The idea behind Hypothesis testing: consider this example Ho: The mean birthweight of a baby is...
The idea behind Hypothesis testing: consider this example Ho:
The mean birthweight of a baby is 7.5 pounds. Ha: the mean
birthweight is not 7.5 pounds.
To test the claim a Simple Random Sample is collected, the mean and
standard deviation of the birthweights of the babies in the sample
is calculated, and then a one sample t – test is performed. The p
value is calculated. If the p value is small, less than the level
of significance, we ______________Ho, and conclude that the initial
assumption about Ho was wrong. A better explanation for observing
data at least as extreme as in the sample we collected is that
________________ is true.
If the p value is large, that is greater than the level of
significance, we ___________________, and conclude that it would
not be unusual to observe a sample if Ho
were_____________________
Homework Answers
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The idea behind Hypothesis testing: consider this example Ho:
The mean birthweight of a baby is...
Suppose that we want to test the hypothesis that mothers with low socioeconomic status (SES) deliver babies whose birthweights are different than "normal"
Parts a) and c) are correct, please answer b) and d) (the answers selected may or may not be correct).Suppose that we want to test the hypothesis that mothers with low socioeconomic status (SES) deliver babies whose birthweights are different than "normal". To test this hypothesis, a list of birthweights from 92 consecutive, full-term, live-born deliveries from the maternity ward of a hospital in a low-SES area is obtained. The mean birghweight is found to be 116 oz with a...
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) H0 : μ 17.5 against HA: μ > 17.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal...
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...
Suppose that we want to test the hypothesis that mothers with low socioeconomic status (SES) deliver babies whose bir...
Suppose that we want to test the hypothesis that mothers with
low socioeconomic status (SES) deliver babies whose birthweights
are different than "normal". To test this hypothesis, a list of
birthweights from 87 consecutive, full-term, live-born deliveries
from the maternity ward of a hospital in a low-SES area is
obtained. The mean birghweight is found to be 115 oz with a sample
standard deviation of 25 oz. Suppose that we know from nationwide
surveys based on millions of deliveries that...
In order to conduct a hypothesis test for the population mean, a random sample of 20...
In order to conduct a hypothesis test for the population mean, a random sample of 20 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 12.9 and 2.4, respectively. (You may find it useful to reference the appropriate table: z table or ttable). Ho : μ 12.1 against HA: μ > 12.1 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places...
In order to conduct a hypothesis test for the population mean, a random sample of 24...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find it useful to reference the appropriate table: z table or t table) H0 : μ s 4 , 5 against HA: μ > 4 . 5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations...
In order to conduct a hypothesis test for the population mean, a random sample of 24...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 6.3 and 2.5, respectively. (You may find it useful to reference the appropriate table: z table or t table). H0: μ ≤ 5.1 against HA: μ > 5.1 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal...
In order to conduct a hypothesis test for the population mean, a random sample of 24...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find it useful to reference the appropriate table: z table or t table) HOT #3 4.5 against Ha: > 4.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
I need help with questions A-1 and B-1. Thanks Consider the following hypotheses: HO: u =...
I need help with questions A-1 and B-1.
Thanks
Consider the following hypotheses: HO: u = 120 HA: U 120 The population is normally distributed with a population standard deviation of 46. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 132 and n = 50. (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) %...
6. Testing a population mean, Methods (Exercise 9.23 eBook Consider the following hypothesis test: Ho: ?...
6. Testing a population mean, Methods (Exercise 9.23 eBook Consider the following hypothesis test: Ho: ? 12 Ha: ? > 12 A sample of 25 provided a sample mean T -14 and a sample standard deviation s 4.32. a. Compute the value of the test statistic (to 2 decimals). b. Use the t distribution table (Table 2 in Appendix B) to compute a range for the p-value. The p-value is Select Answer the next three questions using the critical value...
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) H0 : μ 17.5 against HA: μ > 17.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal...
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...
Suppose that we want to test the hypothesis that mothers with
low socioeconomic status (SES) deliver babies whose birthweights
are different than "normal". To test this hypothesis, a list of
birthweights from 87 consecutive, full-term, live-born deliveries
from the maternity ward of a hospital in a low-SES area is
obtained. The mean birghweight is found to be 115 oz with a sample
standard deviation of 25 oz. Suppose that we know from nationwide
surveys based on millions of deliveries that...
In order to conduct a hypothesis test for the population mean, a random sample of 20 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 12.9 and 2.4, respectively. (You may find it useful to reference the appropriate table: z table or ttable). Ho : μ 12.1 against HA: μ > 12.1 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find it useful to reference the appropriate table: z table or t table) H0 : μ s 4 , 5 against HA: μ > 4 . 5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations...
In order to conduct a hypothesis test for the population mean, a random sample of 24 observations is drawn from a normally distributed population. The resulting sample mean and sample standard deviation are calculated as 4.8 and 0.8, respectively. (You may find it useful to reference the appropriate table: z table or t table) HOT #3 4.5 against Ha: > 4.5 a-1. Calculate the value of the test statistic. (Round all intermediate calculations to at least 4 decimal places and...
I need help with questions A-1 and B-1.
Thanks
Consider the following hypotheses: HO: u = 120 HA: U 120 The population is normally distributed with a population standard deviation of 46. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 132 and n = 50. (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) %...
6. Testing a population mean, Methods (Exercise 9.23 eBook Consider the following hypothesis test: Ho: ? 12 Ha: ? > 12 A sample of 25 provided a sample mean T -14 and a sample standard deviation s 4.32. a. Compute the value of the test statistic (to 2 decimals). b. Use the t distribution table (Table 2 in Appendix B) to compute a range for the p-value. The p-value is Select Answer the next three questions using the critical value...
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