Chapter 4, Section 1, Exercise 009 - MathPad State the null and alternative hypotheses for the situation described below for a statistical test. Your answer should be an expression composed of symbols: =,≠,<,>,μ,μ1,μ2,p,p1,p2,ρ,p^,p^1,p^2,r. Testing to see if there is evidence that the proportion of people who smoke is greater for males than for females. Let group 1 be the males and let group 2 be the females. H0: vs Ha:Edit

Q: ignificance is referred to as "independent of observations". Explain this assumption.

A: The assumption of independence is used for T tests, in ANOVA tests, and in several other statistical…

Q: The human resource manager of company wanted to know how the Performance of the workers depend on…

A: multiple regression model

Q: What is the best statistical test that I can use on a dataset where I am trying to establish a…

A: Suppose we need to test whether there is correlation between two variables X and Y based on the…

Q: State the null and alternative hypotheses for the statistical test described below. Your answer…

A: A population parameter is equal to a hypothesized value, according to the null hypothesis.  The null…

Q: A researcher wanted to examine the effect of a new math study skills program on second graders.…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A pharmaceutical company is trying to determine if a new drug is more effective than the current…

A: Given that: Old drug New drug Successes 419 Successes 261 Observations 500 Observations 300…

Q: How do I interpret the mean of 12.5 and median of 12.5 with no repeating so there is no mode? How…

A: Given that  Mean = 12.5  Median = 12.5

Q: 1.Interpret the result in 1 sentence to answer the research question (you may use the wording from…

A: Given Data :   Sample 1 = Age 70 Sample 2 = Age 80 Difference = Sample 1 - Sample 2   72 67 5…

Q: A political analyst believes that a senator's recent decision to support a bill resulted in a drop…

A: The given data is as follows: Approval Rating Before (Percent)Approval Rating After…

Q: 2. The BMI levels for a random sample of thirty females with a college degree and for a random…

A: Two Sample t test Here, we want to check the claim whether the average BMI level for the females…

Q: I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score.…

A: Givensample size(n)=30sample mean of these differences = 2.0sample standard deviation of differences…

Q: statistical significance,

A: What Is Statistical Significance? Statistical significance refers to the claim that a result from…

Q: The human resource manager of company wanted to know how the Performance of the workers depend on…

A: Multiple linear regression

Q: The World Health Organization keeps a record of many statistics thought to be social, economic and…

A: Test whether there is a significant increase in the number of physicians from 1990 to 2017: Given…

Q: Next, let's imagine that you want to examine whether the pattern of frequencies across the political…

A: We want to find the  value of Pearson's Chi- square test from the above given problem ?

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: We have given that Mean(µ) = 140 Sample mean (x̅) = 134 Standard deviations (s) = 28

Q: The average score of students during the past year in the statistics subject was 80%, and their…

A: Given Information: The average score of students during the past year in the statistics subject was…

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Given Solution:

Q: The claim is that for 12 AM body temperatures, the mean is \mu > 98.6 The sample size is n = 3 and…

A: Given: The researcher's claim is that for 12 AM body temperature, the mean value is greater than…

Q: You are studying whether CSUB's graduate students are more likely to be parents or more likely to…

A: Solution: Given information: k= 2  Categories  N= 350   total observation ( frequency )   f0= 188…

Q: Was the outcome of 5 women and 3 men was believable using 2 specific results from the data provided?…

A: Here in this question, it is given that an airline has just finished training 25 pilots - 15 males…

Q: Find the value of the test statistic. (Use ₁-₂. Round your answer to two decimal places.) 0.88 Find…

A: Given is the data on the driving distances for the two balls, 40 balls of both the new and current…

Q: Explain the uses and misuses of statistic , support ur answer with logical reasoning

A: There are so many uses of statistics as below: 1) Statistics provides a good representation of data…

Q: Is it commonly believed that the mean body temperature of a healthy adult is 98.6f you are not…

A: Solution: From the given information, the claim is that the mean body temperature of a healthy adult…

Q: total years of education and an indicator variable for female (1 if yes, 0 otherwise). SUMMARY…

A: As due to the honor-code we are authorized to answer only 3 subparts for each question and that you…

Q: Company records indicate that at most 49% of employees commute to work using public transportation.…

A: Solution

Q: 2. Five hundred sixty-nine people were surveyed on their favorite source of caffeine. The results…

A: Chi-square is given by, Chi-square= summation (Oi-Ei)2/Ei Where Oi's are observed values and Ei's…

Q: What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the…

A: 1. The claim of the hypothesis test is that mean completion time has increased. Let  μ be the…

Q: Assuming there are 150 students in our statistics class, 20 of you have received 4 hours of study…

A: Given Data: Sample mean=75 Population mean=72 Population standard deviation=6 n=20   For one sample…

Q: According to a recent study, college students own a mean of 6.75 technological devices. (laptops,…

A:

Q: I wanted to test if the mean Exam 3 score in this course was different than the mean Exam 2 score.…

A: Given, The sample mean of the differences  = 2.0

Q: It is believed that from among senior high school students, 15% would like to pursue engineering…

A: It is believed that from among senior high school students, 15% would like to pursue engineering…

Q: In 2015, the proportion of people with Traumatic Brain Injury was 0.0062 in the United States.…

A: In 2015, the proportion of people with Traumatic Brain Injury was 0.0062 i.e. P = 0.0062 Sample size…

Q: Periodically, Merrill Lynch customers are asked to evaluate Merrill Lynch financial consultants and…

A:

Q: Here is presented data to you about the books that Alexa writes every year. 3, 4, 5, 6, 7, 8, 2, 10…

A: State the hypotheses.

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A:

Q: In a study of treatments for very painful "cluster headaches, 155 patients were treated with oxygen…

A: This tests for a difference in proportions. A two proportion z-test allows you to compare two…

Q: When performing a statistical analysis on two variables, you identify that there is a very strong,…

A: Let the two variables be X and Y When performing a statistical analysis on two variables, we…

Q: The Following are Data for Systolic Blood Pressures, in mm of Mercury, of 12 Chimpanzees. 121, 125,…

A: Obtain mean of the sample data. Denote the values of the systolic blood pressures in mm of mercury…

Q: Are there more words in the English language   That start with an "r" OR For which "r" is the…

A: Consider the given situation:"Are there more words in the English language that start with an "r" OR…

Q: Please help find the test statistic, the p-value of the test, if we reject the null, and if there is…

A: Solution: State the hypotheses Null hypothesis: That is, the rate of inaccurate orders is equal to…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.