actividad 2
docx
keyboard_arrow_up
School
Sistema Universitario Ana G Mendez *
*We aren’t endorsed by this school
Course
202
Subject
Statistics
Date
Jun 6, 2024
Type
docx
Pages
4
Uploaded by CoachOysterMaster598
MODULO 5
Actividad 2
Keishlany Caraballo
Universidad Ana G. Méndez
STAT 300
05/04/2024
MODULO 5
Actividad 1.
1.Se toma una muestra de 49 observaciones de una población
normal con una desviación estándar de 10. La media de la muestra es de 55. Determine el intervalo de confianza de 99% de la media poblacional. Muestra-49 Desviación estándar-10 Media-55 Z-99% Negativo =55-2.575*6/√49 =55-
2.575* 6/7 =55-2.575*0.86 =55-22.1 =32.9 Positivo =55+2.575* 6/√49 =55+2.575* 6/7 =55+2.575*0.86 =55+22.1 =77.1 El 99% de la media de una población normal
esta entre un 32.9 y 77.1.
2.
Una empresa de investigación llevó a cabo una encuesta para
determinar la cantidad media que los fumadores gastan en cigarrillos durante una semana. La empresa descubrió que la distribución de cantidades que gastan por semana tendía a seguir una distribución normal, con una desviación estándar de $5. Una muestra de 49 fumadores reveló que la media de gastos semanales era de $40. ¿Cuál es el estimador puntual de la media de la población? Explique su respuesta. Con el nivel de confianza de 95%, determine el intervalo de confianza de la media poblacional. Explique su significado.
Limite superior del intervalo: 21,84
Limite inferior del intervalo:18,16
Explicación:
Limite superior del intervalo: 655.93
Limite inferior del intervalo: 601.67
Explicación paso a paso:
MODULO 5
Intervalo de confianza
Datos:
μ = $20
σ = $5
n= 49
Nivel de confianza 99%
Nivel de significancia α= 1-0,99 = 0,01
Zα/2= 0,01/2 =0,005 = -2,58 según la tabla de distribución Normal
Intervalo de confianza:
(μ)99% = μ ± Zα/2 * σ /√n
(μ )99% =20± 2,58*5/√49
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
MODULO 5
(μ)99% =20 ±1,84
Limite superior del intervalo: 21,84
Limite inferior del intervalo:18,16
3.
Una empresa que se dedica al cuidado de envejecientes contempla ofrecer de forma conjunta servicio de cuido de niños para sus empleados. Como parte del estudio de viabilidad del proyecto, desean calcular el costo medio semanal por el cuidado de los niños. Una muestra de 10 empleados que recurren este servicio revela las siguientes cantidades gastadas la semana pasada. 100, 107, 90, 97, 92, 105, 101, 91, 99, 104. Construya el intervalo de confianza de 90% de la media poblacional. Interprete el resultado.
Tenemos los gastos de los empleados:107 92 97 95 105 101 91 99 95 104Media = 107+92+97+95+105+101+91+99+95+104 /10Media = 98,6.Desviación estándar = √∑ (X -μ) ²/n = √234,12/10 = 4,8μ = 98,6σ= 4,8n = 10Confianza 90% = 0,90α = 1-0.90 = 0.1Zα/2 = 0.1/2 = 0.05 = 0.51994[μ]1-α = μ +- Zα/2 σ/√n: [μ]90% = 98.6 +- 0.52* 4.8/√10: [μ]90% = 98.6 +- 0.79: [μ]90% =97.81Por lo tanto, el costo medio semanal por el cuidado de niños es de 97.81
Related Questions
7. arctan
arrow_forward
0.
A par
arrow_forward
work
6IX
https://cdsb.elearningontario.ca/content/enforced/21909745-BL_2223Sem1_MAT_MHF4UU-948314,1 ELO/MHF4U 2011PU02/MHF4U 2011PU02A
pe here to search
sta
260%
HO
InveSign
8%20Assignment.pdf?ou 21909745
Question 5.
A home computer costs $9/year in electricity costs. If a new computer costs $2000
to purchase and lasts for 5 years, find the following:
O Et
Mic
a) Determine the total annual cost for this computer. Make sure you include the
cost of the electricity, and remember you have the computer for 5 years.
c) Sketch the graph of the function you have developed in (b).
b) Determine a function that gives the annual cost of a computer as a function of
the number of years you own the computer.
d) What are the asymptotes for this function and what do they mean in the
context of the problem? Is this realistic?
Des
+
a L
मे
17°C Sunny 1440 ENG
arrow_forward
si los elementos de una sustraccion suman1554 y la diferencia es la sexta parte del sutraendo.Hallar la diferencia
arrow_forward
initel Vehie Pidblem
(生ニ3)
arrow_forward
10.de
arrow_forward
What is the best estimate for
2,500 + 6?
A. 600
B. 400
C. 800
D. 200
400
62,500
-25
240.010
ght © by Savvas Learning Company LLC. All Rights Reser
arrow_forward
Help
arrow_forward
Round 8.24 to the nearest tenth.
xplanation
Check
arrow_forward
Explain how you decided where to place the decimal in quotients for (a),(b) and (c).
arrow_forward
What is the lenght of line segment of TS
arrow_forward
This solutiom is incorrect, please re-calculate ASAP
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you

Mathematics For Machine Technology
Advanced Math
ISBN:9781337798310
Author:Peterson, John.
Publisher:Cengage Learning,
Related Questions
- 7. arctanarrow_forward0. A pararrow_forwardwork 6IX https://cdsb.elearningontario.ca/content/enforced/21909745-BL_2223Sem1_MAT_MHF4UU-948314,1 ELO/MHF4U 2011PU02/MHF4U 2011PU02A pe here to search sta 260% HO InveSign 8%20Assignment.pdf?ou 21909745 Question 5. A home computer costs $9/year in electricity costs. If a new computer costs $2000 to purchase and lasts for 5 years, find the following: O Et Mic a) Determine the total annual cost for this computer. Make sure you include the cost of the electricity, and remember you have the computer for 5 years. c) Sketch the graph of the function you have developed in (b). b) Determine a function that gives the annual cost of a computer as a function of the number of years you own the computer. d) What are the asymptotes for this function and what do they mean in the context of the problem? Is this realistic? Des + a L मे 17°C Sunny 1440 ENGarrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Mathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,

Mathematics For Machine Technology
Advanced Math
ISBN:9781337798310
Author:Peterson, John.
Publisher:Cengage Learning,