According to the Stanford School of Medicine Blood Center, blood type for Americans is distributed as follows:TypeOABABPercentage 44%42%10%4%A random sample of 200 Americans is selected and the blood type is recorded for each. The data is summarized in the table below.TypeOABABFrequency 84801917A Chi-square Goodness of Fit Test is conducted to test the hypotheses:Ho: The observed frequencies are consistent with the stated percentages. (The distribution of blood type appears to be correct.)HA: The observed frequencies are inconsistent with the stated percentages. (At least one of the stated percentages is incorrect.)Answer the questions given below. QUESTION 5Is the null hypothesis Ho rejected at the a=O yesno5% level?

here given data of blood type of americans

Answered: Is the null hypothesis Ho rejected at…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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For the situation described below, state the null hypothesis, Ho, and the alternative hypothesis, H, to be tested. (Enter != for # as needed.) A statistical test is designed to show that the proportionp of defectives has decreased below 0.6%. Ho: 0.6 H: 0.6
In a test of statistical hypotheses, the P-value tells us O the probability of observing a sample mean as we did or something more unusual if the null hypothesis is true. if the null hypothesis is true. if the alternative hypothesis is true. the largest level of significance at which the null hypothesis can be rejected.
If a hypothesis is rejected at significance level α = 0.01, is it possible that the hypothesis is not rejected if the same test was done at significance level α = 0.05 (with everything else staying the same)?
Suppose you test the null hypothesis Ho : o? = o against the alternative hypothesis Ha:o? + o at a significance level of a about the p-value of your test? 5%. The value of your F-statistic is 2.67. What is true O The p-value is 5%. O The p-value is P(F > 2.67). O The p-value is less than 5%, O The p-value is 2 P(F> 2.67).
It has been said in Seattle, Washington that at least 50% of the days are rainy. A researcher wanted to prove this statement. Null Hypothesis:?
A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 77%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 77% of married couples. In a random sample of 215 married couples who completed her program, 167 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor’s claim at the 0.10 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1. H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three…
Mark performed a two-sample z-test for proportions to test the hypothesis that there was no difference in the proportion who support increasing student fees between male and female students at a particular university. Mark obtained a z-statistic of 0. Based on this information, which of the following is always true. The sample proportions for male and females will be the same as the hypothesized proportions for male and female students at this university. The sample proportions for both male and female students at this university will be 0. All male and female students in the sample will feel the same way about supporting the increase in student fees. The sample proportions will be the same for both male and female students at this university. Test whether p1>p2 The sample data are x1=116,n1=258,x2=135,n2=311. Conduct a test at the α=0.10 level of significance. Determine the correct null and alternative hypothesis below. Determine the test statistic. Find the P-value: What is…
Suppose you have a friend that thinks at least a quarter (25% or 0.25) of all US adults believe in ghosts. Thus, the null hypothesis would be, HO: p = 0.25 Suppose a telephone survey of 1000 randomly selected US adults found that 0.31 or 31% of them say they believe in ghosts. If the null hypothesis is true, the uncertainty or Standard Error in this sample proportion = 0.014 Based on this information, what is the value for the Z-statistic in this hypothesis test? (Round your answer to two decimal places.) Answer:
Big fish: A sample of 250 flounder of a certain species have sample mean weight 50.5 grams. Scientists want to perform a hypothesis test to determine how strong the evidence is that the mean weight is less than 49 grams. State the appropriate null and alternate hypotheses.
Answer the following True or False: Suppose a hypothesis test was performed with a level of significance of 0.05. Then if the null hypothesis is actually true, then there is a 5% chance that the researcher will end up accepting the alternative hypothesis in error. false true
A banker, who works at a credit union, is interested in studying the average percent of banking fees customers per on a monthly basis. It is known that the average monthly banking fee is 9 dollars. The banker believes the average monthly banking fee has increased. What are the hypotheses? Fill in the blanks with the correct symbol (=,#,) to represent the correct hypothesis. Sorry, that's incorrect. Try again? null hypothesis :H 19 alternative hypothesis : µ 9
A newsletter publisher believes that 29% of their readers own a laptop. Is there sufficient evidence at the 0.05 level to refute the publisher's claim? State the null and alternative hypothesis for the above scenario

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Is the null hypothesis Ho rejected at the a = 5% level?