What is the null and alternative hypothesis? These can be in words and/or symbols ( PPT
Q: The janitor calculates a p-value for the hypothesis test of approximately 0.113. Choose the correct…
A: here given p-value = 0.113 and significance level = 0.01 p-value is probability of getting extreme…
Q: What is/are the difference/s between a one-sided hypothesis and a two-sided hypothesis?
A: Differentiate the two sided and one sided hypothesis.
Q: A politician believes that 60% of constituents are in favor of a particular issue. She takes a…
A: Null hypothesis:A statistical hypothesis which is assumed and whose validity is tested for possible…
Q: There is an advantage in stating the hypothesis both in the null and in the alternate; it adds…
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Q: (a) what are the null hypothesis H, and the alternative hypothesis H, that should be used for the…
A: Test is that whether the average is greater than 40 minutes. The type I error is defined as…
Q: What are the two kids of errors we can make in hypothesis testing?
A: The two kinds of errors are 1)Type 1 2)Type 2 Type 1 Error: It is referred as False Positives. It…
Q: anna, a nutritionist, decided to investigate whether there was a difference in the consumption of…
A: Given: The provided data is: Men Women Other Yes 24 21 18 No 16 19 22 Since the data is…
Q: If the equality term in the null hypothesis involves ≤ or ≥, then which test would be appropriate?
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Q: Ho:µ = µo is a two-tailed hypothesis test O True O False
A: Given,H0:μ=μ0
Q: state the null and alternative hypothesis.
A: In 2012, it was reported that McDonald’s had 62 million customers per day. here hypothesized mean is…
Q: Select the correct null hypothesis, Ho, and alternative hypothesis, Ha, in symbolic form.
A: Here use basic of hypothesis testing
Q: Store owner asks 55 people in City A and 50 households in City B whether anyone in their household…
A: Introduction: Denote p1, p2 as the true population proportions of households that had used their…
Q: The null hypothesis is a claim about a:
A: It is needed to explain about the null hypothesis.
Q: If a hypothesis test leads to the rejection of the null hypothesis, a have been committed. Type I…
A: Given that the hypothesis test leads to the rejection of the null hypothesis.
Q: The mean number of rushing yards for one NFL team was less than 109 yards per game. If a hypothesis…
A: The test hypothesis will be, H0: μ ≥ 109 H1: μ < 109. This is a one –tailed test.
Q: Explain how to conclude when you would reject the null hypothesis based on a p-value. Give a numeric…
A: We know that when p-value is less than the significance level than reject the null hypothesis and…
Q: If a researcher is wrong in his decision and he rejects the null when the null is true, what type of…
A: Type I error: The type I error is the rejection of the null hypothesis when it is actually true.…
Q: Suppose that you want to perform a hypothesis test for a population mean, µ. a. Express the null…
A: Hypothesis testing: Hypothesis testing was introduced by R.A.Fisher (Ronald Fisher).It is a…
Q: A hypothesis test is to be performed. State the null and alternative hypotheses.
A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on…
Q: If you reject the null hypothesis, you may be making. O a Type Il error O a Type lerror O a Type Il…
A: Type I Error : Type I error occurs when we reject true null hypothesis. Type II Error : Type II…
Q: what kind of hypothesis test is this
A: We have given that the information of two variables, the independent variable X i.e, dynamic risk…
Q: Descibe the difference between the null hypothesis and alternative hypothesis. How do we denote each…
A: In this question we have to explain the difference between null and alternative hypothesis and also…
Q: Suppose the defendant in a particular judicial system is presumed guilty until proven innocent. What…
A: Given :
Q: You would like to see if college students get more than 90 minutes of physical activity a day (on…
A:
Q: Should you reject or fail to reject the null hypothesis? O Reject the null hypothesis O Fail to…
A: The table shows the number of friends for 3 kindergarteners up to 2nd grade.
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A: Claim is that the mean systolic blood pressure of CEOs of major corporation is less than 134 mm Hg.…
Q: If p- value is greater than alfa, the null hypothesis is not rejected. True O False
A: The p-value measures the probability of getting a more extreme value than the one you got from the…
Q: If the null hypothesis is not rejected at the 5% level of significance, then A it will never be…
A: Hypothesis is always rejected for p value less than alspha.
Q: What are the correct hypotheses for this test? The null hypothesis is Ho: The alternative hypothesis…
A: S.D is 5% we need to provide the null and the alternate hypothesis
Q: et the null hypothesis.
A: It is given that, When testing a hypothesis at a level of significance 0.10. From t-statistic, the…
Q: Discuss whether the following hypothesis is a good hypothesis (i.e., they are logical, testable,…
A: Introduction: It can be determined whether a hypothesis is good, by determining if it is logical,…
Q: What are the null and alternative hypotheses? Họ: | versus H,: (Type integers or decimals. Do not…
A: Given : Proportion of respondents who stated they talk to their pets on phone = 0.45 Sample size =…
Q: What is the null hypothesis H0 and the alternative hypothesis H1?
