A sleep therapist finds that prescribing high doses of benzodiazepine to patients suffering from chronic insomnia lowers their rates of sleeplessness by exactly 78.54%. Is this specific prediction warranted? Why or why not?

Q: A study wishes to see whether attending prekindergarden affects a child's likelihood to graduate…

A: We want to test the hypothesis Given  X1=215, n1=250 X2=260, n2=340

Q: poll in June 2020 found that 81% of American parents believe that virtual learning instead of…

A: Given data number of success , x= 822.0 sample size, n = 1081 population…

Q: Describe an experiment in which a binomial distribution could be used, and explain why the binomial…

A: We have to give an example of binomial distribution and give reason why it is following binomial…

Q: 2) A recent online poll posed the question "Should female athletes be paid the same as men for the…

A: Answer: Yes. We can trust the result.

Q: (a)State the hypotheses that can be used to test for a significant difference between the population…

A: Given: p1^=4101000p2^=4201200

Q: Nationally, the proportion of red cars on the road is 0.12. A statistically-minded fan of the…

A: The following hypothesis can be formed

Q: A researcher administers a treatment to a sample from a population with a mean of µ = 60. If the…

A: From the provided information, The researcher administers a treatment to a sample from a population…

Q: According to a Gallup survey two years ago, 32% of American households use a computer or online…

A: From the provided information, Sample size (n) = 85 Sample proportion (p̂) = 0.36 Level of…

Q: The article "Well-Fed Crickets Bowl Maidens Over"t reported that female field crickets are attracted…

A: Confidence interval is the interval that is proposed to estimate an unknown parameter. The boundary…

Q: According to a certain government agency for a large​ country, the proportion of fatal traffic…

A: Solution: Given information: n= 110 Sample size of traffic fatalities x= 49 traffic fatalities…

Q: In the 5 models above, which variable, by itself, explains the greatest proportion of total variance…

A: Predictor P for variable X3 is larger among all other variables. Hence variable X3 explains that…

Q: "The US Centers for Disease Control and Prevention said about 72 million Americans-nearly one out of…

A: We use ANOVA to test more than two means while t-test can be used in case of only two means.

Q: Calculate the predicted self-control score for a person living in a good neighborhood who is 18…

A:

Q: In a survey of 1000 adult Americans, 45.9% indicated that they were somewhat interested or very…

A:

Q: If the alternative hypothesis states that alcohol affects short-term memory, the null hypothesis…

A: The given alternative hypothesis is that the alcohol affects short-term memory.

Q: Forty new employees hired at the same time are randomly divided into two groups. One group receives…

A: Experimental Study: If some treatments are applied on the individuals in order to observe the…

Q: kindly assist,   An epidemiologist who is working in Capricorn Department of Health investigated…

A: We have given that  Sample size n =10000 Favorable cases x =275 Sample proportion p^=x/n  =275/10000…

Q: 1) State the null and alternative hypotheses using the appropriate notation. 2) Calculate the test…

A: a) The test wants to see if the population proportion differs between the two provinces. Thus, we…

Q: In a survey of 1,000 adult Americans, 46.3% indicated that they were somewhat interested or very…

A: a) State the Null and Alternative Hypothesis. Null Hypothesis: Proportion of all adult Americans who…

Q: Could owning a cat as a child be related to mental illness later in life? Toxoplasmosis is a disease…

A: Given : x1 = 136x2 = 220n1 = 262n2 = 522

Q: Some studies have suggested that a nightly glass of wine may not only take the edge off a day but…

A: (a) Step-by-step procedure to obtain scatter plot using Excel: Select the data of x and Select…

Q: A young professor found out from a senior professor that psychology students in St. Alex University…

A: Given information: μ=1.50x¯=1.35s=0.50n=9α=0.10

Q: A Gallup poll in 2010 asked 1,019 adults in the U.S. about their belief in the origin of humans…

A: e). The hypothesis to be tested here is- H0:The population follows the 2001 distribution.H1: The…

Q: Will improving customer service result in higher stock prices for the companies providing the better…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: A random sample of voters found that 180 out of 320 people were in favor of a gas tax. Election…

A: Given Random sample is 180 out of 320 voters are in support of tax. Total 36000 people voted in…

Q: (h) What is the value of the sample statistic?

