In each of the following situations, identify the population and the sample (i). There are 50 books in statistics in our library which contains a collection of 5,000 books. (ii). About 20% of the stones heaped on the building site are round in shape. (iii). The dream that there will be more female than male politicians in Ghana will never be realized (iv) About 10% of pregnant mothers reporting to hospitals are infected with HIV virus. (v) Since the last major earthquake in 1939, there have been 60 earth tremors in Ghana, with 20 these occurring over the past 5 years.

Q: 35. In a large sample, which is the bigger concern?

A: HERE GIVEN, SAMPLE SIZE IS TOO LARGE

Q: Suppose I was interested in a snapshot of the number of persons leaving a grocery store today to…

A: 1) Suppose I was interested in a snapshot of the number of persons leaving a grocery store today to…

Q: For the scenarios below, determine which sampling method was used (simple random, cluster,…

A: Introduction :-  For the scenarios given, we have to determine which sampling method was used…

Q: Describe the differences between a probability sample and a nonprobability sample

A: Introduction: A probability sample involves the use of probabilistic concepts to collect the sample,…

Q: A statistics professor wants to know how her students feel about an introductory statistics course…

A: Cluster sampling: In cluster sampling the whole population is divided into different sections or…

Q: 5. Suppose a 12 year old asked you to explain the difference between a sample and a population, how…

A: As per our guidelines, we are allowed to answer first question only. Please repost next question…

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

A: Solution

Q: If we have a statistical community with only six vocabulary, and you need to choose a sample of only…

A: Given that, in a statistical community there are six vocabulary and we need to choose three sample…

Q: What is the difference between selecting a member at random from a finite population and taking a…

A: A simple random sample is a random sample selected by a method in which all possible samples, of a…

Q: An article in a newspaper states that the proportion of traffic accidents involving road rage is…

A: An article in a newspaper states that the proportion of traffic accidents involving road rage is…

Q: Identify the type of sampling technique used by the researcher in each of the following situations.…

A: We have given the following statement about the sampling  technique.

Q: b)  If the sample size was increased to 10,000 American movie-goers, what effect would this have on…

A:

Q: Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: Create real life problem situations in psychological field that illustrates the use of each of the…

A: There are probability and non probability sampling techniques.

Q: Henry conducts a survey at his middle school to determine the students' favorite after-school…

A: There are four main types of probability sample. Simple random sample: In this, every member of the…

Q: d) If your random sample actually produced a mean of 723,500 php, would you consider this as…

A: Here use rule for finding unusual range  That is values those are above 2 standard deviation from…

Q: Do this! Sample Problem 3. How many people can be seated in 6 square tables lined up straight to…

A: In this question we have to find How many people can be seated in 6 square table lined up straight…

Q: a.    If samples of a specific size are selected from a population and the means are computed, what…

A: The answer is explained below-

Q: b. Alpha is 10%, the sample size is 45 and sigma is known.

A:

Q: When Rich calculated the sample mean in Part 2, he mistakenly used the numbers 20, 25, 13, 9, 15,…

A: Given numbers are 20, 25, 13, 9, 15, 11, 17, 17, 30 Sample mean = Total sum of given numbersTotal of…

Q: When you throw a dice twice, what is the size of the sample space?

A:

Q: Since the sample size is always smaller than the size of the population, the sample mean O A. can be…

A: Correct answer is (A)

Q: What is meant by the statement that the sample mean has a sampling distribution?

A: The parameters that describe a population, like mean, variance, and standard deviation, are already…

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

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: For a sample of size 25, degrees of freedom is equal to _____.

A: From the given information,   Sample size = 25   The objective is to find the degrees of freedom.

Q: If the sample size is n=16 what is likely true about the shape of the population?

A: Solution:  Central limit theorem: The central limit theorem state that as the sample size increases…

Q: question 2. Determine the type of sampling used (simple random, stratified, systematic, cluster, or…

A:

Q: If we wanted a random sample of students in a cafeteria, why couldn't we just take the students who…

A: Answer: Here random word itself says that we couldn't just take the students who order coke with…

Q: What is the P (t < -0.3) with a sample size of 13.

A: The sample size is, n = 13 The degree of freedom is, df= n-1   =13-1   =12

Q: how do you find the simple random sample of 15 restaurants?

A: In simple random sampling each member of the population has an equal chance of being included in the…

Q: Why doesn't it make sense to test the hypothesis that the sample mean is 42?

A: It is given that the hypothesis test is sample mean is 42.

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

A: Given: 2% of patients have been admitted with staff bacteria.

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: Explain the four different types of sampling and give an example of each.

A: Different types of sampling methods with examples.Types of random samplings(1) Simple random…

Q: Create real life problem situations in psychological field that illustrates the use of each of the…

A: There are probability and non probability sampling techniques.

Q: P(-2.5 < t < 2.5) with a sample size of 15 ?

A: Given that  Sample size (n) = 15 Degrees of freedom (df) = (n-1) = 15-1 = 14   Here asked about…

Q: What is the P(t > -0.4) with a sample size of 13.

A:

Q: A substitute teacher wants to know how students in the class did on their last test. He asks only…

A: Step 1 The sample is 10 students sitting in the front row as the teacher asked only those 10…

Q: In a US presidential election, the incumbent president wins with 51.5% of the vote to 48.2% for the…

A: Note: Hi! Thank you for the question. As you have posted multiple sub-parts, according to our…

Q: In what range would you expect to find the middle 50% of most head breadths? and Between If you were…

A:

Q: if the population mean is 12.45 what is the mean of the sampling distribution of its means?

A: Given : Population mean(μ) =  12.45

Q: To try to predict the outcome of the vote for the school board election, a town manager used random…

A: The correct option is option (A) "Yes, because it is a simple random sample"

Q: Give two reasons why it would be necessary to examine a sample of the shirts produced rather than…

A: Give two reasons why it would be necessary to examine a sample of the shirts produced rather than…

Q: Suppose that in a truckload of potatoes, 6% of the potatoes are bruised or damaged in some way. What…

A: Given: p=0.06 n=200 The mean of sampling distribution of the sample proportion is approximately…

Q: If you had a choice between two samples of equal size, one obtained through a simple random sampling…

A: Stratified sampling performed after dividing data into homogeneous strata.

Q: -One Sample Dichotomous Outcome- Suppose a similar study was conducted two years ago and found that…

A: Giventhe prevalance of smoking among freshman = 27% = 0.27We assume to use 95% confidence interval…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.