In a test of the effectiveness of garlic for lowering cholesterol, 40 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus star) in the levels of LDL cholesterol (in mgdL) have a mean of 6 and a standard deviation of 16.8. Use a 0.01 significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than 0. What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, p-value and state the final conclusion that addresses the original claim.
What are the null and alternative hypotheses?
In: Math
A technician plans to test a certain type of resin developed in a laboratory to determine the nature of the time it takes before bonding takes place. It is known that the time to bonding is normally distributed with a mean of 4.5 hours and a standard deviation of 1.5 hours. It will be considered an undesirable product if the bonding time is either less than 2 hours or more than 6 hours. a. What is the probability that the bonding time will be less than 2 hours? b. What is the probability that the bonding time will be more than 6 hours? c. How often would the performance be considered undesirable (in a value of probability)? d. Between what two times (equally before the mean and equally after the mean) accounts for the a drying time of 95%?
In: Statistics and Probability
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 15 subjects had a mean wake time of 105.0 min. After treatment, the 15 subjects had a mean wake time of 99.7 min and a standard deviation of 24.3 min. Assume that the 15 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
In: Statistics and Probability
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,23 subjects had a mean wake time of 104.0 min. After treatment, the 23 subjects had a mean wake time of 79.5 min and a standard deviation of 23.92 min. Assume that the 23 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 104.0 min before the treatment? Does the drug appear to be effective?
Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
___min< mu<___min
In: Statistics and Probability
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,13 subjects had a mean wake time of 100.0 min. After treatment, the13 subjects had a mean wake time of 93.5 min and a standard deviation of 20.7 min. Assume that the13 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
In: Statistics and Probability
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment,
25
subjects had a mean wake time of
100.0
min. After treatment, the
25
subjects had a mean wake time of
96.7
min and a standard deviation of
21.8
min. Assume that the
25
sample values appear to be from a normally distributed population and construct a
90%
confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of
100.0
min before the treatment? Does the drug appear to be effective?
Construct the
90%
confidence interval estimate of the mean wake time for a population with the treatment.
In: Statistics and Probability
Your company is an all-equity firm and has 1 million shares outstanding and its current market value is $10 million, with an operating income (EBIT) is $1.5 million. This morning your company issued $2 million of debt at a 10% coupon rate and used the proceeds to repurchase your company’s shares from the stock market. The transaction is completed before the end of the day. Your company’s cost of capital is 6% and the corporate income tax rate is 20%.
(a) What is the company’s earnings-per-share before the repurchase?
(b) How many shares of your company’s stock are repurchased on this morning?
(c) What is the company’s earnings-per-share (EPS) after the repurchase?
In: Finance
On the 1st of May 2019 Tiger Plc split its stock for 2 for 1. The cash dividend is at £0.33 a quarter. The closing share price is £39.23.
i) What is the price of the share before the split?
ii) Could the adjustment in the price per share and cash dividends have been accomplished by a share dividend? What would the size of the share dividend need to be to accomplish this goal?
iii) What is the annual dividend yield before and after the split?
iv) Calculate the payout ratio given expected annual earnings in 2019 of £2.00 per share.
v) During the past 10 years the company’s payout ratio averaged about 60%. Discuss whether this is valuable information.
In: Finance
|
Cohen Company produces and sells socks. Variable costs are $5.40 per pair, and fixed costs for the year total $76,500. The selling price is $9 per pair. |
| Required: |
| 1. | Calculate the breakeven point in units. |
| 2. | Calculate the breakeven point in sales dollars. |
| 3. |
Calculate the units required to make a before-tax profit of $45,000. |
| 4. |
Calculate the sales in dollars required to make a before-tax profit of $38,700. (Do not round intermediate calculations.) |
| 5. |
Calculate the sales, in units and in dollars, required to make an after-tax profit of $28,700 given a tax rate of 30%. (Do not round intermediate calculations. Round your answers up to the nearest whole number.) |
In: Accounting
A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 20 subjects had a mean wake time of 105.0 min. After treatment, the 20 subjects had a mean wake time of 98.5 min and a standard deviation of 21.52 min. Assume that the 20 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 105.0 min before the treatment? Does the drug appear to be effective? Construct the 95% confidence interval estimate of the mean wake time for a population with the treatment.
In: Math