A: Here p=76% =76/100 =0.76 So null and alternative hypothesis is Null…
Q: Define the null hypothesis in mathematical terms and in words Define the alternative hypothesis in…
A: There are two types of hypotheses: one is the null hypothesis and the other is the alternative…
Q: If a researcher does not uncover sufficient evidence for a treatment effect in a hypothesis test,…
A: When , p<0.05 we reject the null hypothesis and conclude that there is not sufficient evidence…
Q: (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the…
A: The type I error is defined as the rejecting the null hypothesis when actually it is true. The type…
Q: Suppose that you want to perform a hypothesis test for a population mean, μ. a. Express the null…
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Q: A researchers claims 45% of couples have children. They conduct a hypothesis test and reject the…
A: Type I Error : Reject H0 when H0 is true.
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A:
Q: what the probabilty that it is actually true
A: Given, Level of Significance = 5% power (β) = 0.9
Q: As a general guideline, the research hypothesis should be stated as the O null hypothesis. tentative…
A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…
Q: In Malaysia legal system, a defendant is presumed innocent until proven guilty. Consider a null…
A: Consider a null hypothesis, H0, that a defendant is innocent an alternative hypothesis, H1, that the…
Q: What are the null hypothesis (H,) and the alternative hypothesis (H, ) that should be used for the…
A: Solution:
Q: What are the symbols associated with the null hypothesis and alternative hypothesis below: H0: pain…
A: According to the provided information, H0: pain is independent of hair color H1: pain is dependent…
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A: The hypotheses of the test will be- H0:μ is equal to 7.5H1:μ is not equal to 7.5 A Type-I error is…
Q: What are the Null and Alternative Hypothesis? Include Symbols.
A: Here we have to define the null and alternative hypothesis with their symbols.
Q: The p-value for a hypothesis test turns out to be 0.00956. At a 3% level of significance, what is…
A:
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A:
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- A manager of a large corporation recommends a $10,000 raise be given to keep a valuedsubordinate from moving to another company. What internal and external sources of datamight be used to decide whether such a salary increase is appropriate?To the Internal Revenue Service, the reasonableness of total itemized deductions depends on the taxpayer's adjusted gross income. Large deductions, which include charity and medical deductions, are more reasonable for taxpayers with large adjusted gross incomes. If a taxpayer claims larger than average itemized deductions for a given level of income, the chances of an IRS audit are increased. Data (in thousands of dollars) on adjusted gross income and the average or reasonable amount of itemized deductions follow. Adjusted Gross Income($1,000s) Itemized Deductions($1,000s) 22 9.6 27 9.6 32 10.1 48 11.1 65 11.5 85 19.7 120 23.5 (a) Develop a scatter diagram for these data with adjusted gross income as the independent variable. A scatter diagram has 7 points plotted on it. The horizontal axis ranges from 0 to 140 and is labeled: Adjusted Gross Income ($1,000s). The vertical axis ranges from 0 to 30 and is labeled: Itemized Deductions ($1,000s). The points are…To the Internal Revenue Service, the reasonableness of total itemized deductions depends on the taxpayer's adjusted gross income. Large deductions, which include charity and medical deductions, are more reasonable for taxpayers with large adjusted gross incomes. If a taxpayer claims larger than average itemized deductions for a given level of income, the chances of an IRS audit are increased. Data (in thousands of dollars) on adjusted gross income and the average or reasonable amount of itemized deductions follow. Adjusted Gross Income($1,000s) Itemized Deductions($1,000s) 22 9.6 27 9.6 32 10.1 48 11.1 65 13.5 85 19.7 120 27.5 (a) Develop a scatter diagram for these data with adjusted gross income as the independent variable. (b) Use the least squares method to develop the estimated regression equation that can be used to predict itemized deductions (in $1,000s) given the adjusted gross income (in $1,000s). (Round your numerical values to three decimal…
- Suppose Laura, a facilities manager at a health and wellness company, wants to estimate the difference in the average amount of time that men and women spend at the company's fitness centers each week. Laura randomly selects 15 adult male fitness center members from the membership database and then selects 15 adult female members from the database. Laura gathers data from the past month containing logged time at the fitness center for these members. She plans to use the data to estimate the difference in the time men and women spend per week at the fitness center. The sample statistics are summarized in the table. Population Populationdescription Population mean(unknown) Samplesize Sample mean(min) Sample standarddeviation (min) 11 male μ1 n=15 x¯1=137.7 s=51.7 22 female μ2 n=15 x¯2=114.6 s=34.2 df=24.283 The population standard deviations are unknown and unlikely to be equal, based on the sample data. Laura plans to use the two-sample ?-t-procedures to estimate the…Over the past 40 years, the percentage of homes in the United States with smoke detectors has risen steadily and has plateaued at about 96% as of 2015.† With this increase in the use of home smoke detectors, what has happened to the death rate from home fires? Suppose the following contains 17 years of data on the estimated percentage of homes with smoke detectors and the estimated home fire deaths per million of population. Percentage ofHomes withSmoke Detectors Home Fire Deathsper Millionof Population 0.52 22.8 0.69 20.7 0.76 17.2 0.78 20.4 0.79 19.3 0.84 18.8 0.83 17.5 0.87 16.1 0.88 13.5 0.90 14.3 0.92 14.2 0.94 12.9 0.95 10.8 0.96 10.8 0.97 10.1 0.96 8.3 0.96 8.0 (a) Do you expect a positive or negative relationship between smoke detector use and deaths from home fires? Why or why not? We would expect there would be a ---Select--- negative positive relationship between smoke detector use and deaths from home fires. As more households have…Southwestern Electronics has developed a new calculator that performs a series of functionsnot yet performed by any other calculator. The marketing department is planning todemonstrate this calculator to a group of potential customers, but it is worried about someinitial problems, which have resulted in 4 percent of the new calculators developingmathematical inconsistencies. The marketing VP is planning on randomly selecting a groupof calculators for this demonstration and is worried about the chances of selecting acalculator that could start malfunctioning. He believes that whether or not a calculatormalfunctions is a Bernoulli process, and he is convinced that the probability of a malfunctionis really about 0.04. Assuming that the VP selects exactly 50 calculators to use in thedemonstration, and using the Poisson distribution as an approximation of the binomial whatis the chance of getting at least two calculators malfunctioning?
