# 3 40 points Water Supplies Department tests the drinking .pdf

A

3. (40 points) Water Supplies Department tests the drinking water of homeowners for contaminants such as zinc and iron. The zinc and iron levels in water specimens collected for a sample of 11 residents are shown in the following table. Assume that both zinc and iron levels in water specimens are normally distributed. (a) Construct a 99% confidence interval for the mean zinc level in water specimens.(b) Suppose that population standard deviation of iron level is 0.24 mg/L. i. Construct a 95% confidence interval for the mean iron level in water specimens.ii. For quality control purposes, we wish to estimate the mean iron level in water specimens to be within 0.025mg/L of its true value with a 98% confidence interval. What sample size should be used?(d) How many additional samples are required to ensure that, with 0.98 probaility, the absolute difference between the sample proportion for water specimens containing more than 0.30mg/L of iron and the population proportion for water specimens containing more than 0.30mg/L of iron is less than 0.01 ?(c) Develop an approximate 90% confidence interval for the proportion of water specimens containing more than 0.30mg/L of iron..

3 Consider two random variables X and Y whose relationship .pdf von
3 Consider two random variables X and Y whose relationship .pdfacutekcorp
3 views1 Folie
3 Consider two periodic tasks with computation times C11C.pdf von
3 Consider two periodic tasks with computation times C11C.pdfacutekcorp
3 views1 Folie
3 Consider a random variable X with the below probability m.pdf von
3 Consider a random variable X with the below probability m.pdfacutekcorp
3 views1 Folie
3 Alice and Bob buy a bag of apples which contains 10 good.pdf von
3 Alice and Bob buy a bag of apples which contains 10 good.pdfacutekcorp
2 views1 Folie
3 Consider a stochastic process Xt governed by the equation.pdf von
3 Consider a stochastic process Xt governed by the equation.pdfacutekcorp
2 views1 Folie
3 Compute insample forecasts of the monthly return data u.pdf von
3 Compute insample forecasts of the monthly return data u.pdfacutekcorp
3 views1 Folie

## Más de acutekcorp

3 Calculate the geostrophic wind at an altitude of 95km a.pdf von
3 Calculate the geostrophic wind at an altitude of 95km a.pdfacutekcorp
2 views1 Folie
3 Calculate the Following and Explain their significance .pdf von
3 Calculate the Following and Explain their significance .pdfacutekcorp
2 views1 Folie
3 Based on the tracing of current below measured through a .pdf von
3 Based on the tracing of current below measured through a .pdfacutekcorp
3 views1 Folie
3 Bees Buttermilk Corporation seleccin de proveedores Bas.pdf von
3 Bees Buttermilk Corporation seleccin de proveedores Bas.pdfacutekcorp
6 views1 Folie
3 An astronomer takes 100 independent measurements X1X2.pdf von
3 An astronomer takes 100 independent measurements X1X2.pdfacutekcorp
3 views1 Folie
3 An application of the sampling distribution of the sample.pdf von
3 An application of the sampling distribution of the sample.pdfacutekcorp
8 views1 Folie

### Más de acutekcorp(20)

3 Calculate the geostrophic wind at an altitude of 95km a.pdf von acutekcorp
3 Calculate the geostrophic wind at an altitude of 95km a.pdf
acutekcorp2 views
3 Calculate the Following and Explain their significance .pdf von acutekcorp
3 Calculate the Following and Explain their significance .pdf
acutekcorp2 views
3 Based on the tracing of current below measured through a .pdf von acutekcorp
3 Based on the tracing of current below measured through a .pdf
acutekcorp3 views
3 Bees Buttermilk Corporation seleccin de proveedores Bas.pdf von acutekcorp
3 Bees Buttermilk Corporation seleccin de proveedores Bas.pdf
acutekcorp6 views
3 An astronomer takes 100 independent measurements X1X2.pdf von acutekcorp
3 An astronomer takes 100 independent measurements X1X2.pdf
acutekcorp3 views
3 An application of the sampling distribution of the sample.pdf von acutekcorp
3 An application of the sampling distribution of the sample.pdf
acutekcorp8 views
3 According to HealthyChildorg 4 Missing two days a month.pdf von acutekcorp
3 According to HealthyChildorg 4 Missing two days a month.pdf
acutekcorp2 views
3 Al comentar sobre el desempeo decepcionante de The Great.pdf von acutekcorp
3 Al comentar sobre el desempeo decepcionante de The Great.pdf
acutekcorp3 views
3 According to a company news release during the third qua.pdf von acutekcorp
3 According to a company news release during the third qua.pdf
acutekcorp2 views
3 Aadakilerden hangisi azalan marjinal kontrol yasasn tanml.pdf von acutekcorp
3 Aadakilerden hangisi azalan marjinal kontrol yasasn tanml.pdf
acutekcorp2 views
3 A perfectly competitive firm has the following total cost.pdf von acutekcorp
3 A perfectly competitive firm has the following total cost.pdf
acutekcorp2 views
3 A recent study done on college students found that the me.pdf von acutekcorp
3 A recent study done on college students found that the me.pdf
acutekcorp2 views
3 A large sample of human males was screened for the freque.pdf von acutekcorp
3 A large sample of human males was screened for the freque.pdf
acutekcorp2 views
3 A machine learning model is trained to predict whether a .pdf von acutekcorp
3 A machine learning model is trained to predict whether a .pdf
acutekcorp8 views
3 a Fill in the blanks for the relative percentage of base.pdf von acutekcorp
3 a Fill in the blanks for the relative percentage of base.pdf
acutekcorp2 views
3 A firm is organized as a 2person partnership Each worke.pdf von acutekcorp
3 A firm is organized as a 2person partnership Each worke.pdf
acutekcorp5 views
3 a Consider the selfattention operation SX defined as.pdf von acutekcorp
3 a Consider the selfattention operation SX defined as.pdf
acutekcorp7 views
acutekcorp3 views
3 5 points Refer to the following worksheet The followin.pdf von acutekcorp
3 5 points Refer to the following worksheet The followin.pdf
acutekcorp2 views
3 a 2 pts For XPois find EX the average factoria.pdf von acutekcorp
3 a 2 pts For XPois find EX the average factoria.pdf
acutekcorp2 views

