A church group wanted to know the most popular snack at the Wednesday night service. They wanted to see how many males and females preferred cookies over brownies. The design was a 2x2 contingency table. The total number of participants was 45. Chi Squared analysis revealed a test statistic of 1.93 and a p-value of 0.32. What is the proper way to report the statistical statement?

Q: suppose you want to estimate the proportion of those who passed the subject (grade ≥ 75). How large…

A: Given:Relative error=10%Risk factor=15%Find:Sample size?

Q: A researcher wants to compare the depression outcomes between two groups: a group that uses…

A: Introduction: Scales of measurement: Nominal: When the possible observations are tags or categories…

Q: The scores of 40,000 county employees who took a recent civil service exam were normally distributed…

A: It is given that the scores follow normal distribution with mean 70 and standard deviation 10.…

Q: If the t-statistic for a variable is -1.74, is the variable statistically significant? No Yes

A: Given: Test statistic is -1.74

Q: Krista wants to compare males and females on number of hours of physical activity done per week. If…

A: The number of hours Physical activity done by males are collected. Similarity the number of hours of…

Q: Proportion of Variance

A: pca is dimensionality reduction technique by performing pca we get which component explains the…

Q: hat is the possible range of values for Pearson's coefficient of skewness?

A: Here  For Perason coefficient of Skewness

Q: Why do you think any serious researcher would use the sample mean to estimate for the population…

A: Generally research is carried out to determine a particularoutcome in the targeted…

Q: What statistical test should she use to analyze the data?

A:

Q: The population Mean is 125 with a st dev of 22.However , the population distribtuon is skewed to the…

A:

Q: What aspect does the repeated measure test decrease when compared to an independent t test?

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: Explain why the minimum and maximum observations are added to the three quartiles to describe better…

A: Quartile: Quartiles are the values which divides the data into four equal parts. First quartile:…

Q: An automobile insurance agent believes that company A is more reliable than company B. Which level…

A: We need to use concept of Scales of measurements to solve this

Q: What is the formula for t RATIO FOR TWO POPULATION MEANS (TWO INDEPENDENT SAMPLES)?

A: To compare population means of two independent samples t-test is used. The null hypothesis is: The…

Q: For his statistics assignment, Johnson examined differences in quality of grades obtained by…

A: Johnson examined differences in quality of grades obtained by students on the regular program of a…

Q: Marijuana was recently legalized in Canada. A recent study reported that at low doses marijuana…

A: Standard deviation is the square root of variance.

Q: Can you help me determine the test statistic and P-value of the following equation?

A: Hypothesis testing plays a major role in research and development. To diagnose the underlying cause…

Q: What is the Mean difference (d) and the SD of Difference?

A: Enter the values of Millennials and Zoomers in columns A and B of excel.   The sample mean for the…

Q: Putra College surveyed its students to determine the average weekly time spent surfing the internet.…

A: Population in the set of all outcomes of interest in a study. In real life scenarios studying the…

Q: A local real estate magazine used the median instead of the mean when it reported the SAT score of…

A: It is given that the data were strongly skewed to the right.

Q: Consider taking a point estimate from a randomly selected population of 120 students with a number…

A: The population is defined as a whole set of observations. It is difficult to deal with,…

Q: A researcher is interested in examining the relationship between assertiveness and level of stress…

A: 1)  The level of assertiveness and level of stress is rated on a 5-point scale, hence we ordinal…

Q: The student government took a poll on a policy they would like to suggest to the dean. The…

A: Given that,

Q: If your critical value is ±1.96 and your z-value is -2.44, do you reject that the sample mean…

A: From the given information,   Critical Value: ±1.96 z-value: -2.44

Q: Are the statistical techniques used in the analysis of data appropriate to the levels of measurement…

A: Statistics               Statistics is widely used to gathering the different datasets,…

Q: A researcher uses a repeated-measures ANOVA to evaluate the results from a research study and…

A: Given that, A researcher uses a repeated-measures ANOVA to evaluate the results from a research…

Q: Given this data and the R2 value being R2 = 0.446   How can you interpret the results of this…

A: The R2 is known as the coefficient of determination, The R2 measures how much variation in the…

Q: After the analyses, Rosalind found a significant difference in test scores between taking the test…

A: The results are different because it is likely that the test statistic value obtained by Rosalind is…

Q: on a 100 item test romel got a score of 88 which is the 9th decile what does it mean

A: Di = i * (n + 1)  10 th data

Q: A social worker notes that in a population of psychiatric inpatients the ethnic mix seems out of…

A: Hey there! Thank you for posting the question.  Since you have posted a question with multiple…

Q: The athletic director at a large university compared the proportions of freshmen (1st year students)…

A: The hypothesis is, Null hypothesis: H0: There is no difference between proportions of freshmen and…

Q: What should we do with a small p-value?

A: The P-value is the probability we get the value of the test statistic, or something "more extreme"…

Q: The waterworks commission needs to know the mean household usage of water by the residents of a…

A: The maximum error error = 0.13 gallonsThe variance = 2.56 gallonsThe standard deviation = √(2.56) =…

Q: When would you use a chi-square analysis A.When the variance between two groups are equal B. When…

A: C. When you only have categorical variables to analyze

Q: According to the P value, what is the mean difference statistically significant? Based on the…

A: Given that  P-value = 0.766 Level of significance = 0.1

Q: Is there a significant relationship between income and the level of work adjustment of the…

A:

Q: A social science teacher wants to compare the perception of students towards activism before and…

A: The dependent variable must be continuous. When data are present in dependent format [ i.e after…

Q: What is the value of the mean square within?

A: What is the value of the mean square within

Q: In most cases of study, the statistical analysis is not giving the precise value of measurement but…

A: It is because in most cases we don't have data on the entire population but only a small part of it…

Q: Why is the Chi- square test applicable to the given scenario?

A: For the given sample data, we will conduct a chi-square test for independence.

Q: When will a chi-squared statistic equal zero? You need to very specifically discuss the data.

A: Generally, the chi-squared statistics are always related to the null hypothesis of given data. When…

Q: B. Would the Floor Area be a significant predictor of Assessed Value?

A: Let x be the floor area, and y be the assessed value.

Q: Why do we need to study the variation of a collection of data? Why isn't the average by itself…

A: Step 1: An important characteristic of a data set is the variation in the data. In many of the data…

Q: The mean of the distribution of sample means would be equal to:

A: The mean of the distribution of sample means would be equal to ?

Q: A population of scores has a mean of µ=89, a median of 87 and a mode of 85. What is the most likely…

A: Given data, Mean=89 Median=87 Mode=85 What is the shape of the distribution?

Q: For which quartile, 25% observations are greater and 75% are smaller

A: We know that,

Q: Find the technique for gathering data in the study below. An analysis of a sample of 31,000 patients…

A:

Q: The National Study of the Changing Work Force conducted a study of 2958 wage and salaried workers on…

A:

Q: Suppose you computed r=-0.524 with 20 data points. Is r significant? Explain. 0.05 significance…

A:

Q: In the Control Group ONLY: Was there a statistical difference between blood glucose values at…

A: Null Hypothesis: H0: There is no difference between blood glucose values at baseline and 30 minutes.…

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.