4. In statistics, the formula E = t can be used to calculate a margin of error. Solve this formula for n, the sample size.

Q: hen creating a 99% CI based on data from one sample the size of n=31, which t value should be used?

A: Given: n=31 The degree of freedom=n-1=31-1=30 The level of significance (α)=0.01 We see inside the…

Q: Suppose a random sample size of 60 is taken from a population with p = 0.51. What is the mean of…

A:

Q: When solving problems where you need the sampling distribution of r, what is the reason for…

A: The basic reason for transforming r to z which makes the “r” normally distributed with a known…

Q: '. By how much must the sample size n be increased if the width of the CI (7.5) is to be halveď? If…

A: The formula for calculating the sample size in terms of width of the confidence interval

Q: Given the population size with a corresponding margin of error, determine the sample size of each of…

A: Given that,  N = 1500,  e = 5%     =0.05 The formula for calculating the sample size is,

Q: o=58. From sample sizes of 36 adults find the proportion of sample means having values of at least…

A: here , sample size  = 36 population  mean = 162 population standard deviation = 58

Q: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine

A: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine Explanation: Here,…

Q: a. If a constant c is added to each xi in a sample, yielding yi = xi+ c,how do the sample mean and…

A: The sample mean of a dataset is computed by dividing the sum of the observations ∑x by the total…

Q: If we are dealing with data obtained about the sample means, then we will use the formula z =…

A: Solution

Q: A researcher wants to calculate the prevalence of Alzheimer's among members of a specific community…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: Of all of the possible samples, what proportion will show an average weight loss? In symbols, what…

A: The proportion would show an average weight loss is, PM<0=PM-μσn<0-964=Pz<-93=Pz<-3 The…

Q: A sample has SS= 20 and s? = 4. How many scores are in the sample?

A: Six scores are in the sample.

Q: 14) A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A:

Q: A normal population has a mean of µ = 80 with σ = 20. a. If a single score is randomly selected…

A:

Q: 22) What sample size is needed if a = 0.05, ơ = 1.2 amd E = 0.3? A) 8 B) 44 C) 7 D) 62

A:

Q: Given the population size with a corresponding margin of error, determine the sample size of each of…

A: Solution-: Given: N=3050,e=0.01 (or 1%) We determine the sample sample size (n)=?

Q: 3. For a population with µ = 40 and o = 8, what is the z-score corresponding to X = 34?

A:

Q: A hospital has studied its patient history and had concluded that 2% of patients that have been…

A: Given: Proportion of patients infected with staff bacteria = 2100=0.02

Q: 2) You are planning a survey for which the findings are to have a 95% level of confidence. How many…

A: Formula for the sample size needed to estimate a population proportion is

Q: (i) In a survey, consider two large samples of size 1550 and 1750 (in numbers), which have mean 64.5…

A: Please note that both the questions provided are two completely different questions. As per our…

Q: How many different samples of size 4 can be selected from a population of size 8? Select one: a.8…

A: We have find namber of ways

Q: 3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these…

A: The objective is to guess the average battery life of 100 iPhones.

Q: You are told that the proportion p of those who answered "yes" to a poll about internet use is 'p =…

A:

Q: A genetic theory says that a cross between two pink flowering plants will produce red flowering…

A: Solution-: Given: We find value of sample size, n=?

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: 4. Suppose a new sample is chosen and you got the following estimated OLS line: predicted…

A: It is given that the estimated OLS line is shown below:

Q: The newspaper in the previous problem decides to increase the size of its random sample of citizens…

A: Given Data: Previous sample size=250 New sample size=500

Q: The theater owner wants to sample 250 customers out of the 3500 in attendance. This will be a 1 in k…

A: Population is the set of all objects of interest. Sample is s subset of the population. It is not…

Q: Suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

A: As we know that, Sample proportion is given by, p= X/n Where n is sample size.

Q: In what range would you expect to find the middle 98% of most head breadths? Between and If you were…

A: Let x1 and x2 be the head breadths. The middle 98% of most head breadths lies between is,…

Q: In a sample of size 20, the sample mean is 60. In this case, the sum of all observation in the…

A:

Q: How many simple random samples of size 3 can be selected from a population of size 7? а. 35 b. 210…

A: Answer - How many simple random sample of size 3 can  be selected from a population of size 7 ?

Q: b. He would like the sample mean to be within 1 square inch of the population mean, with probability…

A: Here use normal distribution

Q: 1. If a sample consists of n = 16 scores, of the scores would be used to calculate the range and of…

A: From the given information, Sample size (n) = 16 Thus,

Q: 4. Find the point estimate of the proportion of people who wear hearing aids if, in a random sample…

A: We have given that, x= The number of people who wear the hearing aid   = 30 n= The total number of…

Q: If you obtained all possible samples and computed the mean from each sample, the mean of sample…

A: Given:            The population of students stating their expense on a textbook. N=234.

Q: Why must the sum of all fs in a sample equal N?

A: Every datum in a sample is assigned to a category/class depending on its value. For a given dataset,…

Q: How large a sample is needed

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.01 The critical value is ,…

Q: What is the skew of the following data set X = [4; 5; 5; 6]?

A: A distribution can be symmetric or asymmetric. Normal distribution is a symmetric distribution.…

Q: (c) If we want a margin of error of only + 1.0, what sample size is needed? Round your answer up to…

A: The following information is provided. consider the level of significance is 0.05. Also,

Q: A student organization is trying to decide whether or not to offer more movies on campus. They want…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: If we want to estimate the population proportion with a margin of error of 0.10 for a level of…

A: Given data,E=0.10z value at 90% confidence is Zc=1.645let proportion p=0.5n=?

Q: If s=16 and the estimated standard error is 2, then the sample size must equal to ___.

A: It is given that the sample standard deviation is 16 and standard error is 2.

Q: if the 90% Ci for the population mean is (-4.58, 6.54) what is the sample mean O a. can't be found

A: Given data,Lower limit =-4.58Upper limit =6.54Sample mean =?

Q: Given the population size with a corresponding margin of error, determine the sample size of each of…

A: Given: N = 1500 e = 5% = 0.05

Q: Given a population of 5000 scores with mean µ = 86 and o= 10. How many scores 3. above 116?

A:

Q: Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease…

A: According to the provided information, n=153x=32p=xn=32153=0.209

Q: d) If the true mean is 4200, what sample size is needed if you do not wish for the Type II error…

A: d. Given information: Formula for Type II error is Given that the type II error rate to be not…

Q: In a random sample of 1000 persons from town A, 400 are found to be consumers of wheat. In a sample…

A:

Q: C1. A computer spam filter is 98% effective at sending spam emails to my junk folder, but will also…

A: Solution