under what circumstances we should use these statistical methods:  Z-Test  One sample T-test Dependent T-test Independent 2-sample T-test

Q: Find the area of the shaded region under the standard normal curve.

A: We will use Standard Normal table to find the required area.

Q: Please use the accompanying Excel data set or accompanying Text file data set when completing the…

A: Given: n = 21 Formula Used: The equation of regression line is: Y = a + bX Slope b =…

Q: classify the 2 given samples as independent or dependent. Sample 1: The number of hours 30 kids…

A: If happening of one event does not affect the other event, then the two events are said to be…

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample…

A: T distribution has used to calculate confidence interval.

Q: 1. The bank counter at Universitas Islam Indonesia will give the service to 0, 1, 2, 3, 4, or 5 or…

A: Here Given  the bank counter at Universities Islam Indonesia will give Service to number of…

Q: In a 2009 survey by I-Pension LLC, adults with annual household incomes of $50,000 to $125,000 were…

A:

Q: a garden store has the following miscellaneous flower bulbs in a basket:  6 amaryllis 5 daffodils…

A:

Q: QUESTION 1 COVID-19 virus has been categorized as a pandemic in March 2020 by the World Health…

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

Q: ction is independent of having Cancer giver between the variables Asbestos, Smoking,

A: Bayesian Network Asbestos used in construction causes lot of health issues One among them is cancer…

Q: Use the following information to answer the following question. A bag contains 12 red marbles, 15…

A: Given info: A bag contains 12 red marbles, 15 yellow marbles, 10 green marbles, and 3 black marbles.…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.10. H₁:1 = 2 Ηα: μι # με…

A: Given: n1 = 38 n2 = 39 α = 0.10 Formula Used: Test-statistic t = X1 - X2sp1n1+1n2 sp =…

Q: Suppose exam grades were recorded for 20 students in the class, but one of the grades is no longer…

A: Given Average of 20 student= 80 Average of 19 student= 82

Q: A psychologist would like to know whether the change in seasons has any consistent effect on…

A: Use the Excel And Perform the One way anova Followings are the steps to perform the One way anova…

Q: B. Refer to the following data from a Cohort study: With Lung Cancer 500 900 1,400 Smoker Non-smoker…

A: As per the guidlines we are allowed to solve only one question please put the other question…

Q: A left-tailed z-test found a test statistic of z = -1.99. At a 5% level of significance, what would…

A: Hypothesis test has two statements. They are null and alternate hypothesis. Null hypothesis explain…

Q: 2. A manufacturing process that produces electron tubes is known to have a 10% defective rate.…

A: (a)   Obtain the probability that no more than two defectives are found.   The probability that no…

Q: If We can assert with 95% that the maximum error is 0.05 and p= 0.2 ,find the sample size..

A:

Q: Calculate the incidence rate of Lupus in men older than 45 years old per 1000 population? Calculate…

A: Using the given table we have to Calculate the incidence rate of Lupus in men older than 45 years…

Q: No.of absences, x | 0 1 2 3 4 5 6 7 8 9

A: Let, x(Number of absences) = Independent variable y (Final grade) = Dependent variable

Q: A researcher would like to test the claim that the proportion of middle-aged smokers with a lung…

A: Claim of the study;A researcher would like to test the claim that the proportion of middle-aged…

Q: What conditions are necessary in order to use a t​-test to test the differences between two…

A: The objective is to identify the conditions that are necessary to use a t-test to test the…

Q: Find the area in a t-distribution below  -2.3 if the sample has size n=8. Round your answer to…

A:

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

A:

Q: A physician wants to see if there was a difference in the average smokers' daily cigarette…

A: To find: What is the correct p-value?

Q: Q6. Regarding Normal Approximation to the Binomial, one rule states that the Normal Approximation…

A: Let there are n trials and each having two outcomes - Success and Failure. The trials are…

Q: Η 0.1 0.4 11 0.25 C

A:

Q: CLT

A: Given: Population = Lizards Population mean = μ = 3.1 Population Standard Deviation = σ = 0.8 Sample…

Q: subjects.

A:

Q: 0.65 Determine of the X² test Statistic (b) the degrees d) test the hypothesis at the at = 0.05…

A: Categories Observed A 38 B 39 C 42 D 41

Q: QUESTION 2 An environmentalist wanted to determine if the mean acidity of rain differed among Ipoh,…

A: Given: Total sample (N)=18sample in each group(n)=6all total  ∑xii=1N=30.11+26.99+33=90.1total of…

Q: (a) State the null and alternative hypothesis (b) Check conditions for this test (c) Calculate the…

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

Q: The following output models the factors that influence the price of a particular good. Calculate the…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: What is the confidence interval for the population mean u? <<(Round to one decimal place as needed.)

A: Given: The number of observations, n =12 Confidence level=90% 7 9 3 9 6 6 7 8 7…

Q: Reuben is a human resources executive for a technology company. He is deciding between two types of…

A: From the provided information,

Q: At one college, GPA's have a distribution that is unimodal and symmetric with a mean of 2.6 and a…

A: Since the distribution is unimodal and symmetric with a mean hence it is normal distribution with…

Q: Find the minimum sample size needed to estimate the percentage of managers who have a cat. Use a…

A: Given For 99.8% CI is 2.8782 P=0.5 Margin of error=0.06

Q: A​ state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Consider p1 as the proportion of adults who are smokers in state A and p2 as the proportion of…

Q: Round your answer to three decimal places. r = i

A: Use the Excel and Calculate the Correlation  Followings are the Steps to Calculate Correlation 1)…

Q: Consider the probability distribution shown below. x 0 1 2 P(x) 0.05 0.30 0.65 Compute the expected…

A: Given,     X    0    1    2      P(X)    0.05      0.30    0.65

Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean?

A:

Q: Consider the following model between net international reserves (NIR) and foreign liabilities (fl)…

A: Regression analysis

Q: Assume that a sample is used to estimate a population mean μμ. Find the margin of error M.E. that…

A:

Q: A researcher asked 35 participants (N = 35) to rate their level of life satisfaction on a 7-point…

A: Given that :- A researcher asked 35 participants (N = 35) to rate their level of life satisfaction…

Q: QUESTION 4 (LINEAR REGRESSION) Based on the image attached, shows the results of one data…

A: X:24,35,64,20,33,27,42,41,22,50,36,31  Y:90,65,30,60,60,80,45,45,80,35,50,45

Q: What is the​ p-value if, in a​ two-tail hypothesis​ test, ZSTAT=+1.29​?   Click here to view page 1…

A: GivenTest is two-tailed hypothesis testTest statistic(ZSTAT)=+1.29

Q: From a random sample of 1000 Americans, it was discovered that 920 of them lived in neighborhoods…

A: Givensample size(n)=1000x=920

Q: Above answer is incorrect.  A population of values has a normal distribution with μ=169μ=169 and…

A: We have given that Mean(µ) = 169Standard deviations (σ) = 72.9 Sample size (n) = 10X ~ N (µ, σ )=…

Q: Summary statistics for paired data are given. nd=25n x¯d=31 d=8.1 Use the sample information and…

A: Given Sample size=25 Sample mean=31 standard deviation=8.1

Q: ue. Round the answer to at least four decima

A: Given : x¯=22.8σ=10.0μ=19.8n=101α=0.10

Q: What is the variance of the small DATA: 7, 13, 5, 9, 16 a. 4.47

A: The data is given as follows 7 13 5 9 16