A: p1 = 0.324 p2 = 0.182p-value = 0.002

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: The sample proportion is, The null hypothesis is, The alternative hypothesis is, Significance…

Q: A certain financial services company uses surveys of adults age 18 and older to determine if…

A: a. Null Hypothesis: H0:p1=p2 Alternative Hypothesis: Ha:p1-p2≠0 Test Statistic: From the given…

Q: The predicted outcome of the 2020 US election was 5/9 in favour of Joe Biden. What is the average…

A: Here we want to Know average information content of this process.

Q: A relative risk of 5.67 indicates that the group of individuals in a study exposed to the particular…

A: Given data: A relative risk of 5.67 indicates that the group of individuals in a study exposed to…

Q: How does having leather seats affect the expected price of the car, controlling for the mileage and…

A: Let us construct the regression equation by using the coefficient. price = 6953 - 0.0841*Mileage +…

Q: well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting…

A:

Q: Do well-rounded people get fewer colds? A study on the Chronicle of Higher Education was conducted…

A: Obtain the 99% confidence interval for the difference in the two population proportions. The 99%…

Q: A certain financial services company uses surveys of adults age 18 and older to determine if…

A: Here 2 proportion of Z test statistics is applicable.   ===========================

Q: who is more likely to attend both activities?

A: here use concept of independent event if A and B independent events then p(A and B ) = p(A).p(B)

Q: A certain large asset management company is thought to have a high value client base of 35%. High…

A: In the given situation, Null Hypothesis: H0: p=0.35 Alternative Hypothesis: H1: p>0.35 Given that…

Q: Cite an example of a binomial experiment that may be related to *SCHOOL* and justify why it can be…

A: Binomial distribution: The binomial distribution gives the probability of number of successes out of…

Q: According to the GSS 2018 dataset, 51% of 218 college graduates reported being interested in…

A:

Q: A researcher has found a strong relationship between level of education and income and concludes…

A: Introduction: The error in the conclusion must be identified.

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

A:

Q: At any age, about 20% of American adults participate in physical conditioning activities at least…

A:

Q: n a survey of 1000 adult Americans, 45.7% indicated that they were somewhat interested or very…

A: Solution: Given information: n= 1000  Sample size  p^= 0.457  Sample proportion p= 0.50 Population…

Q: old is p2, what is the null hypothesis for a test to determine if the proportion of the population…

A: A null hypothesis is a statement about an unknown parameter that is framed either from existing…

Q: Low-income students tend to have lower attendance rates and lower math test scores than their…

A: Given: The sample of students in a local school district is collected. It is observed that the low -…

Q: A department store will place a sale item in a special display for a one-day sale. Previous…

A: Given datan=2027p=29%

Q: So far, Walter has scores of 18, 17, 19, and 21 points for the first four science quizzes. What does…

A: Walter scores of first four science quizzes is 18, 17, 19 and 21 points.

Q: If the data analyst hypothesizes that grocery sales are higher when payment is made using credit…

A: Null hypothesis: The hypothesis of no difference is called as null hypothesis. Alternative…

Q: A polling company reported that 59% of 1013 surveyed adults said that rising gas prices

A: (a). Find the expected value: The size of the sample taken from the population is n = 1013. It is…

Q: Adding computerized medical images to a database promises to provide great resources for physicians.…

A:

Q: "The US Centers for Disease Control and Prevention said about 72 million Americans-nearly one out of…

A: Type I error is the probability of rejecting the null hypothesis when it is actually true.

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.