When determining the sample size, the margin of error is double the same as not related half of interval width.

Q: Explain what happens when finding the margin of error if all stays the same except the sample size…

A: Solution: The margin of error can be calculated by using the formula:

Q: A medical researcher wants to find the percentage of females who take vitamins. He wishes to be 95%…

A: Given that  Margin of error =E =4%=0.04 Sample size n =180 Sample proportion p^=35%=0.35

Q: The midrange of a distribution is defined as the average of the minimum and the maximum of that…

A: The mid-range is rarely employed in the actual statistical analysis since it is inefficient as an…

Q: The margin of error in a research study is indicative of the precision and accuracy of the research…

A: Margin of error is a measure of the extent to which the sample may vary from population.  It is a…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: When you have a skewed distribution, it is better to use-- than -- interquartile range;range…

A:

Q: How do the Boundaries for the observed sample, Common and Rare Outcomes?

A:

Q: What sampling techniques should be used while establishing if someone is happy or not?

A: Here we want to establish sampling technique if someone happy or not.

Q: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: What are the 2 conditions that would make the sampling distribution of the sample mean, x,  NORMAL?…

A: The objective is to define the condition that is necessary to interpret the sampling distribution of…

Q: can you give the importance of  work sampling in health care?

A: Given problem Given that   Work Sampling : i) It is a type of sampling technique ii) It determines…

Q: based on the estimation what is the appropriate conclusion?

A: Let p be the population proportion of all people living in a certain region.Given that,sample…

Q: For a box plot, here are 4 values at the low end of a dataset and 4 values near the high end of a…

A: Given: Data 2.7 5.5 6 9 … 50.5 54 60 65 Value 5 & 47

Q: what can we say about outliers if the mean and 5% trimmed mean are equal?

A: Mean is the average of all data points. Trimmed mean is similar to a regular mean, but it trims any…

Q: For a set of observations, Q1 = 122 and IQR = 15. %3D Values greater than or less than are possible…

A: For Set of observations, Q1 =121 and IQR = 15 are given,

Q: Mother smoking Infant colic Yes No Total status Yes 15 167 182 No 111 2477 2588 Total 126 2644 2770

A: The given data is as follows:Mother smoking statusInfant…

Q: How does the sample size affect the value of the mean and the standard deviation? Please elaborate.

A: Mean : The mean is the data's Centre point or typical value and summarizes a complete dataset with a…

Q: A newspaper infographic titled "Baby's First Photo Reveal" summarized data from a survey of 1,000…

A: Answer is given by confidence interval.

Q: If the variance of a national accounting examination is 828, how large a sample is needed to…

A: Given data: Variance  = 828 Margin of error = 4 points Confidence level = 99 % To calculate the…

Q: To draw a boxplot, we need precisely which of the following mean, variance, outliers median, first…

A: In this case, we need to identify the suitable answer for the given statement.

Q: Let sample proportion . How large a sample should be taken to be 95 % sure that the error of…

A:

Q: What are the main differences between outliers and influential observations

A: Outlier and inferential observations are both observed in the regression. In the scatter diagram,…

Q: Describe about the types of sampling.

A: In simple random sampling, each of the unit is population has equal chance of being selected in the…

Q: Explain about the Sampling Distribution of mean 1 less mean 2.

A:

Q: How can we check to see how much the presence of an outlier (or perhaps a few outliers) affect the…

A: Most used statistics are Mean, Median and Mode. Let us now discuss the effect of outliers on…

Q: hy is an interval estimate for the population preferred to a point estimate?

A: We know that  Point estimate : It is a single value (Statistic) used to estimate the population…

Q: An investigator decided to conduct a research to describe the average number of females in each…

A: The number or values calculated from the sample data are called sample statistics. The number or…

Q: Addmissions officer sampled 124 entering freshmen and found that 35 of them scored less than 530 on…

A: According to the provided information, x=35 n=124

Q: Suppose that we will randomly select a sample of 64 measurements from a population having a mean…

A: From the provided information, Mean (µ) = 20 Standard deviation (σ) = 4 X~N (20, 4)

Q: Describe about the shape of sampling distribution.

A: The underlying distribution of statistic is known as sampling distribution. The collection of sample…

Q: Obtain standard error of an unbiased estimate of population mean. теаn.

A: Answer: For the given data,

Q: Describe about the All Possible Random Samples.

A: The random samples can be selected in the following methods: Simple random sampling: If a sample of…

Q: Explain how a sampling distribution of a sample can be constructed.

A:

Q: Sample mean is more sensitive to outliers in the data compared with the median True False

A: In question, We'll check that given statement is true or false. The explanation is below,

Q: The margin of error in a research study is indicative of the precision and accuracy of the research…

A: Statement: The margin of error in a research study is indicative of the precision and accuracy of…

Q: If the sample size is increased, the margin of error will decrease.   True or False

A: Given statement : " If the sample size is increased, the margin of error will decrease "

Q: Is the sample size of survey is multiplied by 100, then by what factor is the margin of error…

A: Solution

Q: When the median is computed for a sample, all values in the data set are * .used True O False O

A: Answer  - True

Q: Compute the point estimate for the difference between the means. Report the standard error of the…

A: Given that n1=15, n2=12

Q: If the number of degrees of freedom for a chi-square distribution is 32, Determine the population…

A:

Q: In a distribution plot, if mean is much smaller than median, does the underlying sample have very…

A: Outliers- It is an observation or a value that lies outside from the population or which is far away…

Q: what is the sample size if the standard deviation is 8 and margin error is 3 at 99%

A: We have given that,  Standard deviation (σ) =8, margin of error (E)= 3 and confidence level (C.I) =…

Q: What size sample should be obtained to be 95% confident that the sample proportion will not differ…

A: Suppose p is the true population proportion.