- Determine whether the data are discrete or continuous. Number of phone calls received during one day at a poison control centerThe authors of a paper compared two different methods for measuring body fat percentage. One method uses ultrasound, and the other method uses X-ray technology. Body fat percentages using each of these methods for 16 athletes (a subset of the data given in a graph that appeared in the paper) are given in the accompanying table. You can assume that the 16 athletes who participated in this study are representative of the population of athletes. Athlete X-ray Ultrasound 1 5.00 4.50 2 15.00 11.75 3 9.25 9.00 4 12.00 11.75 5 17.25 17.00 6 29.50 27.50 7 5.50 6.50 8 6.00 6.75 9 8.00 8.75 10 16.50 17.50 11 9.25 9.50 12 11.00 12.00 13 12.00 12.25 14 14.00 15.50 15 17.00 18.00 16 18.00 18.25 Use these data to estimate the difference in mean body fat percentage measurement for the two methods. Use a confidence level of 95%. (Use ?d = ?X-ray − ?ultrasound. Round your answers to three decimal places.) , % Interpret the interval in…The authors of a paper compared two different methods for measuring body fat percentage. One method uses ultrasound, and the other method uses X-ray technology. Body fat percentages using each of these methods for 16 athletes (a subset of the data given in a graph that appeared in the paper) are given in the accompanying table. You can assume that the 16 athletes who participated in this study are representative of the population of athletes. Athlete X-ray Ultrasound 1 5.00 4.25 2 16.00 12.75 3 9.25 9.00 4 12.00 11.75 5 17.25 17.00 6 29.50 27.50 7 5.50 6.50 8 6.00 6.75 9 8.00 8.75 10 9.50 10.50 11 9.25 9.50 12 11.00 12.00 13 12.00 12.25 14 14.00 15.50 15 17.00 18.00 16 18.00 18.25 Use these data to estimate the difference in mean body fat percentage measurement for the two methods. Use a confidence level of 95%. (Use ?d = ?X-ray − ?ultrasound. Round your answers to three decimal places.) , % Interpret the interval in context.…
- The National Highway Association is studying the relationship between thenumberof bidders on a highway project and the winning (lowest) bid for the project. Ofparticular interest is whether the number of bidders increases or decreases the amountof the winning bid.The authors of a paper compared two different methods for measuring body fat percentage. One method uses ultrasound, and the other method uses X-ray technology. Body fat percentages using each of these methods for 16 athletes (a subset of the data given in a graph that appeared in the paper) are given in the accompanying table. You can assume that the 16 athletes who participated in this study are representative of the population of athletes. Athlete X-ray Ultrasound 1 5.00 4.25 2 12.00 8.75 3 9.25 9.00 4 12.00 11.75 5 17.25 17.00 6 29.50 27.50 7 5.50 6.50 8 6.00 6.75 9 8.00 8.75 10 9.50 10.50 11 9.25 9.50 12 11.00 12.00 13 12.00 12.25 14 14.00 15.50 15 17.00 18.00 16 18.00 18.25 Use these data to estimate the difference in mean body fat percentage measurement for the two methods. Use a confidence level of 95%. (Use ?d = ?X-ray − ?ultrasound. Round your answers to three decimal places.) , % Interpret the interval in…A Gallup survey showed that in March 2011 , 8 of every 25 employers in the United States were adding more workers to their workforce, 9 of 50 were reducing their workforce, and 1 of 2 were keeping it the same. In a metropolitan area there are 1250 employers and of those who will hire, they will hire an average of seven new employees. If the employers who were cutting their workforce in that area were planning on letting go an average of nine workers, what would the net change in jobs for the area be? This metropolitan area would see a ▼net decrease or increase of jobs.