If p-value is very large like 0.9, what can we do about a null hypothesis? If p-value is very small like 0.0001, what can we do about a null hypothesis?

Q: The level of risk associated with the null hypothesis is generally set at?

A: Given data The level of risk associated with the null hypothesis

Q: Why we say the smaller the ρ-value, the stronger the evidence against the Null Hypothesis?

A: p value in a hypothesis testing represents the likelihood of your data would have occurred under the…

Q: Just because a statistically significant result occurs doesn't mean we should quickly alter our…

A: Alzheimer’s disease is a disease of the nervous system and simply put, it is the leading cause of…

Q: If we do not reject the null hypothesis when the alternative hypothesis is true, we have made a…

A: Fill in the required  blank

Q: A paint manufacturer advertises that one gallon of its paint will cover 400 square feet of an…

A: For paint manufacturer, The null and alternative hypothesis are : Ho : μ=400H1 : μ<400  For…

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: You wish to test the hypothesis that female college students spend more on wearing apparel than male…

A: The given null and alternate hypotheses are: H0:mF≤mM H1:mF>mM If you concluded that female…

Q: are conducting a study to see if the accuracy rate for fingerprint identification is significantly…

A: A hypothesis is said to be left tailed, if the population parameter is less than some hypothesized…

Q: ​b) A pharmaceutical company wonders if its new drug has a cure rate different from the 58​% rate…

A: Here we are conducting a hypothesis test to check if the cure rate of new drug is different from the…

Q: d) Based on your answer to part (c), choose what can be concluded, at the 0.05 level of…

A: d) In the given situation, p=0.0184 α=0.05 Decision Rule: If p-value ≤ α, then reject the null…

Q: The mathematics department at one university reports that the failure rate for College Algebra is no…

A: 2 types of errors. Type 1: Rejecting null hypothesis when it is True Type 2: Fail to reject null…

Q: Suppose the results indicate that the null hypothesis should not be rejected; thus, it is possible…

A: GivenHypothesis test was conducted to see if a new HIV vaccination reduces the risk of contracting…

Q: A decision to reject the null hypothesis means you have demonstrated that the treatment has no…

A: Given problem Given that   A decision to reject the null hypothesis means you have demonstrated…

Q: Please come up with a research hypothesis H1 and note the corresponding null hypothesis (H0). why we…

A: A research hypothesis is a formal statement of the expected relationship between two or more…

Q: University officials hope that changes they have made have improved the retention rate. Last year, a…

A: Solution-: Let, p_1 and p_2 be proportion of population1 and population 2 respectively. Given: We…

Q: Which is the null hypothesis? * There is a significant relationship between a person's age and their…

A: We have given that the data of two populations one of person’s age and other one is time spent for…

Q: Which of the two hypotheses is the researcher always testing to reject or not?

A: The hypotheses are null and alternative hypothesis.

Q: A refrigerator manufacturer claims that the mean life of its competitor's refrigerators is less than…

A:

Q: he body weight of a healthy 3-month-old colt should be about μ = 62 kg. (a) If you want to set up a…

A:

Q: Ho: 0 H;: []

A: Explanation :There are two hypotheses that are made: the null hypothesis, denoted Ho, and the…

Q: When testing for our hypothesis, we are actually testing the truthfulness of our null hypothesis.…

A:

Q: -Find the correct null hypothesis and for each correct alternative hypothesis 1. Suppose a pollster…

A:

Q: The purpose of this problem is to interpret a P-value correctly. 1 True False If P-value = 7%, then…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: You have a one-sided hypothesis test with alpha level 0.05 and p-value of 0.04. Which of the…

A: Given: α=0.05P-Value=0.04

Q: Suppose a researcher comes up with a new drug that in fact cures AIDS. She assigns some AIDS…

A: A researcher finds a new drug which will cure AIDS. To ensure this she tests H0 : the new drug has…

Q: If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected at the 0.01…

A: Statement: " If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected…

Q: Based on this information, which one of the following statements is correct?                If a…

A: We have given that  Claim: The true population proportion of adults who favour the colour purple is…

Q: When testing for differences between the means of two related populations, what is the null…

A:

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: We have to find out given null and alternative hypothesis that we would use for this hypothesis…

Q: State the null and alternative hypotheses for the above scenario.

A: HERE given, Our environment is very sensitive to the amount of ozone in the upper atmosphere. The…

Q: When a researcher rejects a null hypothesis and he should have reject it what can of error has…

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on…

Q: If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make…

A: Note: Thank you for the question. Since multiple questions are posted, according to our policy, we…

Q: If a hypothesis is rejected at the 1% level of significance, it will always be rejected at the 5%…

A: If a null hypothesis is rejected at 1% level of significance then we have find out what will happen…

Q: A city police department is considering replacing thetires on its cars with a new brand tires. If μ1…

A: A city police department is considering replacing the tires on its cars with new brand tires. As…

Q: Our goal is to see whether the global temperatures have been getting higher. For the following…

A: As per the question Claim:- Global temperature have been getting higher. I

Q: -Find the correct null hypothesis and for each correct alternative hypothesis 3. Suppose you hear a…

A: The claim is that the average is higher than 78.

Q: You are testing the null hypothesis µ=55 versus the two tailed alternative. You fail to reject the…

A: It is given that,Null Hypothesis : µ = 55Alternative hypothesis : µ ≠ 55

Q: A software company advertises that its software can improve students' grades by at least 15%.  One…

A: Type I error has occurred, when the null hypothesis is rejected while the null hypothesis is true.…

Q: t is more difficult to reject a null hypothesis if we use a 10% level of significance compared with…

A: Given that  Rejection of null hypothesis Level of significance (α)= 0.10 Level of significance (α) =…

Q: -Find the correct null hypothesis and for each correct alternative hypothesis 7. Suppose you hear a…

A: Solution

Q: A recent article in a university newspaper claimed that the proportion of students who commute more…

A: Claim : The proportion of students who commute more than 15 miles to school is no more than 20%. Let…

Q: If you want to carry out a statistical test at α = 0.01. to test whether the population mean is…

A: Given: Level of significance (α) = 0.01 Test statistic of z = 1.97 Sample size (n) = 300

Q: The mathematics department at one university reports that the failure rate for College Alge is no…

A: Type I error= Rejecting the null hypothesis when it is TRUE. Type II error = Fail to reject null…

Q: When asked what it means for the result of a hypothesis test to be practically significant (or…

A:

Q: researcher will end up accepting

A: Alpha = level of significance = 0.05.  so, here type I error is 0.05. ie.  if the null hypothesis…

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: A fellow student tells you the P-value is the probability that the null hypothesis is true, so when…

A: Meaning and usefulness ofp-value in hypothesis testing.

Q: A software company advertises that its software can improve students' grades by at least 15%.  One…

A: Types of errors: Rejecting a true null hypothesis is called a Type I error. Failing to reject a…

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.