After calculating the sample size needed to estimate a population proportion to within 0.05, you have been told that the maximum allowable error (E) must be reduced to just 0.025. If the original calculation led to a sample size of 1000, the sample size will now have to be___.

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and area. She will…

A: The smapleproprotion is caculated as: p = x/n=36/330 =0.1091   At a 95% confidence level, the z…

Q: Determine the sample size required to estimate a population proportion to within The numbers 0.032…

A: The margin of error is 0.032, confidence interval is 95%.

Q: Your investment executive claims that the average yearly rate of return on the stocks she recommends…

A:

Q: (e) You wish to test the null hypothesis Họ: µz 244 mg/100 ml against the alternative HA: µ<244…

A:

Q: For a particular population, a sample of n = 4 scores has a standard error of 6. For the same…

A: Given data,If n=4 then σx =6 If n=16 σx=?

Q: Suppose that the researchers wanted to estimate the proportion of patients under 50 years old who…

A: Givenpatients under 50 yearsx=15n=81p^=1581=0.185Margin of error(E)=0.03confidence level(c)=95%

Q: A random sample of size 32 is selected from population X, and a random sample of size 43 is selected…

A: Given :            Let X and Y be the two population Wheren1=32n2=43n1  and n2  be the sample size…

Q: Apply the Slovin’s formula to calculate the minimum sample size for a population of 3,658 when e =…

A: Given that Population size N = 3658 Margin of error e = 0.10

Q: According to a food website, the mean consumption of popcorn annually by Americans is 64 quarts. The…

A: The hypothesis is a statement about the population parameter.  A null hypothesis is a statistical…

Q: 1. A report in LTO stated that the average age of taxis in the Philippines is 9 years. An operation…

A:

Q: A developmental psychologist working in the area of suggestion asked a sample of children to solve…

A: Given data Problem Solving Time-filling 3 10 4 5 7 8 4 7 2 9…

Q: Which of the following options correctly described how to obtain the estimated standard error in a…

A: here use basic of t -test

Q: The Director of a medical hospital feels that her surgeons perform fewer operations per year than…

A: Given that,

Q: As noted on page 275, when the two population means are equal, the estimated standard error for the…

A: 1. Let the null hypothesis be H0: μ1=μ2. Let the sum of squares of the first sample be SS1=70. Let…

Q: medical researcher claims that the proportion of people taking a certain medication that develop…

A:

Q: Standard Error is a measure of how much the point estimate changes from sample to sample. The…

A: (a) Obtain the value of the standard error. The value of the standard error is obtained below as…

Q: In a hypothetical scenario, the National Institute of Standards and Technology has received a new…

A:

Q: d. How many member organizations need to be selected to have 95% confidence of estimating the…

A: d. A random sample of 100 member organizations is considered in which 40 members organizations have…

Q: proportion of people taking a certain medication that develop serious side effects is 12%. To test…

A:

Q: A random sample of  n= 4 individuals is selected from a population with μ = 35, and a treatment is…

A: a. A sample of 4 individuals is selected from a population with mean 35. The sample mean and sum of…

Q: Your screening facility can process 1,000 people per week. Assume you are attempting the early…

A: Please note that as per our company's guidelines if multiple sub-parts are there in a question we…

Q: In the t-test of significance for the hypotheses Ho: μ = 11 and Haμ 11, the value of the test…

A: The t test is the type of parametric test. It used to test the mean significance between the sample…

Q: (c) Suppose that the researchers wanted to estimate the proportion of patients under 50 years old…

A: Givenx=19n=356Margin of error(E)=0.03p^=xn=19356=0.0534Confidence interval = 95%

Q: Suppose a variable is Normally distributed with μ=345 and sigma σ=30. What proportion of the data…

A: Given Mean=345 Standard deviations=30

Q: A veterinary nutritionist developed a diet for overweight dogs. The total volume of food consumed…

