A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s=17.6 based on earlier​ studies? Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size​ required?   A​ 99% confidence level requires______subjects

Q: A survey of women who are the main meal preparers in their households reported that 80% know that…

A: From the provided information, A survey of women who are the main meal preparers in their households…

Q: our boss agreed to your process improvement project and after several months, you think that waste…

A: A sample of the food waste generated over the next 10 weeks was taken and the following data was…

Q: Suppose we have two normal populations denoted A and B, and we want to compare their population…

A: Let the sample variance of A be SA2, the according to question the variance of B will be…

Q: You sample 36 families to find out how much they spent on groceries last month. Your sample mean is…

A: Given data,n=36x=540s=82α=0.05

Q: Obesity Obesity is defined as a body mass index (BMI) of 30 kg/m" or more. A 99% confidence interval…

A: The given confidence interval is 19.5% to 21.7%.We have to construct 99% confidence interval.This is…

Q: Choose a quantitative variable.  Measure it on two different samples of 10, drawn from two different…

A:

Q: If n = 560 and X = 448, construct a 95% confidence interval for the population proportion, p. %3D…

A:

Q: Suppose we are interested to construct a confidence interval at 95% confidence level of the mean…

A: The provided information is  α=0.05 The critical value is  zc=1.96  (from standard normal table) The…

Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

Q: Please answer the question in the photo. Please explain. Thank you

A:

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: The formula of to estimate sample size is, n=zα2sE2

Q: As part of a water quality survey, you test the water hardness in several randomly selected streams.…

A:

Q: A doctor wants to estimate the HDL cholesterol of all 20 to 29 year old females. how many subjects…

A: (a) A 99% confidence level requires158 subjects

Q: People were polled on how many books they read the previous year. Initial survey results indicate…

A: The formula of the sample size is,where, denotes the critical value of Z denotes the population…

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 99%…

A:

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: Solution: The confidence interval for the population mean is calculated by using the following…

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: Sample size for 99% confidence level: It is given that the standard deviation is 18.4. Margin of…

Q: Given sensitivity is 0.88, specificity is 0.95, and prevalence is 0.07, find the positive predictive…

A: It is required to find the positive predictive value, and negative predictive value, using…

Q: A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements…

A: Given data: Before After 10.2 6.9 7.3 2.9 9.7 7.2 11.4 8.6 11.1 8.4 9.5 6.4 4.1…

Q: B. Construct a 95% confidence interval estimate of 4-4, the difference between the mean weight of…

A: Given Information: B) 95% confidence interval estimate of difference between the mean weight of…

Q: Sales of trumpets in a day is modeled as Normal. A random sample of 36 days is looked at. The sample…

A:

Q: doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A:

Q: “Over 24 weeks, systolic blood pressure in the low-carbohydrate diet group decreased by 9.6 mm Hg…

A: Confidence interval is an estimation technique is statistics.

Q: Which one of these is the best interpretation of the 80% confidence level for the mean sugar col of…

A: It is given that the confidence interval is 17.9mm and 27.1 mm.

Q: People were polled on how many books they read the previous year. Initial survey results indicate…

A:

Q: Think about a population mean that you may be interested in and propose a confidence interval…

A: Given sample, 2, 0, 1, 5, 0, 2, and 3. To estimate the confidence interval for a population mean we…

Q: Using the .05 level of significance, which of the following findings is statistically significant?…

A: Using the .05 level of significance,

Q: We want to determine if the true proportion of students who do aerobics is less than 45%. Which are…

A: Suppose P is the true proportion of students who do aerobics.

Q: The p-value to test if Education is a significant predictor (previous question) is approximately 0…

A: From the given information, the p-value to test if Education is a significant predicator is about 0.

Q: to survive a heart attack, the researchers reported the ages of the two groups they examined. The…

A: Given: Without cardiac disease Sample size n1=2397Sample mean x¯1=69.8Sample standard deviation s…

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A:

Q: Obesity Obesity is defined as a body mass index (BMI) of 30 kg/m or more. A 99 % confidence interval…

A: From the provided information, Confidence level = 99% Confidence interval = (0.253, 0.271)

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: A sample of 1100 observations taken from a population produced a sample proportion of 0.36 . Make a…

A: Given information Sample proportion = 0.36 Sample size (n) = 1100

Q: QUESTION 10 A confidence interval was found to be (2.4, 7.9). What was the point estimate? OA. 5.5…

A: CI is (2.4,7.9) Point estimate= ?

Q: Suppose you wanted to estimate the difference between two population means correct to within 4 at…

A: Given data, E=4 z-value at 91% confidence is Zc= 1.70 σ2=15.5σ=3.937n=?

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: If the sample size increases, then the standard error of statistic decreases. The margin of error is…

Q: A teacher administers a standardized math .4 test to his class of 75 students. the mean score (out…

A: Here's, mean is 235 and standard deviation is 28. Sample number is 75. We will use one sample…

Q: Obesity Obesity is defined as a body mass index (BMI) of 30 kg/m2 or more. A 99% confidence…

A: See the handwritten solution

Q: What is the meaning of a confidence interval? Your answer should clearly distinguish between the…

A: For the provided information the followings are inferred. For the considered set of 5 replicate…

Q: Suppose you have 86 samples with sample standard deviation 4.7. A 99% confidence interval for the…

A: The sample size is 86, and the sample standard deviation is 4.7. The degrees of freedom is,…

Q: You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of…

A: The data shows the hours of sleep for 12 subjects.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.