Why is the null hypothesis H0: μ = 0?
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Why is the null hypothesis H0: μ = 0?
Hypotheses:
Hypotheses is the plural form for hypothesis. Hypothesis is a statement about the population parameter like mean, proportion and standard deviation. Moreover, the hypothesis represents the assumption about the probability distribution of one or more variables.
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- 19% of all college students volunteer their time. Is the percentage of college students who are volunteers smaller for students receiving financial aid? Of the 343 randomly selected students who receive financial aid, 48 of them volunteered their time. What can be concluded at the αα = 0.01 level of significance? For this study, we should use The null and alternative hypotheses would be: H0:H0: (please enter a decimal) H1:H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly lower than 19% at αα = 0.01, so there is insufficient evidence to conclude that the percentage of financial aid recipients who volunteer is lower than 19%. The data suggest the populaton…A decade old study found that the proportion of high school seniors who felt that getting rich was an important personal goal was 69%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H o and the alternative hypothesis H 1 that we would use for this test. H o: H 1:Only numbers 3 and 4
- You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly larger than 62% at a level of significance of a = 0.01. According to your sample, 62 out of 93 potential voters prefer the Democratic candidate. a. For this study, we should use z-test for a population proportion OF b. The null and alternative hypotheses would be: Ho: (p enter a decimal) OF H₁: p enter a decimal) 0° OF c. The test statistic (zŵ) = your answer to 3 decimal places.) d. The p-value = to 4 decimal places.) e. The p-value is a (please (Please (please show f. Based on this, we should (fail to reject î hypothesis. (Please show your answer the nullFertilizer: A new type of fertilizer is being tested on a plot of land in an orange grove, to see whether it increases the amount of fruit produced. The mean number of pounds of fruit on this plot of land with the old fertilizer was 391 pounds. Agriculture scientists believe that the new fertilizer may increase the yield. State the appropriate null and alternate hypotheses. The null hypothesis is Ho:μ (choose one) and Answers The alternate hypothesis is H1:μ (choose one) and AnswersTest the null hypothesis H0:μ=3.9 against the alternative hypothesis HA:μ≠3.9, based on a random sample of 29 observations drawn from a normally distributed population with x¯=4.1 and σ=0.89 calculate the appropriate p-value.
- could you make it clear?Suppose that a researcher decides that he MUST obtain a Type 1 error level of no more than 0.01 in order to reject the null hypothesis. After analyzing his data he finds that the results are significant at p = 0.05 but not at p = 0.01. If he is not able to change the maximum allowed Type 1 error level, then the researcher should Question 5 options: retain the null hypothesis because 0.05 is greater than 0.01. retain the null hypothesis because 0.05 is merely sampling error. reject the null hypothesis because 0.05 is close to 0.01. reject the null hypothesis because 0.05 is greater than 0.01.Amedical researcher says that less than 79% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 300 adults in that country, 75% think that healthy children should be required to be vaccinated. At a= 0.01, is there enough evidence to support the researcher's claim? Complete parts (a) through (e) below SE (a) Identify the claim and state H, and H,. ome Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) ents O A. Less than % of adults in the country think that healthy children should be required to be vaccinated. ok O B. More than % of adults in the country think that healthy children should be required to be vaccinated. Contents C. %% of adults in the country think that healthy children should be required to be vaccinated. O D. The percentage of adults in the country who think that healthy children should be…
- Suppose that we have a problem for which the null and alternative hypothesis are given by: H0: μ = $1250. H1:μ ≠ $ 1250 Is this a right-tailed test, left-tailed test, or two-tailed test. Find the z value based on a level of significance of α=.12.Imagine you are doing a Related-Samples t-test, and you are on Step One of the hypothesis test. If you are doing the test with α = .05, and two tails, how would the H0 (null hypothesis) look?Only 19% of registered voters voted in the last election. Will voter participation increase for the upcoming election? Of the 363 randomly selected registered voters surveyed, 91 of them will vote in the upcoming election. What can be concluded at the αα = 0.01 level of significance? For this study, we should use The null and alternative hypotheses would be: H0:H0: _______ (please enter a decimal) H1:H1: ________ (Please enter a decimal)
