In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10 dilution of the vaccinia virus was 97.1%. The investigators wanted to know if the 97.1% success rate was greater than 95%. Use a = 0.05.

Q: If the statistical analysis shows that the percentage of men taking Vitamin E who de- veloped…

A: The researchers conducted a designed experiment by randomly selecting the healthy men from different…

Q: From the analysis of students’ marks, Mr Adam decided to do one-to-one consultation with his…

A: If we consider that the students should bring the marks above the median, they are only exempted…

Q: For a population with μ = 80 and σ = 10,what is the X value corresponding to z = -0.50?

A: Given information Mean (µ) = 80 Standard Deviation(σ) = 10 Z = -0.50 Z-score is given by the…

Q: In most research, what does the p-value have to be for results to be considered statistically…

A: Here we want to know correct option.

Q: For a population with  σ = 8,  X=13 and a z-score = 2.21, find the value of µ

A:

Q: A researcher reports independent-measures t statistic with df = 16.  How many participants were in…

A: The degrees of freedom formula for the independent-measures t statistic is, df=n1+n2-2 In the…

Q: Three-fourth of the students in the class have an average lQ of 120 and the rest have an average IQ…

A:

Q: Researchers studied 208 infants whose brains were temporarily deprived of oxygen due to…

A: Explanatory variable in a study are the independent variables which affect the values of the…

Q: A researcher reports an F-ratio with df=3,70df=3,70 for an independent-measures research study.…

A: Given: A researcher reports an F-ratio with df=3,70

Q: (e) forty-three percent of all trials of this type are completed within how many days?

A: Given Information: The duration of a particular type of criminal trial is known to be normally…

Q: n a cohort study, the risk ratio of developing diabetes was close to 1 when comparing consumers of…

A:

Q: In a sample of 45 men, 27 said that they had less leisure time today than they had 10 years ago. In…

A:

Q: On a reading examination given to 900 students, Elaine’s score of 602 was higher than the scores of…

A: Solution

Q: Determine whether the given description corresponds to an observational study or an experiment. In a…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with raw…

A:

Q: In this investigation, you learn how to decide if a value of x2 is statistically significant. How…

A: Here we have been provided with two samples falling into various categories. We will use Chi-Square…

Q: A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. How…

A: A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. It is…

Q: What is the measure of PD?

A: From the figure  FD is diameter , Therefore, ∠FED=90∠FEP+∠PED=9035+∠PED=90∠PED=90-35∠PED=55

Q: For a population with u = 80 and o = 10, what is the X value corresponding to z-score = - 2.00? Edit…

A:

Q: The relative risk of developing lung cancer among individuals who smoke is 15.0. Which of the…

A: Relative risk is the ratio of probability of an outcome in an exposed group to the probability of an…

Q: If you choose to work with a t-score, how many degrees of freedom would you have?

A: Here given  Sample mean = 87 Sample size = n = 25

Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

Q: In a group of 55 examinees taking the 50-item test, Rachel obtained a score of 38. This implies that…

A:

Q: The predicted college GPA for a high school GPA of 3.8 and a college board score of 500 is (Round to…

A: The equation of the college GPA is y^=0.16+0.51x1+0.002x2. The variable x1 is defined as the high…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: What percentage of the variability in the number of delivery days for a car is NOT explained by…

A: From the given output, the R square value is 0.7105.

Q: data has extreme scores, what is the best measure of average?

A: The mean is the average value of the data set. It is calculated by summing up all the observations…

Q: A researcher surveyed 500 people. She found that the individuals who took some form of over the…

A: The study is experimental study. In this type of study , the group is subjected to some treatment…

Q: A recent polls show that 61% of adult Americans are comfortable with the legalization of marijuana,…

A:

Q: NCAE shows that the average score of the students is 80 and sd is 15. What is the percentile rank of…

A: Given :     Mean (μ)=80Standard deviation (σ) = 15x=84

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Q: A researcher reports an F-ratio with df = 3, 56 from an independent-measures research study.  How…

A: An F-ratio is determined using sum of square for between groups with degree of freedom of between…

Q: The efficiency expert at a computer company tested 40 engineers to estimate the average time it…

A: Given,sample size(n)=40sample mean(x¯)=12.73standard deviation(s)=2.06degrees of…

Q: An engineer tests air conditioner compressors made with a new design to see if fewer have…

A: Given : Z =-1.82 Using Z score value we find how much time standard deviation away from mean.

Q: If a newborn lab rat receives a hormone and its weight (in ounces) is converted into a z score that…

A: The standard normal variable is z, which follows the normal distribution with the mean of 0 and…

Q: On a reading test, Amelia’s score of 455 was higher than the scores of 4256 of the 7210 students who…

A: Number of data values less than 465= 4256 Total number of data values= 7210 Percentile=?

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…

Q: The percentage of scores falling below a z-score of .65

A:

Q: A researcher uses a repeated-measures design to compare individuals’ performance before treatment…

A:

Q: What is the odds ratio for a study with a logistic regression coefficient -0.2524?

A: As given, the logistic regression coefficient is  -0.2524. It is asked to find the odds ratio.

Q: Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100…

A: Quantitative variable: A variable that provides numerical values of individual and Arithmetic…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: A survey found that in a sample of 100 families, 37 owned cats. A survey done 5 years ago found that…

A:

Q: 2. On a reading test, Amelia's score of 455 was higher than the scores of 4256 of the 7210 students…

A: Obtain the percentile for the Amelia’s score. The percentile for the Amelia’s score is obtained…

Q: a. How many of the 125 people had resting pulse rates of more than 100? b. What percentage of people…

A: a. There are totally 125 people who had resting pulse rates. Count the number of dots that are above…

Q: Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What…

A: Given data, μ=1010 σ=200 z-score=0.25

Q: Given μ=25and σ=4.8,what would be the x-value for the ninety-fifth percentile?

A: Given:  μ=25 σ=4.8

Q: (d) How high a score must you have in order to be in the top quarter of the population in social…

A: (d) The high score for order to be in the top quarter of the population in social insight is,…

Q: Given μ=25and σ=4.8,what would be the x-value for the twenty-fifth percentile?

A:

Q: Marshall took the SAT ( μ=1010,σ=200) and had a raw score of 950. What was his z-score? What was…

A: Given data,  μ=1010 σ=200 Raw score X=950

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.