.5758. we find the test statistic lies in the rejection region. Therefore the evidence does not indicate that the average body temperature for healthy humans is different from 98.6◦.
 
7 0
2 years ago
Can anyone good with math help? ( please don't answer if you don't know thank you)​
Mademuasel [1]

Answer:

y= (x+4)(x+4) is the answer

Step-by-step explanation:

Identity used= (a+b)²= a²+2ab+b²

6 0
2 years ago
Read 2 more answers
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