Please answer both parts and label them clearly
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Please answer both parts and label them clearly
Let p denote the population proportion. Provided that...
Please answer both and label them clearly Let X1, X2,..., Xn be a random sample from...
Please answer both and label them clearly
Let X1, X2,..., Xn be a random sample from a normal population with mean y unknown and standard deviation o known. 1. At significance level of a, find the rejection region (decision rule) for the following hypotheses. Họ: A = 90, Ha : < 0. 2. For the rejection region (decision rule) in (1) find the B when = Mi (ui)).
10.9 Exercise: Approval Rating Let p denote the proportion of Americans who approve President Trump. In...
10.9 Exercise: Approval Rating Let p denote the proportion of Americans who approve President Trump. In a poll of December, 2018, an estimated approval rating for President Trump was 48% among 3,018 registered voters. Treat the sample as a simple random sample (i.e., a fair representation of all registered voters in U.S.). Is this statistical evidence that the population approval rating is less than 50% of all registered voters in the nation? Use a = 0.05 for the significance level....
Let X1, X2, . . . , Xn be a random sample of size n from...
Let X1, X2, . . . , Xn be a random sample of size n from a normal population with mean µX and variance σ ^2 . Let Y1, Y2, . . . , Ym be a random sample of size m from a normal population with mean µY and variance σ ^2 . Also, assume that these two random samples are independent. It is desired to test the following hypotheses H0 : σX = σY versus H1 : σX...
Please clearly show and label each step Consider the following hypothesis test: Ho: μ = 16...
Please clearly show and label each step Consider the following hypothesis test: Ho: μ = 16 H1: μ ≠ 16 A sample of 50 provided a sample mean of 15.15. The population standard deviation is 3. Compute the value of the test statistic. What is the p value? At α = 0.05, what is the rejection rule using the critical value? What is your conclusion?
the unknown Popular random sample of size 17 is obtained from a normal (15) 4.Malding a...
the unknown Popular random sample of size 17 is obtained from a normal (15) 4.Malding a sample standard deviation of S. Teet the nuit that the unknown population variance is greater than or 169, versus the alternative hypothesis that the unknown lance is less than 169 using a 1% level of significance hypothesis that Set up the null and alternative hypotheses, clearly defining any unknown parameters. Note the value is always in the mull hypothesis m atatest statistie: (1) sensitive...
Suppose you want to test the following hypotheses: H0: p ≥ 0.4 vs. H1: p <...
Suppose you want to test the following hypotheses: H0: p ≥ 0.4 vs. H1: p < 0.4. A random sample of 1000 observations was taken from the population. Answer the following questions and show your Excel calculation for each question clearly: (a) Let p ̂ be the sample proportion. What is the standard error of sample proportion (i.e., σ_p ̂ ) if H0 is true? (b) If the sample proportion obtained were 0.38 (i.e., p ̂=0.38), what is its p-value?...
A study is designed to test Ho: P-0.50 against H: p>0.50, taking a random sample of...
A study is designed to test Ho: P-0.50 against H: p>0.50, taking a random sample of size n-100, using a significance level of 0.05. Show that the rejection region consists of values of p> 0.582 a. Sketch a single picture that shows (i) the sampling distribution of p when Ho is true and (ii) the sampling distribution of p when p-0.60. Label each sampling distribution with its mean and standard error and highlight the rejection region. b. c. Find P(Type...
A random sample of size 15 is obtained from a normal population yielding a sample standard...
A random sample of size 15 is obtained from a normal population yielding a sample standard deviation of 20. Test the null hypothesis that the unknown population variance is greater than or equal to 162 versus the alternative that the unknown population variance is less than 162 using a 5% level of significance a. Set up the null and alternative hypotheses, clearly defining any unknown parameters. Note the “=” value is always in the null hypothesis. b. Find a test...
According to a certain government agency for a large country, the proportion of fatal traffic accidents...
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.39 Suppose a random sample of 104 traffic fatalities in a certain region results in 52 that involved a positive BAC Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the c = 0.05 level...
7. Hypothesis tests about a population proportion A firm's corporate strategy is driven largely by its...
7. Hypothesis tests about a population proportion A firm's corporate strategy is driven largely by its top management team. One method of gauging the influence of marketing on corporate strategy is to measure the proportion of firms with a chief marketing officer on their top management team. Over the 5-year period from 2000 to 2004, 42% of firms had a chief marketing officer on their top management team. [Source: Pravin Nath and Vijay Mahajan, "Chief Marketing Officers: A Study of...
Please answer both and label them clearly
Let X1, X2,..., Xn be a random sample from a normal population with mean y unknown and standard deviation o known. 1. At significance level of a, find the rejection region (decision rule) for the following hypotheses. Họ: A = 90, Ha : < 0. 2. For the rejection region (decision rule) in (1) find the B when = Mi (ui)).
10.9 Exercise: Approval Rating Let p denote the proportion of Americans who approve President Trump. In a poll of December, 2018, an estimated approval rating for President Trump was 48% among 3,018 registered voters. Treat the sample as a simple random sample (i.e., a fair representation of all registered voters in U.S.). Is this statistical evidence that the population approval rating is less than 50% of all registered voters in the nation? Use a = 0.05 for the significance level....
the unknown Popular random sample of size 17 is obtained from a normal (15) 4.Malding a sample standard deviation of S. Teet the nuit that the unknown population variance is greater than or 169, versus the alternative hypothesis that the unknown lance is less than 169 using a 1% level of significance hypothesis that Set up the null and alternative hypotheses, clearly defining any unknown parameters. Note the value is always in the mull hypothesis m atatest statistie: (1) sensitive...
A study is designed to test Ho: P-0.50 against H: p>0.50, taking a random sample of size n-100, using a significance level of 0.05. Show that the rejection region consists of values of p> 0.582 a. Sketch a single picture that shows (i) the sampling distribution of p when Ho is true and (ii) the sampling distribution of p when p-0.60. Label each sampling distribution with its mean and standard error and highlight the rejection region. b. c. Find P(Type...
According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.39 Suppose a random sample of 104 traffic fatalities in a certain region results in 52 that involved a positive BAC Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the c = 0.05 level...
7. Hypothesis tests about a population proportion A firm's corporate strategy is driven largely by its top management team. One method of gauging the influence of marketing on corporate strategy is to measure the proportion of firms with a chief marketing officer on their top management team. Over the 5-year period from 2000 to 2004, 42% of firms had a chief marketing officer on their top management team. [Source: Pravin Nath and Vijay Mahajan, "Chief Marketing Officers: A Study of...
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