One research shows that of patients suffering from a coronavirus 5% die of it. What is the percentage that of 4 randomly selected patients, 2 will recover? Select one: A. 0.0000338 B. 0.00338 O C. 0.0000312 D. 0.00312 E. None

Q: One sample has n = 8 and SS = 168. A second sample has n = 6 and SS = 126. What is the pooled…

A:

Q: A study of college students in the city of Pemblington found that  8% had been victims of violent…

A: The parameter tell us about the the population where as statistics tell us about the sample. The…

Q: Q1) The percentage of NON Defective production is 10%. If a sample of 5 lap tops randomly been drawn…

A: Let, X = number of defective laptops. p= probability of defective = (1-10%)=(1-.10)=0.9 n=5

Q: Find the corresponding z-score for a sample of n = 4  and M = 38 taken from a population with a mean…

A: Given,Sample size (n)=4Sample mean (M)=38Population mean(μ) =40Standard deviation (σ)=8

Q: Suppose that three drugs used to reduce cholesterol are compared in a randomized experiment in which…

A: Excel Procedure: Enter the data for 1, 2, 3 in Excel sheet>Go to Data Menu>Click on Data…

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A: Given that n =30 and p=0.20.

Q: A U.S. Food Survey showed that Americans routinely eat beef in their diet. Suppose that in a study…

A: Given information   Illinois Texas µ µ1 µ2 n 49 64 x̅ 54.1 lb 60.4…

Q: S. The effectiveness of a flu vaccine is tested by treating one group of subjects with the vaccine…

A: Here use 2 proportion z test

Q: To build a 99% CI for the mean of a population, you take a random sample and find these values: 22.2…

A:

Q: In a 4-week study about the effectiveness of Do you Feel Better? using magnetic insoles to treat…

A: The total n1=55 subjects wore magnetic insoles out of which only x1=15 subjects feel better. And…

Q: A population of N = 200 scores has u = 40 and o = 4. What is the population variance? O 33 O 8 0 9 O…

A:

Q: The US National Survey on Drug Use and Health reports that 4.8% of persons 12 and older regu- larly…

A: p=0.048n=900x=54p⏞=xn=0.06 d) The test statistics is…

Q: 3. For a population with µ = 40 and o = 8, what is the z-score corresponding to X = 34?

A:

Q: The following table cross-classifies pregnant women in the study by their body mass index (BMI) at…

A: The number of women with BMI greater than 35 delivers pre-term is 120.

Q: To calculate the of an event A, we take the proportion of the number of times A was observed over…

A: Classical probability: The classical probability measures the likelihood of an event by assuming…

Q: In an independent samples design, two samples have the same sample size. The first sample has n = 6…

A: Obtain the value of the pooled variance for the two samples. The value of the pooled variance for…

Q: If a researcher reported for a single-sample t-test that t(17) = 2.90, p<.02, how many subjects…

A: It is given that the test is single-sample t test and the degrees of freedom is 17.

Q: If a sample of n = 4 scores is obtained from a normal population with µ = 70 and σ = 12, what is the…

A: Sample size, n = 4 Mean = 70 Standard deviation = 12 Sample mean = 69 (Raw score)

Q: The US National Survey on Drug Use and Health reports that 4.8% of persons 12 and older regu- larly…

A: Note: " Since you have asked multiple sub-parts, we will solve the first three sub-parts for you. If…

Q: For the case where the population ratio to population is p = 0.08, what is the probability of…

A: It is an important part of statistics. It is widely used.

Q: d. The probability that the child will be between 5.27 and 5.67 years old is e. If such a child is…

A: Given Information: Age of children in kindergarten on the first day of school is uniformly…

Q: A researcher reported a related-measures t statistic with df = 40. How many pairs of subjects…

A: Answer: Given that, A researcher reported a related-measures t-statistic with degrees of freedom =…

Q: For a normal population with µ = 40 and σ = 15, find each of the following: p (X > 45) p…

A:

Q: For a population with μ = 80 and σ = 6,what is the z-score corresponding to X = 68?

A:

Q: An independent-measures experiment with three treatment conditions has a sample of n = 10 scores in…

A: Given: An independent measures having n=10 scores in which the conditions are T1 = T2 = T3. To…

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A:

Q: If a sample of n = 4 scores is obtained from a normal population with µ = 70 and σ = 12, what is the…

A:

Q: help me fix a please !!

A: State the hypotheses. That is, the population proportion of the people who answered “Yes” is the…

Q: In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been…

A: a) From the given information, the number of men had never been screened is 40 and the sample size…

Q: If a researcher reports a t-statistic with df = 18, how many individual subjects participated in the…

A: Given: Df = 18

Q: a. Obtain the cdf of X. b. What is P(X ≤ .5)? c. Using the cdf from (a), what is P(.25 < X ≤ .5)?…

A: we have the pdf, f(x) = 90x8(1-x)= 90(x8-x9) for 0&lt;x&lt;1 we want to find, a. Obtain the cdf of…

Q: In a sample with M = 40 and s = 8, what is the z-score corresponding to X = 38? %3D

A: Solution: 7. From the given information, M=40 and s=8.

Q: Two independent samples are examined and the following are found: n1 = 20, M1 = 30, SS1 = 400, n2 =…

A:

Q: The following table shows the results of a screening test hypothesized to identify persons at risk…

A: Answer: Using the given table, we have,

Q: As a researcher for an environmental agency, you have been asked to determine if the air quality in…

A: Given : x1 = 24.57S1 = 14.56x2 =33S2 = 18.80

Q: If all other values are held constant, what happens to the value of t when sample size increases ?

A: The formula to calculate t value (test statistic) can be written as:

Q: Is there a significant difference in political ideology? (On this scale, 10 means "very…

A: Given data: Let X denotes the data regarding freshman. Number of freshman included in the sample,…

Q: A soft drink manufacturer wants to determine the proportion of its soda cans that meet quality…

A: The sample size n= 2000 cans. He finds that 99.7% meet the quality standards.

Q: In testing a certain kind or truck tire over rugged terrain, it is found that 40% of the trucks fail…

A: Solution: Let X be the random variable that the truck fails to complete the test run without a…

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

A: One sample proportion test is used to compare the proportion of values in given sample of data to…

Q: A reader wrote in to the “Ask Marilyn” column in Parade magazine to say that his grandfather told…

A: The null hypothesis is a simple statement about the value of the population parameter which is…

Q: in which the conditions of the f the sample che study has ever been carrie pnd

A: (a and b), but not (c and d)

Q: An experiment compares two treatment conditions with a sample of n = 20 in each treatment. If the…

A: Solution:-  We have given that  Sample size n = 20 and two treatment.

Q: In a certain county in 2013, it was thought that 50% of men 50 years old or older had never been…

A: We have a random sample of 50 men and 20 of them had never been screened Also it was thought that…

Q: One sample has a sample size of n = 8 and SS = 168. A second sample has a sample size of n = 6 and…

A: given: The pooled variance for these two samples is given by

Q: An independent-measures experiment with three treatment conditions has a sample of n = 10 scores in…

A: An independent-measures experiment with three treatment conditions has a sample of n = 10 scores in…

Q: As a researcher for an environmental agency, you have been asked to determine if the air quality in…

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

Q: A poultry farmer supplies eggs to major supermarkets in Accra for sale to the general public. He…

A: The null and alternative hypotheses are stated below: H0: P1= 2/3and P2= 1/3. Ha: At least one Pi is…

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.