A weatherman stated that the average temperature during july in a certain city is less than 40 degrees. the correct hypothesis is

Q: A building manager in interested in installing a sprinkler system that is designed to go off in the…

A: let us first understand what is type I error and type II error: type I error is the rejecting null…

Q: Is it one tailed, or two tailed? I thought two because the hypothesis is non-directional

A:

Q: A researcher finds that talking on the phone while driving does not distract you from the road but…

A: type 1 error: reject the null hypothesis when it is true type 2 error: fail to reject the null…

Q: Jeffrey thinks that students on the baseball team who drink Sporty brand sports drink score more…

A: In the given problem,  Jeffrey thinks that students on the baseball team who drink Sporty brand…

Q: If the ƞ2 in an experiment is 0.6, give any possible value of ω2.

A: Givenη2=0.6The percentage of variance in the dependent variable accounted by the independent…

Q: To decide whether two variables of a population are associated, we usually need to resort to…

A:

Q: A medical researcher says that less than 85% of adults in a certain country think that healthy…

A: For the  given data Perform Z test for one proportion

Q: Assume that half the population is vegetarian so that the chance of an individual being a vegetarian…

A:

Q: Ms. Fernandez believes that the mean income of teachers is now more than Php 45,000 per month. Which…

A: We have to find null and alternative hypothesis..

Q: If my p-value is 0.062 should I reject it and support my claim?

A: Basic: Rejection or acceptance of null hypothesis  is totally depending  on p values and…

Q: A medical researcher says that less than 74​%of adults in a certain country think that healthy…

A: It is given that n is 600 and p hat is 0.71.

Q: n analyst stated that the average amount of money spent on New Year gifts for friends is above…

A:

Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A:

Q: What is the difference between single and double blinding?

A:

Q: According to a recent report, 21% of all adults routinely skip breakfast. A researcher believes this…

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Q: A research center claims that 26% of adults in a certain country would travel into space on a…

A:

Q: In a big city 325 men out of 600 men were found to be smokers. Does this information support the…

A: We have given that Sample size n = 600 Favorable cases x = 325 Sample proportion p^=x/n = 0.5417

Q: The Range of recorded covid-19 cases during 4 week in Oman is

A: Range is the difference between lowest and highest values .  It's formula is given as : Range = max…

Q: A research center claims that 30​% of adults in a certain country would travel into space on a…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts(claim,…

Q: construct a 95% C.I. for the actual; percentage of shoppers who live more than 15 miles from that…

A: The sample size is n = 200 Proportion of shoppers who live more than 15 miles from that center in…

Q: An education researcher claims that 57​% of college students work​ year-round. In a random sample of…

A: Given, The sample proportion is, The null and alternative hypothesis is:

Q: A meteorologist stated that the average temperature during July in Chattanooga was 80 degrees. A…

A: Given  the average temperature during July in Chattanooga was 80 degrees. A sample of July…

Q: A researcher claims that the percentage of voters that favor voting via absentee ballot is 35%.…

A: It is given that the researcher claims that the percentage of voters that favor voting via absentee…

Q: Write down the steps for testing of hypothesis.

A: The hypothesis testing is used for making inferences about the population based on the sample data.

Q: A TWISTER spinner has four outcomes; red, blue, yellow, green. Tim believes that the proportion…

A:

Q: Is this an example of Simpson's paradox? Explain.

A: Simpson’s paradox: Interpretations are obtained from more than two single cross tabulations and that…

Q: . Suppose you were taking a one-day business trip to San Juan. What is the probability that it will…

A: San Juan experienced days of measurable precipitation = 127 Phoenix Arizona experienced days…

Q: Suppose that your friend sees the results from question 4 and concludes that heavier drinking causes…

A: Correlation between two variables measure the strength and direction between two variables. It…

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A: solution

Q: Suppose the locations of the cars are not necessarily mu- tually independent. What is the expected…

A: It is given that P(Zone B) =0.2 and P(Zone C) =0.1.

Q: A ping pong ball is drawn at random from an urn consisting of balls numbered 4 through 9. A player…

A:

Q: Suppose that an examination was hard and most students received extremely low grade on it. This is…

A:

Q: A research center claims that 30​% of adults in a certain country would travel into space on a…

A:

Q: A chi-square test is conducted to determine if a standard 6-sided die is weighted. If the die is to…

A: A standard 6 sided die is tossed randomly.

Q: Some people believes that the mean income of Pharmacists is now more than $65 thousand per year.…

A: We know that the Null hypothesis(H0) means no difference i.e. it always comes with an equal sign…

Q: A student pursuing a degree in English as a second language believes the proportion female factory…

A: Given Information: Female: Sample size (n) = 313 Number of female factory workers who could not…

Q: Is the following a non-directional (two tailed) or directional (one tailed) hypothesis?  There are…

A:

Q: What is the purpose of testing whether ᵝ1=0? If we reject ᵝ1=0, does it imply a good fit?

A:

Q: A research center claims that 24​% of adults in a certain country would travel into space on a…

A: Hypothesized Proportion, p = 0.24 : A research center claims that 24​% of adults in a certain…

Q: Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in…

A: According to guidelines we solve first question only when given questions are different.

Q: A farmer irrigates a circular field with a radius of 500 yd. If he plants a 90 degree sector of that…

A:

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A: Given,sample size(n)=400sample proportion(p^)=0.84α=0.10

Q: A research center claims that at least 31​% of adults in a certain country think that their taxes…

A:

Q: Suppose "Naturally Gassy" magazine claims that 35% A hypothesis test is to be performed to determine…

A: Given information, p^=47%=0.47n=60p=35%=0.35

Q: A medical researcher says that less than 79% of adults in a certain country think that healthy…

A:

Q: A research center claims that 28% of adults in a certain country would travel into space on a…

A: Given n=sample size=800 p^=sample proportion=0.30

Q: A statistics instructor believes that more than 20% of Evergreen Valley College (EVC) students…

A: Given: n= 84 ,x= 11.0 p= 0.20 Need to find Alternative hypothesis condition??

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: Given data sample size, n = 1200 population proportion,p= 0.3 Significance level,…

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.