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- We wish to estimate what percent of adult residents in a certain county are parents. Out of 400 adult residents sampled, 24 had kids. Based on this, construct a 90% confidence interval for the proportion p of adult residents who are parents in this county.Express your answer in tri-inequality form. Give your answers as decimals, to three places. _______ < p < ______ Express the same answer using the point estimate and margin of error. Give your answers as decimals, to three places.p = ________ ± ________The graph portrays the decision criterion for a hypothesis test for a population mean. The null hypothesis is H:u=µ. The curve is the normal curve for the test statistic under the assumption that the null hypothesis is true. Use the graph to solve the problem. A graphical display of the decision criterion follows. do 0.9 Do not reject H Reject H, 0.8- 0.7- 0.6- 05- 04 0.3- 0.2- 0.1- !0.014 -059 0.59 L18 137 236 295 3.54 2.197 Determine the rejection region. O0.014 02.197 O All z-scores that lie to the right of 2.197 OAll 2-scores that lie to the left of 2.197pls answer based on the choices
- Construct a 99% confidence interval to estimate the population mean using the data below. x-51 0 =9 n= 43 With 99% confidence, when n= 43 the population mean is between a lower limit of and an upper limit of (Round to two decimal places as needed.) Enter your answer in each of the answer boxes. Save for Later. O Type here to search .::: ace F9 F1C F7 F8 F5 F6 F2 F3 F4 出We wish to estimate what percent of adult residents in a certain county are parents. Out of 200 adult residents sampled, 188 had kids. Based on this, construct a 90% confidence interval for the proportion p of adult residents who are parents in this county.Express your answer in tri-inequality form. Give your answers as decimals, to three places._____ < p < _____ Express the same answer using the point estimate and margin of error. Give your answers as decimals, to three places.p = _____ ± _____Determine the rejection region for a hypothesis test for the population mean using the give information. Assume that the population standard deviation is unknown, the sample size is small, and the population distribution is approximately normal. Write your answer in a format exactly as in the following examples, "t <= -2.203", or "t >= 1.706", or "|t| >= 1.305". Do not forget the SPACE after t and the SPACE before the number. Also make sure to enter the digit 0 before the decimal point. ?=0.90,??=18 two-tailed test Reject H0 if
- State the null and alternative hypotheses for the statistical test described below. Testing to see if there is evidence that a proportion is greater than 0.3. :: µ2 :: p : P1 :: P2 :: 0.3 :: x1 :: :: x2 :: P1 : P2 el :: Ho: i vs Ha: :: ::Test the claim below about the mean of the differences for a population of paired data at the level of significance a. Assume the samples are random and dependent, and the populations are normally distributed. Claim: H, 20; a = 0.05. Sample statistics: d = -2.2, s, = 1.5, n=14 Identify the null hypothesis by writing its complement. O A. Ho: Ha #0 Ha: H = 0 O B. Ho: Hg s0 Hgi Hg>0 O D. Ho: Ha 0 E. Ho: Ha 20 H: H <0 The test statistic is t= -5.49. (Round to two decimal places as needed.) The critical value(s) is(are) t, = - 1.77 (Round to two decimal places as needed. Use a comma to separate answers as needed.) V the rejection region, V the null hypothesis. There V statistically significant evidence to reject the claim. Since the test statistic isThe test statistic in a left-tailed test is z=−0.59. Determine the P-value and decide whether, at the 10% significance level, the data provide sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis. The P-value is ___________ (Round to four decimal places as needed.) This P-value ________________ (provides, does not provide) sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis because it is_____________(greater than, less than) the significance level.
- The graph portrays the decision criterion for a hypothesis test for a population mean. The null hypothesis is H:H=Po: The curve Is the normal curve for the test statistic under the assumption that the null hypothesis is true. Use the graph to solve the problem. A graphical display of the decision criterion follows. 0.9- Do not reject H. Reject H, 0.8- 0.7 -0.6- 0.5- 034 10.005 413 3542s s 8 o59 03 1.is 17 136 2.576 Determine the rejection reglon. Submit Assignment Continue 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy AccessibilityThe graph portrays the decision criterion for a one-mean z-test. The curve in the graph is the normal curve for the test statistic under the assumption that the null hypothesis is true. Use the graph to solve the problem. A graphical display of the decision criterion follows. Reject Ho Reject Ho Do not reject Ho N 0.01 0.01 0 1 2 -3 -2 -1 -2.33 2.33 Determine the rejection region. OA. Z≥ 0.01 B. z -2.33 or z= 2.33 O C. z≤ -2.33 or z ≥ 2.33 O D. - 2.33 ≤z≤ 2.33:) For each of the situations below, define the parameter (proportion or mean) and write the null and alternative hypotheses in terms of parameter values. Example: We want to know if the proportion of up days in the stock market is 50%. Answer: Let p the proportion of up days. Ho: p = 0.5 vs. HA P# 0.5. : (a) Last year, customers spent an average of $45.82 per visit to the company's website. Based on a random sample of purchases this year, the company wants to know if the mean this year has changed. Let (p, p, μ, or x)= the of customer spending per visit to the website. ; HA Ho: (b) A pharmaceutical company wonders if their new drug has a cure rate lower than the 30% reported by the placebo. Let Ho: (p, p, μ, or )= the ; HA: Ho: of patients cured by the new drug. (c) A bank wants to know if the percentage of customers using their website has changed from the 40 % that used it before their system crashed last week. Let (p, p, μ, or ) the ; HA: of customers using the bank website.