1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
juin [17]
3 years ago
12

Suppose that the pages per book in a library are normally distributed with an unknown mean and standard deviation. The book leng

ths of 39 randomly sampled books are used to estimate the mean of the population. What t-score should be used to find the 99% confidence interval for the population mean?
Mathematics
1 answer:
Elanso [62]3 years ago
6 0

Answer:

A t-score of 2.0244 should be used to find the 99% confidence interval for the population mean

Step-by-step explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 39 - 1 = 38

Now, we have to find a value of T, which is found looking at the t table, with 38 degrees of freedom(y-axis) and a confidence level of 0.99(t_{99}). So we have T = 2.0244.

A t-score of 2.0244 should be used to find the 99% confidence interval for the population mean

You might be interested in
The specifications for the diameter of a molded part are 10 mm ± 0.5 mm. The actual average and standard deviation from 250 part
ad-work [718]

Answer: Capable

Step-by-step explanation: The capability of a process could be exaplained as a measure of the ability of a process to produce part within specified limits by making use of statistical measurement. In determining if a certain process is capable or not, the value of process capability (Cp) is measured, in most cases, a process is deemed capable by having a Cp value of 1.33 or higher.

Cp formula :

(Upper specification limit(USL) - Lower specification limit(LSL) ) / 6* standard deviations

Diameter = 10 mm ± 0.5 mm

Standard deviation = 0.1mm

USL = 10 + 0.5 = 10.5

LSL = 10 - 0.5 =. 9.5

Cp = (10.5 - 9.5) / 6*0.1

Cp = 1/0.6

Cp = 1.6666

Cp = 1.67

Hence, the process is capable

5 0
3 years ago
Which of the following terms best describes the set of all points in a plane for which the difference between the distances of a
Gnoma [55]

Answer:

HYPERBOLA

Step-by-step explanation:

We have the statement,

'The set of all points in a plane for which the difference between the distances of a given point to two fixed foci equals a certain constant'.

We know that,

Hyperbola is the set of points such that for point P anywhere on the curve, the absolute distance to the two fixed points is a constant.

i.e. From the figure, we see that, the difference of the distance of P from F_{1} and F_{2} is equal to constant 2a.

Thus, the term representing the given statement is HYPERBOLA.

6 0
3 years ago
1<br> _ x 5 Please explain<br><br><br> 4
Serhud [2]

Answer:

Step-by-step explanation:

25

7 0
2 years ago
If you where born in 1620 and died in 1730 how old where u before u died?<br><br><br> pls help ;-;
Tema [17]

To make it simple, just subtract the age that you died to the age that you were born.

1730 - 1620 = 110

Which means that you would die at the age of 110 if you were born at 1620 and died on 1730.

5 0
3 years ago
Read 2 more answers
15% of amount = 112.79
Mazyrski [523]
To find the original amount, you divide the product by the percentage. 

112.79 / 0.15 ≈ 751.933 (the 3's repeat infinitely). 

To check your answer, multiply 751.933 by 0.15. 
751.933 * 0.15 = 112.78995 ≈ 112.79
4 0
3 years ago
Read 2 more answers
Other questions:
  • tanner collected 360 cans and bottles, this was 40% of what Reggie collected, how many cans and bottles did Reggie collect
    5·2 answers
  • Siree wants to go surfing for one hour tomorrow. The height of the waves on a local beach can be approximated by the function H(
    9·1 answer
  • Given: 3x-2/2=5<br>Prove: x=4<br><br>Complete the proof.​
    11·1 answer
  • Which of the following options have the same value as 70%, percent of 80?
    5·1 answer
  • Vassil rounded to the nearest half to estimate the product of Five-eighths and StartFraction 8 over 9 EndFraction. How do the es
    12·2 answers
  • Each sales associate at an electronics store has a choice of the two salary options shown below. • $115 per week plus 9.5% commi
    5·1 answer
  • What is 36=6b — 6+b
    6·2 answers
  • AB and CD are common external tangents of R and S AB =15 SD=12 and SX=20 what is the measure of CX?​
    9·1 answer
  • Calli has 35 flowers and 7 vases. She wants to put the same number of flowers in
    5·1 answer
  • Write an equation that represents the line that passes through the points (– 2, – 3) and (−1, 2).
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!