## Último

Collective Bargaining and Understanding a Teacher Contract(16793704.1).pptx von
Collective Bargaining and Understanding a Teacher Contract(16793704.1).pptxCenter for Integrated Training & Education
101 views57 Folien
INT-244 Topic 6b Confucianism von
INT-244 Topic 6b ConfucianismS Meyer
44 views77 Folien
MercerJesse2.1Doc.pdf von
MercerJesse2.1Doc.pdfjessemercerail
301 views5 Folien
Education of marginalized and socially disadvantages segments.pptx von
Education of marginalized and socially disadvantages segments.pptxGarimaBhati5
40 views36 Folien
SURGICAL MANAGEMENT OF CERVICAL CANCER DR. NN CHAVAN 28102023.pptx von
SURGICAL MANAGEMENT OF CERVICAL CANCER DR. NN CHAVAN 28102023.pptxNiranjan Chavan
43 views54 Folien
Career Building in AI - Technologies, Trends and Opportunities von
Career Building in AI - Technologies, Trends and OpportunitiesWebStackAcademy
41 views44 Folien

### Último(20)

INT-244 Topic 6b Confucianism von S Meyer
INT-244 Topic 6b Confucianism
S Meyer44 views
Education of marginalized and socially disadvantages segments.pptx von GarimaBhati5
Education of marginalized and socially disadvantages segments.pptx
GarimaBhati540 views
SURGICAL MANAGEMENT OF CERVICAL CANCER DR. NN CHAVAN 28102023.pptx von Niranjan Chavan
SURGICAL MANAGEMENT OF CERVICAL CANCER DR. NN CHAVAN 28102023.pptx
Niranjan Chavan43 views
Career Building in AI - Technologies, Trends and Opportunities von WebStackAcademy
Career Building in AI - Technologies, Trends and Opportunities
ANGULARJS.pdf von ArthyR3
ANGULARJS.pdf
ArthyR349 views
Create a Structure in VBNet.pptx von Breach_P
Create a Structure in VBNet.pptx
Breach_P82 views
Parts of Speech (1).pptx von mhkpreet001
Parts of Speech (1).pptx
mhkpreet00143 views
Narration lesson plan von TARIQ KHAN
Narration lesson plan
TARIQ KHAN69 views
JQUERY.pdf von ArthyR3
JQUERY.pdf
ArthyR3103 views
Guidelines & Identification of Early Sepsis DR. NN CHAVAN 02122023.pptx von Niranjan Chavan
Guidelines & Identification of Early Sepsis DR. NN CHAVAN 02122023.pptx
Niranjan Chavan38 views
12.5.23 Poverty and Precarity.pptx von mary850239
12.5.23 Poverty and Precarity.pptx
mary850239162 views
11.28.23 Social Capital and Social Exclusion.pptx von mary850239
11.28.23 Social Capital and Social Exclusion.pptx
mary850239409 views
Guess Papers ADC 1, Karachi University von Khalid Aziz
Guess Papers ADC 1, Karachi University
Khalid Aziz83 views

### 3 40 points Water Supplies Department tests the drinking .pdf

• 1. 3. (40 points) Water Supplies Department tests the drinking water of homeowners for contaminants such as zinc and iron. The zinc and iron levels in water specimens collected for a sample of 11 residents are shown in the following table. Assume that both zinc and iron levels in water specimens are normally distributed. (a) Construct a 99% confidence interval for the mean zinc level in water specimens.(b) Suppose that population standard deviation of iron level is 0.24 mg/L. i. Construct a 95% confidence interval for the mean iron level in water specimens.ii. For quality control purposes, we wish to estimate the mean iron level in water specimens to be within 0.025mg/L of its true value with a 98% confidence interval. What sample size should be used?(d) How many additional samples are required to ensure that, with 0.98 probaility, the absolute difference between the sample proportion for water specimens containing more than 0.30mg/L of iron and the population proportion for water specimens containing more than 0.30mg/L of iron is less than 0.01 ?(c) Develop an approximate 90% confidence interval for the proportion of water specimens containing more than 0.30mg/L of iron.
Aktuelle SpracheEnglish
Español
Portugues
Français
Deutsche