question 3d pls (a) Find the value of the test statistic for the above hypothesis. (b)...
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...
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...
The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. The standard deviation of weights of bears is known to be 12.9 lb. A researcher takes a sample of 44 bears and based on this sample, they test the hypothesis that the average weight of a bear in Yellowstone National Park is different from 180 lb. The p-value was calculated to be 0.1336. What was the average weight of bears in...
The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lb. Bear weights are normally distributed with standard deviation σ = 121.8 lb. (a) Find a 95% confidence interval estimate of the population mean bear weight. (b) Which of the statements below gives the correct interpretation of the confidence interval constructed in part (a)? (choose a number, do not rewrite...
2. The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lb. Assume that o is known to be 121.8 lb. (a) Use a 0.05 significance level to test the claim that the population mean of all such bear weights is greater than 150 lb. Use the usual critical-value method to perform this test. (b) Find the P-value for this...
2. The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lb. Assume that o is known to be 121.8 lb. (a) Use a 0.05 significance level to test the claim that the population mean of all such bear weights is greater than 150 lb. Use the usual critical-value method to perform this test. (b) Find the P-value for this...
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 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...
The health of the bear population in Yellowstone National Park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lbs. Assume that the standard deviation is known to be 121.8 lbs a. Use a 0.05 significance level to test the claim that the population mean of all such a bear weight is greater than 150 pounds. Use the usual critical value method to perform this test. b. Find the...
In order to conduct a hypothesis test for the population proportion, you sample 440 observations that result in 220 successes. (You may find it useful to reference the appropriate table: z table or table) He: p > 0.52; HA: p < 0.52. 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 places.) Test statistic a-2. Find the...