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Many parents have turned to St. John's wort, an herbal remedy, to treat their children with...
choose the correct answer Extracts of St. John's Wort are widely used to treat depression and...
choose the correct answer
Extracts of St. John's Wort are widely used to treat depression and they selected 200 outpatients diagnosed with major depression. Patients were randomly assigned to two groups. After eight weeks, 27 of 100 those treated with St. John's Wort improved and 19 of 100 the tablets-treated patients showed improvement. Test the hypothesis Ho: P1=p2 against the hypothesis Ho: P14P2 . Use a = = 0.05. Is the following decision correct: Do not Reject Ho True False
ST 350 NCSU 4. /1 points Attention deficit hyperactivity disorder (ADHD) in young children presents significant...
ST 350 NCSU
4. /1 points Attention deficit hyperactivity disorder (ADHD) in young children presents significant challenges to the children, their parents, and their classroom teachers. Stimulant medication can effectively treat 60% to 70% of youth with ADHD. Yet many parents seek alternative therapies, and Hypericum perforatum (St John's wort) is 1 of the top 3 alternative therapies used My Notes In a recent study in the Journal of the American Medical Association, Hypericum perforatum (St John's Wort) for Attention-...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
You are given the following summary statistics from a sample of 26 observations: (You may find...
You are given the following summary statistics from a sample of 26 observations: (You may find it useful to reference the appropriate table: chi-square table or F table) Mean 67.28 Standard Deviation 11.73 Skewness 1.11 Kurtosis 1.78 a. Using the Jarque-Bera test, specify the null and alternative hypotheses to determine whether or not the data are normally distributed. H0: S = 0 and K = 0; HA: S ≠ 0 and K ≠ 0 H0: S = 0 and K...
Help Save & Exit Check my A consumer advocate researches the length of life between two...
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
In order to conduct a hypothesis test for the population mean, a random sample of 28...
In order to conduct a hypothesis test for the population mean, a random sample of 28 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 17.9 and 1.5, respectively. (You may find it useful to reference the appropriate table: z table or t table). HO: MS 17.5 against HA: > 17.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
Consider the following hypotheses: Check my work Ho! HS 570 HA: > 570 Find the p-value...
Consider the following hypotheses: Check my work Ho! HS 570 HA: > 570 Find the p-value for this test based on the following sample information. (You may find it useful to reference the appropriate table: z table or table) a. I = 576; s = 21; n = 27 0.01 s p-value < 0.025 0.025 s p-value < 0.05 Op-value 20.10 p-value <0.01 0.05 s p-value <0.10 b. x=576; s = 21; n = 54 p-value < 0.01 0.01 s...
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a...
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a sample mean of 63.3. Assume that the sample is drawn from a normal population with a population standard deviation of 5.1. (You may find it useful to reference the appropriate table: z table or table) a-1. Find the p-value. O p-value 20.10 O p-value < 0.01 O 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value < 0.10 a-2. What...
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours....
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours. A homeowner selects 27 of these batteries and finds the mean lifetime to be 1065 hours with a standard deviation of 76 hours. Test the manufacturer's claim. Use a = 0.02. P-value = 0.112 > 0.02; do not reject H0; There is not enough evidence support the claim that mean is less than 1500. ОА P-value = 0.025 0.02, do not reject HO, There...
Consider the following hypotheses: Ho: 4 = 150 HA: H < 150 A sample of 80...
Consider the following hypotheses: Ho: 4 = 150 HA: H < 150 A sample of 80 observations results in a sample mean of 144. The population standard deviation is known to be 28. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal...
choose the correct answer
Extracts of St. John's Wort are widely used to treat depression and they selected 200 outpatients diagnosed with major depression. Patients were randomly assigned to two groups. After eight weeks, 27 of 100 those treated with St. John's Wort improved and 19 of 100 the tablets-treated patients showed improvement. Test the hypothesis Ho: P1=p2 against the hypothesis Ho: P14P2 . Use a = = 0.05. Is the following decision correct: Do not Reject Ho True False
ST 350 NCSU
4. /1 points Attention deficit hyperactivity disorder (ADHD) in young children presents significant challenges to the children, their parents, and their classroom teachers. Stimulant medication can effectively treat 60% to 70% of youth with ADHD. Yet many parents seek alternative therapies, and Hypericum perforatum (St John's wort) is 1 of the top 3 alternative therapies used My Notes In a recent study in the Journal of the American Medical Association, Hypericum perforatum (St John's Wort) for Attention-...
Consider the following sample data with mean and standard deviation of 177 and 7.3, respectively. (You may find it useful to reference the appropriate table: chi-square table or F table) class Frequency Less than 10 25 10 up to 20 20 up to 30 86 72 30 or more 20 n 203 a. Using the goodness-of-fit test for normality, specify the competing hypotheses in order to determine whether or not the data are normally distributed. OHo: The data are normally...
Help Save & Exit Check my A consumer advocate researches the length of life between two brands of refrigerators, Brand A and Brand B. He collects data (measured in years) on the longevity of 40 refrigerators for Brand A and repeats the sampling for Brand B. These data are measured in years. (You may find it useful to reference the appropriate table: z table or table) 10 points Brand A Brand B Brand A Brand B eBook **************** 3322282292393282939 Click...
In order to conduct a hypothesis test for the population mean, a random sample of 28 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 17.9 and 1.5, respectively. (You may find it useful to reference the appropriate table: z table or t table). HO: MS 17.5 against HA: > 17.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
Consider the following hypotheses: Check my work Ho! HS 570 HA: > 570 Find the p-value for this test based on the following sample information. (You may find it useful to reference the appropriate table: z table or table) a. I = 576; s = 21; n = 27 0.01 s p-value < 0.025 0.025 s p-value < 0.05 Op-value 20.10 p-value <0.01 0.05 s p-value <0.10 b. x=576; s = 21; n = 54 p-value < 0.01 0.01 s...
Consider the following hypotheses: HOOM 3 62.2 HA!u> 62.2 A sample of 44 observations yields a sample mean of 63.3. Assume that the sample is drawn from a normal population with a population standard deviation of 5.1. (You may find it useful to reference the appropriate table: z table or table) a-1. Find the p-value. O p-value 20.10 O p-value < 0.01 O 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value < 0.10 a-2. What...
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours. A homeowner selects 27 of these batteries and finds the mean lifetime to be 1065 hours with a standard deviation of 76 hours. Test the manufacturer's claim. Use a = 0.02. P-value = 0.112 > 0.02; do not reject H0; There is not enough evidence support the claim that mean is less than 1500. ОА P-value = 0.025 0.02, do not reject HO, There...
Consider the following hypotheses: Ho: 4 = 150 HA: H < 150 A sample of 80 observations results in a sample mean of 144. The population standard deviation is known to be 28. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic. (Negative value should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal...
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