A: Given Data :   Before After Difference = Before - After   42 39 3   53 45 8   48 40 8…

Q: Which of the following statements correctly describe estimation?   a. It is the process of…

A: Given that,   ESTIMATION: The answer is OPTION B. It is the process of inferring the values of…

Q: A medical researcher claims that the proportion of people taking a certain medication that develop…

A:

Q: sample proportion is calculated from a sample size of 201. How large of a sample would we need in…

A:

Q: given normally distributed sample x=12 and s=3, use the Empirical Rule determine the upper and lower…

A: According to the empirical rule,

Q: Suppose a new production method will be implemented if a hypothesis test supports the conclusion…

A: The claim is that the mean cost for the current production method is $280 per hour.

Q: In a random sample of size 42, 34 people say they generally get less than 8 hours of sleep a night.…

A: Given that the sample size is 42 and 34 people say they generally get less than 8 hours of sleep a…

Q: To see the effect of a relatively small error in the estimate of the amount of carbon-14 in a sample…

A: Let there were A0 amount of carbon initiallyIn the year 2000 contains 17% of its original carbon-14…

Q: Solve the problem. 9) A simple random sample of women aged 18–24 is selected, and the systolic blood…

A: Given problem Given that   A simple random sample of women aged 18-24 is selected, and the…

Q: |The drying time of a certain type of paint under specified test conditions is considered to be It…

A: As the population standard deviation is known, we will use z distribution. The null and alternative…

Q: The recommended dietary allowance (RDA) of vitamin C for women is 75 milligrams per day. A…

A:

Q: A recent survey amongst 240 randomly selected vendors in Durban showed that 84 of them felt that…

A: According central limit theorem, the sampling distribution of sample proportion follows the normal…

Q: what will the sample proportion (or ) be? Please compute this value below and round your answer to…

A: We have given that  favourable cases, X = 113 Sample size, n = 310 Sample proportion, p^ = X/n

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A: We have given that  Sample size n =116 Sample mean = 12.5  Standard deviation =6.35 Level of…

Q: Given two estimators X1 and X2 for a population mean, E[X1] = 6, V[X1] = 4, and V[X2] = 5. If the…

A:

Q: A. Determine the sample size required to estimate a population proportion to within 0.04 with 94.3%…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.943.

Q: A. Determine the sample size required to estimate a population proportion to within 0.04 with 97.8%…

A: Find z-critical value:…

Q: The united States ranks ninth in the world in per capita chocolate consumption; the aver- age…

A: The Null hypothesis H0: μ ≤  9.5. Alternative hypothesis H1: μ &gt;9.5 Since sample size is small…

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A: (1)   State the hypotheses.   (2) Obtain the value of the test statistic.. The value of the test…

Q: 1. A survey was conducted to determine whether educational background is related to teaching…

A:

Q: at an a = 0.01 level : O a. Fail to reject H0. There is sufficient evidence to conclude that the…

A: Given that: Sample size n =220 Level of significance =0.01 Test statistic z = - 2.57 .

Q: State the t critical value that would be used for a 99% interval based on a sample size of 37.

A: Given information- Sample size, n = 37 Confidence level, c = 99% So, significance level (α) = 0.01…

Q: The proportion of color blind individuals in a population needs to be estimated by the percentage…

A: Critical value: Using Excel formula “=NORM.S.INV(1-(0.05/2))”, the critical value at 99% confidence…

Q: uppose in a hypothesis testing, we obtained a pp-value of 0.003.  Which of the following is/are…

A: he correct is D that is this pp value indicates a big effect size. p value is basically the is the…

Q: Make 1 real-life problem with a solution in any of the following topics; 4. Preforming hypothesis…

A: Two sample proportion test is used to determine whether there is difference between two populations…

Q: From a population of 10,000 individuals of a certain town, what sample size is needed in order to…

A: Yamane's formula can be used to determine the minimum sample size required for the study with…

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.