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slavikrds [6]
3 years ago
13

Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 24 laboratory

rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8. Which of the following would cause the most worry about the validity of this interval?
(a) There is a clear outlier in the data.
(b) A stemplot of the data shows a mild right skew.
(c) You do not know the population standard deviationσ.
(d) The population distribution is not exactly Normal.
(e) None of these are a problem when using a t interval.
Mathematics
1 answer:
Ludmilka [50]3 years ago
6 0

Answer: (a) There is a clear outlier in the data.

Step-by-step explanation:

The statement relates that sample= 24

Confidence interval= 80.2 to 89.8.

Now the data does not mention anywhere the standard deviation which is an important parameter in using the t-procedure rather we assume that standard deviation is not known. So, the most worrying part is the skewness and the presence of strong outliers in the t-procedure.

So, the option a) is correct meaning a clear outlier in the data.

You might be interested in
I cant believe how bad my brother, Reuben, is at growing things. He bought a whole bunch of plants at the nursery the other day.
jeka94

Answer:

68 plants.

Step-by-step explanation:

Let x represent the number of plants that Reuben bought from the nursery.

We have been given that Reuben bought a whole bunch of plants at the nursery the other day. Right away, five died. So number of plant left would be x-5.

We are also told that then our dog dug up 2/9 of them. So number of plants left after dug-up would be \frac{2}{9}(x-5).

Further a rabbit came and ate ½ of what was left. So number of plants left would be \frac{\frac{2}{9}(x-5)}{2}=\frac{2}{9\times 2}(x-5)=\frac{1}{9}(x-5).

Since Reuben had only 7 plants left, so we will equate our expression with 7 and solve for x as:

\frac{1}{9}(x-5)=7

9\times \frac{1}{9}(x-5)=7\times 9

x-5=63

x-5+5=63+5

x=68

Therefore, Reuben bought 68 plants at the nursery.

6 0
3 years ago
Answer :)
slava [35]
1. -3
2. 28
3. 88
4. -5
5. -28
4 0
3 years ago
On a number line what is the distance between -12 and 20
djverab [1.8K]

Answer:

The distance is 32

Step-by-step explanation:

One way is to subtract -12 and 20, which equals 32.

Another way is to add 12 and 20 since distance on a number line is always positive, which equals 32.

7 0
3 years ago
Read 2 more answers
13 gallons is the same as how many liters?<br> Hint: 1 gal 3.8 L
I am Lyosha [343]

Answer:

49.4

Step-by-step explanation:

So, 1 Gallon = 3.8 Liters.  We need to find how many liters are in 13 gallons.

All we need to do is multiply our 3.8 liters (1 gallon) by 13 to find out how many  liters 13 gallons is.

3.8 x 13 = 49.4

Your answer is 49.4.

<u>Hope this helps and have a nice day!</u>

5 0
3 years ago
I need help with this
luda_lava [24]
The answer would be c. 3 (x+5) because you would add x and 5 to get the base of the rectangle then multiply it by the hight (3)
8 0
2 years ago
Read 2 more answers
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