Note :
Null hypothesis contain , and sign.
and alternative hypothesis contain , and sign
If alternative hypothesis contain then test is two tailed test.
If alternative hypothesis contain then test is left tailed test.
If alternative hypothesis contain then test is right tailed test.
1) Claimed that the mean IQ of statistics instructors is greater than 120.
Hypothesis - , ( claim ) , Right tailed test.
2) A dean at JWU claim that the mean time for students to earn a Master's degree in Business is at most 5.2.
Hypothesis - ( claim ) , , Right tailed test
3) A researcher claims that 65% of voters favor gun control..
Hypothesis - ( claim ) , , Two tailed test.
4)
Type I error is the rejection of a true null hypothesis
Type II error is failing to reject a false null hypothesis
Claim : The mean score for all NBA games during a particular season was less than 105 points per game.
Hypothesis : , ( claim )
Type I error : Reject null hypothesis when is true.
Type II error : Fail to reject null hypothesis when is true.
5)
Claim is a candidate for governor of RI claims to be favored by at least half of the votes.
Hypothesis -
( Claim )
Let decision is fail to reject null hypothesis .
So conclusion is ,
There is sufficient evidence to support the claim P >= 0.5
Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than...
Hypothesis Testing . It is claimed that the mean IQ of statistics instructors is greater than 120. Write the null and alternative hypothesis statements . A dean at JWU claims that the mean time for students to eam a Master's Degree in Business is at most 5.2 years. Write the null and alternative hypothesis statements. A researcher claims that 65% of voters favor gun control. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed The mean...
The mean IQ of statistics teachers is greater than 140. State this claim mathematically. Write the null and alternative hypotheses. Identify which hypothesis is the claim.
Test the claim that the mean GPA of night students is smaller than 2.8 at the .10 significance level. The null and alternative hypothesis would be: H1 : p < 0.7 H1ιμ>2.8 H1 : μ < 2.8 Ho:p 0.7 Ho:p 0.7 Ho: 2.8 The test is: left-tailed right-tailed two-tailed Based on a sample of 65 people, the sample mean GPA was 2.76 with a standard deviation of 0.05 The test statistic is: decimals) The critical value is: decimals) Based on...
Test the claim that the mean GPA of Orange Coast students is significantly different than the mean GPA of Coastline students at the 0.05 significance level. The null and alternative hypothesis would be: The test is: two-tailed, right-tailed, left-tailed? The sample consisted of 60 Orange Coast students, with a sample mean GPA of 3.38 and a standard deviation of 0.04, and 60 Coastline students, with a sample mean GPA of 3.41 and a standard deviation of 0.06. The test statistic...
1.) Assume that a sample is used to estimate a population proportion p. Find the margin of error m that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. 95% confidence; n = 380, x = 50 Group of answer choices 0.0340 0.0408 0.0306 0.0357 2.) Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. A researcher claims that 62% of voters favor gun control. Assuming that...
A hypothesis test is conducted to test the null hypothesis that the mean is less than 12. Use a 0.01 level of significance. What type of test is this? Right tail Two tail Left tail What is the critical value? 2.33 -2.33 1.78 correct answer is not given Suppose the test statistic was -2.50 What is the conclusion? Fail to reject Ho. There is not sufficent evidence to support the claim that the mean is less than 12. Reject Ho....
Test the claim that the mean GPA of night students is smaller than 2.3 at the 0.025 significance level. Test the claim that the mean GPA of night students is smaller than 2.3 at the 0.025 significance level The null and alternative hypothesis would be: Ho:2 2.3 Ho:H 2.3 Ho: 2.3 Ho:p 2 0.575 Ho:p 0.575 Ho:p0.575 H1: μ < 2.3 H1: μメ2.3 H1ιμ > 2.3 Hi : p < 0.575 H1: pチ0.575 Hi :p > 0.575 The test is:...
Test the claim that the mean GPA of night students is significantly different than the mean GPA of day students at the 0.02 significance level. The null and alternative hypothesis would be: Ho: PN PD Ho: un up Ho:un = up Ho:PN = pd Ho: PN PD Ho: un μD H:PN + PD H: Un <Hp H: Un > Hp H:PN <PD H:PN > PD Hunt up O O The test is: right-tailed two-tailed left-tailed The sample consisted of 70...
1. What are null hypothesis and alternative hypothesis? 2. Inastatisticaltest,wehavethechoiceofatwo-tailedtest,aleft- tailed test, or a right-tailed test. Which hypothesis is the determining factor for choosing the direction of the test? (In other words, how would you decide it) 3. Forthesamesampledataandnullhypothesis,howdoesthe P-value for a two-tailed test compare to that for a one-tailed test? 4. Using P-value method, how would you reject or fail to reject the null hypothesis? (what is the decision criteria?) How does level of significance matter to the hypothesis...
Test the claim that the mean GPA of night students is significantly different than 2.3 at the 0.2 significance level. The null and alternative hypothesis would be: Ho:= 2.3 Ho:p = 0.575 Ho:f = 2.3 Ho:p = 0.575 H.:= 2.3 Ho:p=0.575 H:H+ 2.3 H :p < 0.575 H : > 2.3 H:p > 0.575 H:4 < 2.3 H :P + 0.575 The test is: two-tailed right-tailed left-tailed Based on a sample of 65 people, the sample mean GPA was 2.28...