It is easier to reject the null hypothesis if the researcher uses a smaller alpha (α) level. choose True or False?

Q: If other factors are held constant, increasing the size of the sample increases thelikelihood of…

A: Identify the correct option.   The correct option is identified below as follows:   Test Statistic:…

Q: A biologist is studying the effect of exposure to radiation in mice. She hypothesizes that the rate…

A: From the provided information, One out of every 10 mice that age has cancer that is p = 0.10 Sample…

Q: Assume them to be a random sample from a normal population. Perform a hypothesis test at alpha =…

A: Given:  n = 10 variance, σ2 = 0.02 α = 0.05

Q: Assume them to be a random sample from a normal population. Perform a hypothesis test at alpha =…

A: It is given that Sample size n = 10 Level of significance = 0.05 Test is that whether the variance…

Q: Researchers at the University of Boston's Children's Hospital and Harvard Medical School analyzed…

A: a null hypothesis of H0: no cancer is present and an alternative hypothesis of Ha: cancer is…

Q: when we will be reject the NULL HYPOTHESIS on the basis of

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given Mean=1.9 Variance=0.0036

Q: Why would you use a low alpha? To minimize the probability to make a Type I error To minimize the…

A:

Q: If I am conducting a one-tailed z test and my risk is 1% what should my critical value be?

A: From the provided information, The level of significance (α) = 1% that is 0.01 The test is one…

Q: If the p-value is greater than alpha, we will. reject the null hypothesis and accept the alternative…

A: If the P-value is greater than alpha, we do not have sufficient evidence to reject the null…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: Lisa wants to determine if graduates from her collegeearn different incomes than do graduates from…

A: Let μ denotes the population mean income of the graduates from Lisa's college. The average income is…

Q: A doctor believes that the fruit and vegetable intake of Northern adolescents is different from the…

A: Know that Null hypothesis is denoted H0. And Alternative hypothesis is denoted H1. NOTE:- According…

Q: Assume that MLR1-6 hold. For a two-sided alternative hypothesis test, we can say that the…

A: Assume that MLR1-6 hold. Here  two-sided alternative hypothesis test.

Q: The records of a casualty Insurance company show that, in the past, its clients have had a mean of…

A:

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Consider that σ2 is the population variance of auto accidents per day for the clients.

Q: ds of a casualty insurance company show that, in the past, its clients have had a mean of 1.7 auto…

A: Here it is given that- Mean (μ) = 1.7 Variance (δ2) = 0.0036

Q: What is the obtained value – does the critical value exceed the obtained value? What does this mean…

A: Concept: Critical value of t is seen in table at DF=n1+n2-2

Q: When the treatment effect is small and you fail to reject the null when in actuality, there was a…

A: Type I error (α): The probability of rejecting the null hypothesis when it is actually true is…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Solution-: x¯=1.7,σ2=0.0036 We state the null and alternative hypothesis

Q: Is this a valid experimental design?

A: Here student want to check fertilizer affect the plant growth

Q: How do we find the gamma and the p-value to evaluate the hypothesis that people who are more…

A: Given information: The output for the association test is given.

Q: Suppose you are testing the null hypothesis that a population mean is less than or equal to 46,…

A:

Q: What is the smallest alpha that you CAN reject the null hypothesis under when you have a p-value of…

A: The level of significance can be defined as the probability of rejecting the null hypothesis when it…

Q: Under what circumstances can you use a z-test instead of a t-test to compare a sample against a…

A: t test and z-test are the statistical tests that are used to find if the value of the sample mean is…

Q: What is the critical value for a two sided t-test with an alpha = .05, and degrees of freedom = 60?

A:

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: According to the given information, we have Mean = 1.7Variance = 0.0036

Q: The type II error is also known as false positive or false alarm. Wrongfully failing to reject the…

A: Here use type 2 error definition

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: Imagine that your null hypothesis is σ2 = 10 and your alternative hypothesis is σ2 > 10. What is…

A: It is given that the test is right-tailed. Level of significance is 0.05. Degrees of freedom is 12–1…

Q: If a sample is an extreme result and is significant, it will fall in the critical region which…

A: Given statement If a sample is an extreme result and is significant, it will fall in the critical…

Q: If the decision rule for a one-tailed test of hypothesis is given as: Reject Ho if z<-2.36. What…

A: The decision rule for a one-tailed test of hypothesis is given as: Reject Ho if z<-2.36 The value…

Q: holders were more likely to have jobs), why would the chi-square test be inappropriate for this…

A: Provided information is, students are measured on whether they had an internship during their time…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: It is been asked to find the hypotheses to test whether the variance of number of accidents per day…

Q: When I examine the design of an experiment, I find that it fell victim to the Fundamental Threat to…

A: Correct Option is A.

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: What are the various Potential Problems with Quasi-Experiments?

A:

Q: If the condition for using the empirical rule is met, why should that rule be used instead of…

A: The Chebyshev’s rule will estimate a minimal percentage, whereas the empirical rule gives almost the…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Solution. Given claim is variance of the number of accidents per day is no longer equal to 0.0025.

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given information- Population mean, μ = 1.9 Population variance, σ2 = 0.0016 Claim- the variance of…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Given, Client had the mean 1.7 auto accidents per day and variance is 0.0016

Q: A random sample of 100 male employees showed that 42 are working from home while a random sample of…

A: Solution: Given information: n1=100 Sample size of male employeesn2=100 Sample size of female…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: From the provided information, Mean (µ) = 1.7 Variance (σ2) = 0.0025

Q: why are large x2 values sometimes obtained when the null hypothesis true?

A: A large chi-square value indicates that the data does not fit very well, that is, there is no…

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of…

A: Here we want to know the null and alternative hypothesis.

Q: It has been hypothesized that allergies result from a lack of early childhood exposure to antigens.…

A: The following are the endotoxin levels at the homes of the 51 children tested negative for…

Q: he records of a casualty insurance company show that, in the past, its clients have had a mean of…

A:

Q: The record of a casualty insurance company show that , in the past, its clients have had a mean of…

A: Here,let μ be the mean of  auto accidents per day and σ2 is the variance of auto accidents per day.…

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.