2. A sample of 64 account balances from a credit company showed an average daily balance...
2. A sample of 64 account balances from a credit company showed an average daily balance of $1,050. The standard deviation of the population is known to be $240. We are interested in determining if the mean of all account balances (i.e., population mean) is significantly different from $1,000.
Question: Using the p-value approach at 95% confidence, test the above hypotheses. [Hint: This is a Two-tailed Hypothesis Testing.
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2. A sample of 64 account balances from a credit company showed
an average daily balance...
A sample of 64 account balances from a credit company showed an average daily balance of...
A sample of 64 account balances from a credit company showed an average daily balance of $1,045. The standard deviation of the population is known to be $240. We are interested in determining if the mean of all account balances (i.e., population mean) is significantly different from $1,000. Question: Using the p-value approach at 95% confidence, test the above hypotheses.
A sample of 64 account balances from a credit company showed an average daily balance of...
A sample of 64 account balances from a credit company showed an average daily balance of $1,040. The standard deviation of the population is known to be $200. We are interested in determining if the mean of all account balances (i.e., population mean) is significantly different from $1,000.Using the critical value approach at 95% confidence, test the hypotheses.
A sample of 64 account balances from a credit company showed an average daily balance of...
A sample of 64 account balances from a credit company showed an average daily balance of $1040. The standard deviation of the population is known to be $200. We are interested in determining if the mean of all account balances (i.e., population mean) is significantly different from $1000. Which of the following is true The Null Hypothesis can be rejected at the 2.5% significance level The Null Hypothesis can be rejected at the 10% significance level The Null Hypothesis cannot...
A sample of 36 account balances of a credit company showed an average balance of $1,179...
A sample of 36 account balances of a credit company showed an average balance of $1,179 and a standard deviation of $136. You want to determine if the mean of all account balances is significantly greater than $1,150. Use a 0.05 level of significance. Assume the population of account balances is normally distributed. Compute the test statistic. A sample of 30 account balances of a credit company showed an average balance of $1,165 and a standard deviation of $125. You...
A sample of 20 account balances of a credit company showed an average balance of $1,180...
A sample of 20 account balances of a credit company showed an average balance of $1,180 and a standard deviation of $125. You want to determine if the mean of all account balances is significantly greater than $1,150. Assume the population of account balances is normally distributed. Compute the p-value for this test.
A sample of 81 account balances of a credit company showed an average balance of $1,200...
A sample of 81 account balances of a credit company showed an average balance of $1,200 with a standard deviation of $126. You want to determine if the mean of all account balances is significantly different from last years average balance of $1,150. Use a .05 level of significance. State the null and alternative hypothesis. A) Ho: u > 1,150 Ha: u < 1,150 B) Ho: u < 1,150 Ha: u > 1,150 C) Ho: u = 12 Ha: u...
The following data from a random sample represents the average daily energy intake in KJ for...
The following data from a random sample represents the average daily energy intake in KJ for each of the eleven healthy women: 5260 5470 5640 6180 6390 6515 6805 7515 7515 8230 8770 Interest centred on comparing these data with an underlying mean daily energy intake of 7725 KJ. This was the recommended daily intake. Departures from this mean in either direction were considered to be of interest. Assuming that the population is normal and the population variance is unknown....
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Q1. Hypothesis testing using a Z test (14 points) A professor has been teaching introductory statistics...
Q1. Hypothesis testing using a Z test (14 points) A professor has been teaching introductory statistics for many years and the final exam performance (30 points total) has been very consistent from class to class and the scores have been normally distributed. Overall, the whole data base (i.e. population) of final exam scores has a mean (μ) of 20 points and a standard deviation (σ) of 5 points. Because 20 out of 30 is only about 67%, the professor would...
answer all 21 From a population of cans of coffee marked "12 ounces." a sample of...
answer all
21 From a population of cans of coffee marked "12 ounces." a sample of 25 cans is selected and the contents of each can are weighed. The sample revealed a mean of 118 ounces with a standard deviation of 0.5 ounces. Test to see if the mean of the population is at least 12 ounces. Assume the population is normally distributed) Use a 05 level of significance. What is the value of test statistic? Not yel www.ed Point...
answer all
21 From a population of cans of coffee marked "12 ounces." a sample of 25 cans is selected and the contents of each can are weighed. The sample revealed a mean of 118 ounces with a standard deviation of 0.5 ounces. Test to see if the mean of the population is at least 12 ounces. Assume the population is normally distributed) Use a 05 level of significance. What is the value of test statistic? Not yel www.ed Point...
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