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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:The null and alternative hypotheses are:
Ho P - P = 0
H : Pi - P+ 0
A sample of 200 observations from the first population indicated that X is 170. A sample of 160 observation arom the second
population revealed X2 to be 120. Use the 0.05 significance level to test the hypothesis.
a. State the decision rule. (Negative answer should be indicated by a minus sign. Round the final answers to 2 decimal places.)
The decision rule is to reject Ho if z (Click to select)
b. Compute the pooled proportion. (Round the final answer to 2 decimal places.)
ces
The pooled proportion is
c. Compute the value of the test statistic. (Round the final answer to 2 decimal places.)
The test statistic is z
d. What is your decision regarding the null hypothesis?
Ho is (Click to select)
e. Determine the pvalue. (Round the final answer to 4 decimal places.)
The pvalue is
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- review(31a) MAKE SURE YOU SELECT TWO ANSWERS FOR THIS QUESTION.. Type of test and hypotheses. Professor dill wonders if male and female earn significantlly differnent grades, when taking the same course with the same instructor. He randomly samples 160 males. and 100 females. The males receive 20 A's, 32 B's 70 C's 30 D's, anf 8 F's.The female receive 20'A's, 28 B's, 30 C's, and 10 D's. and 12 F's; His hypotheses is that gender and grades are related. Choose the type of test you should choose to test the hypotheses in symbol notation( or in words if symbol is not appropriate) (a) Z test (b)single sample t test (c)dependent t test (d) independent t test (e) Pearson correlation coeffieient. (f) ANOVA (g) chi Square goodness of fit test (h)Chi Square test of independence (i) Ho: u1-u2=0 H1: u1-u2!=0 (j) Ho: u1-u2 =0 H1:u1-u2<0 (k) Ho: u1-u2 >= 0 H1: u1=u2<0 (l) Ho : Rho=0 H1: Rho!=0 (m) Ho: Rho >= 0 H1: Rho <0 (n) Ho:Rho <= 0 H1: Rho >…arrow_forwardA refrigerator manufacturer claims that the mean life of its refrigerators is greater than 13 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? (a) Ho: V 13 Ha: V 13 (b) Ho: V 13 Ha: 13 Click to select your answer(s). MacBookarrow_forwardEspañol On their website, a property management company states that the mean monthly rent for apartments on the east side of town is $725. A researcher for a consumer advocacy group believes that, due to the construction of newer apartment complexes in neighboring towns, the mean monthly rent on the east side, µ, is now lower. A random sample of 22 monthly rents for apartments on the east side has a mean of $715, with a standard deviation of $19. Assume that current monthly rents for apartments on the east side are approximately normally distributed. Based on the sample, is there enough evidence to conclude, at the 0.05 level of significance, that the population mean monthly rent is now less than what is stated on the website? 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.)arrow_forward
- A refrigerator manufacturer claims that the mean life of its competitor's refrigerators is less than 14 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? (a) Ho: V 14 Hạ: V 14 (b) Но: 14 H3: V 14arrow_forwardIf null hypothesis really is false because of large effect. Explain about the statement.arrow_forward13arrow_forward
- A teacher claims that fewer than 25% of his students are ready for class each day. -State the claim -State the opposite of the claim -State the null hypothesisd.State the alternative hypothesis -State the type of test (left tailed, right tailed, or two tailed) -Use α = 0.05 to find the critical z-value used to test the null hypothesisarrow_forwardhelp me pleasearrow_forwardWhat does the decision to retain null hypothesis implies?arrow_forward
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