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A random sample of 540 households from a certain mid-western city was selected, and it was...
A random sample of 526 households from a certain mid-western city was selected, and it was...
A random sample of 526 households from a certain mid-western city was selected, and it was determined that 136 of these households owned at least one firearm. Using a 99% confidence level, calculate a lower confidence bound for the proportion of all households in this city that own at least one firearm. (Give your answer to 3 decimal places.) 0.209 X You may need to use the appropriate table in the Appendix of Tables to answer this question Need Help?...
A. You selected a simple random sample of 225 households from a city. In this sample...
A. You selected a simple random sample of 225 households from a city. In this sample of 225 households, 81 households subscribe to Netflix. Let π denote the proportion of households in this city who subscribe to Netflix. Construct a 99% confidence interval for π. (Show work) B. A city has 50,000 households. You have drawn a simple random sample of 400 households from this city. In this sample of 400 households, 60 households own hybrid vehicles. At a 99%...
QUESTION 618points). A study conducted in Akhour city for the estimation of the proportion of households that contain at least one member over 65 years of age. Assume that the city has 621 a. If...
QUESTION 618points). A study conducted in Akhour city for the estimation of the proportion of households that contain at least one member over 65 years of age. Assume that the city has 621 a. If 11 households contained at least one member over 65 years of age, estimate the true b. How large a sample should be taken in order to estimate the population proportion with a households. A sample of 60 households was selected at random. population proportion and...
According to a certain study, of all the households in a city that owned at least...
According to a certain study, of all the households in a city that owned at least one laptop computer, 85% has two or more laptop computers. An internet provider planning to promote a new internet service package found that out of the 400 randomly selected households visited, 310 had two or more laptop computers. At the 0.05 level of significance, is there sufficient evidence to conclude that the proportion is less than what was reported? Express numerical answers in two...
In a random sample of 100 homes in a certain city, it is found that 10...
In a random sample of 100 homes in a certain city, it is found that 10 are heated by oil. (a) Find a 92% confidence interval for the true proportion of homes in the city that are heated with oil. (b) How large would the sample have to be in order to have a standard error that is 0.003 or lower?
A random sample of n = 214 people who live in a city were selected and...
A random sample of n = 214 people who live in a city were selected and 80 identified as a "dog person." A random sample of n2 = 119 people who live in a rural area were selected and 69 identified as a "dog person." Find the 99% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area...
1. A random sample of n measurements was selected from a population with standard deviation σ=13.6...
1. A random sample of n measurements was selected from a population with standard deviation σ=13.6 and unknown mean μ. Calculate a 90 % confidence interval for μ for each of the following situations: (a) n=45, x¯¯¯=89.8 ≤μ≤ (b) n=70, x¯¯¯=89.8 ≤μ≤ (c) n=100, x¯¯¯=89.8 ≤μ≤ (d) In general, we can say that for the same confidence level, increasing the sample size the margin of error (width) of the confidence interval. (Enter: ''DECREASES'', ''DOES NOT CHANGE'' or ''INCREASES'', without the...
Suppose that a simple random sample of 145, 91 said they drink coffee in the morning....
Suppose that a simple random sample of 145, 91 said they drink coffee in the morning. Step 1 of 5: What is the sample proportion for people who drink coffee in the morning? Step 2 of 5: Do we have what we need to compute a confidence interval? Yes, it's binomial. Yes, n≥30. Yes, we have a simple random sample, it is binomial with n/.05 gives a value less than the number of people than that in the world, and...
Suppose that a random sample of ten recently sold houses in a certain city has a...
Suppose that a random sample of ten recently sold houses in a certain city has a mean sales price of $295,000, with a standard deviation of $14,000. Under the assumption that house prices are normally_distributed, find a 99% confidence interval for the mean sales price of all houses in this community. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to the nearest whole number. (If necessary, consult a list of...
Suppose that a random sample of nineteen recently sold houses in a certain city has a...
Suppose that a random sample of nineteen recently sold houses in a certain city has a mean sales price of $290,000, with a standard deviation of $13,000. Under the assumption that house prices are normally distributed, find a 90% confidence interval for the mean sales price of all houses in this community. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to the nearest whole number. (If necessary, consult a list...
A random sample of 526 households from a certain mid-western city was selected, and it was determined that 136 of these households owned at least one firearm. Using a 99% confidence level, calculate a lower confidence bound for the proportion of all households in this city that own at least one firearm. (Give your answer to 3 decimal places.) 0.209 X You may need to use the appropriate table in the Appendix of Tables to answer this question Need Help?...
QUESTION 618points). A study conducted in Akhour city for the estimation of the proportion of households that contain at least one member over 65 years of age. Assume that the city has 621 a. If 11 households contained at least one member over 65 years of age, estimate the true b. How large a sample should be taken in order to estimate the population proportion with a households. A sample of 60 households was selected at random. population proportion and...
A random sample of n = 214 people who live in a city were selected and 80 identified as a "dog person." A random sample of n2 = 119 people who live in a rural area were selected and 69 identified as a "dog person." Find the 99% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area...
Suppose that a random sample of ten recently sold houses in a certain city has a mean sales price of $295,000, with a standard deviation of $14,000. Under the assumption that house prices are normally_distributed, find a 99% confidence interval for the mean sales price of all houses in this community. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to the nearest whole number. (If necessary, consult a list of...
Suppose that a random sample of nineteen recently sold houses in a certain city has a mean sales price of $290,000, with a standard deviation of $13,000. Under the assumption that house prices are normally distributed, find a 90% confidence interval for the mean sales price of all houses in this community. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to the nearest whole number. (If necessary, consult a list...
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