when is the significance level determined

Q: What are the explanatory variable and response variable for this relationship?

A: Given that among a group of 138 customers aged 14-23 who send more text messages tend to use a…

Q: What statistical analysis correctly analyzes the independent measure ( also known as in between…

A: Here we can say that for independent measures we use t-test for one sample and t-test for two…

Q: Carry out the statistical test and state your conclusions.

A: 5) The null hypothesis is a simple statement about the value of the population parameter which is…

Q: What statistical test would you use to compare three different groups on some dependent variable?

A: Given : What statistical test would you use to compare three different groups on some dependent…

Q: Test the claim that the proportion of people who own cats is larger than 90% at the 0.01…

A: Given claim: The proportion of people who own cats is larger than 90%. Null Hypothesis: H0:…

Q: What  statistical test( from the data)  should be used to check whether people choose each type of…

A: Chi-square goodness of fit test: The Chi-square goodness of fit test is used to test whether or not…

Q: additionally how would you find the: test statistic & p-value

A: The claim is that mean lead concentration is less than 19 μg/g Null hypothesis: H0 : µ=9 μg/g…

Q: Test the claim that the proportion of people who own cats is larger than 20% at the 0.05…

A: Claim : Proportion of people who own cats is larger than 20% = 0.2 Sample size is n = 300 Sample…

Q: company scientist is testing whether the mean level of a toxin in a newly created children’s…

A: 1] n= 5000  2] μ0=5 mg

Q: (a) Show that 2X is also an unbiased estimator of B. the properties of sample mean,

A: Given:  Random variable x with mean (beta/2)  Then to show that "2*xbar" be  the unbiased estimate…

Q: Test the claim that the proportion of people who own cats is larger than 50% at the 0.025…

A: Let p denotes the population proportion of people who owns cats. The claim of the test is that the…

Q: What does The level of significance spotlights?

A: Level of significance is used in hypothesis testing. It is defined as the Type I error. The symbol…

Q: Test the claim that the proportion of men who own cats is larger than 50% at the .025 significance…

A: Given that  Claim :  The proportion of men who owns cats is larger than 50%  Hypothesized proportion…

Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

A:

Q: Test the claim that the proportion of men who own cats is smaller than the proportion of women who…

A: Given Information: Men: Sample size n1=60 Sample proportion p^1=0.45 Women: Sample size n2=40 Sample…

Q: Test the claim that the mean GPA of night students is larger than 2.8 at the 0.05 significance…

A: Claim : The mean GPA of night students is larger than 2.8 Sample size n = 35 Sample mean M = 2.81…

Q: Explain Misconceptions about significance testing?

A: Misconceptions about significance testing is, The probability value is defined as the probability…

Q: Is “how long it takes to correctly solve the puzzle” an explanatory variable or response variable?…

A: The variable that explains the expected cause, i.e., in other words, the variable that explains the…

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A: The table shows the amounts of arsenic in samples of brown rice from three different states.

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A:

Q: Interpret the test hypothesis either reject or not. And, how about the significant level?

A: Answer: From the given output, Test statistic = 2329.367 P-value = 0.0000 As p-value < 0.05, we…

Q: Test the claim that the mean GPA of Orange Coast students is larger than the mean GPA of Coastline…

A: Given, we assume O for orange coast students; nO = 25 xO = 3.29 sO = 0.03 we assume C for coastline…

Q: Use a 0.05 significance level to test the claim that cans of regular Coke and diet Coke have the…

A: It is given that the sample statistics for the regular coke and diet coke.

Q: The manager of the Postal Services claims that 98 percent of their mail are delivered on time. He…

A:

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

A: Given Information :   344 of the 618 freshmen psychology majors from a recent study changed their…

Q: Use the stat crunch data and determine if the mean quiz score is higher for those to take the quiz…

A: It is given that, the sample size n is 10.

Q: Suppose you want to test the claim that a population mean equals 38.  State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A: There are 3 independent samples which are Arkansas, California and Texas. We have to test whether…

Q: Do a significance test for a specific comparison?

A:

Q: What is the discrimination coefficient?

A: Discrimination coefficient

Q: A researcher assesses eye color for a sample of n = 50 people. Which measure of central tendency…

A: Here, the researcher assesses eye color for a sample of 50 people.

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A:

Q: Explain why the use of a level of significance of 5% is not best in all circumstances.

A: There are two types of error, which are as follows Type I : Reject the null hypothesis when it is…

Q: 1. Aresearcher wanted to know if there is a relationship between level of anxiety students have and…

A: the hypothesis for correlation test is  H0: there is no correlation between the level of anxiety…

Q: Assume you are using a significance level of a = 0.05| to test the

A: As given,  α = 0.05 We have to test the claim: µ < 20  Sample size ( n ) = 33 µ = 14 and σ = 8…

Q: What are the assumptions when you use a Z score?

A:

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

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

Q: If it noted that a significance levels are typically set at 0.05 (most common) and 0.01. Can you…

A: The significance level in hypothesis testing helps in rejecting or accepting the null hypothesis in…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25…

A: The provided information are:

Q: 5% is a very common significance level for significance tests, but it Is arbitrary

A: Level of significance helps researcher to make decision about the null hypothesis.

Q: Test the claim that the proportion of men who own cats is significantly different than the…

A: Given that Claim : Proportion of men who own cats is significantly different than the proportion…

Q: What is the relation between the centralizer and normalizer?

A: Centralizer of an element :-…

Q: what is the p value if the test static is 1.319 and the significance level is 0.01?

A: Testing of Hypothesis: Testing of hypothesis is a rule which, when the sample values have been…

Q: Using a significance level of α = 0.05, state your conclusion in terms of H0.?

A: According to the provided information, the level of the significance level is 0.05. The level of…

Q: claim that the mean IQ score of people With low blood lead levels is higher than the mean IQ score…

A: Step 1: The claim that the mean IQ score of people with low blood lead levels is higher than mean IQ…

Q: 4. What is the mean of X, (X) and Y; (Y) respectively? 5. Choose the best set of parameters and…

A:

Q: A clinical psychologist took a sample of four people from the population of people with anxiety…

A:

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A: There are 3 independent samples which are Arkansas, California and Texas. We have to test whether…

Q: The number of text messages sent and the number of phone calls made in a sample of 100 students

A: We know that the A variable that explains or affect the other variable is known as an explanatory…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.