Question

The relief time provided by a standard dose of a popular children’s allergy medicine averages six...

The relief time provided by a standard dose of a popular children’s allergy medicine averages six hours with a standard deviation of two hours. [You may find it useful to reference the z table.] a. Determine the percentage of children who experience relief for less than four hours if the relief time follows a normal distribution. (Round your answer to 2 decimal places.) b. Determine the percentage of children who experience relief for less than four hours if the relief time follows a lognormal distribution. (Round your intermediate calculations to at least 4 decimal places, “z” value to 2 decimal places, and final answer to 2 decimal places.)

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. Let Z be the z-score for a standard normal distribution. Find the area under the...
1. Let Z be the z-score for a standard normal distribution. Find the area under the curve for Z> -1.58. Keep four decimal places. 2. Suppose the time spent by children in front of the television set per year is normally distributed with a mean of 1500 hours and a standard deviation of 250 hours. What percentage of children spend at least 1300 hours in front of the television. Express your answer to the nearest tenth of a percent without...
Suppose that the time spent by children in front of the television set per year has...
Suppose that the time spent by children in front of the television set per year has a distribution   N(1500, 250); i.e, normal with mean 1500 and standard deviation 250. What proportion of children spend less than 1000 hours in front of the television? (Express your answer as a decimal, do not convert to percent. Keep four decimal places.) What proportion of children spend more than 1700 hours in front of the television? (Express your answer as a decimal, do not...
In a study of parents’ perceptions of their children’s size, researchers Kaufman et al. (Current Biology,...
In a study of parents’ perceptions of their children’s size, researchers Kaufman et al. (Current Biology, 2013) asked parents to estimate their youngest child’s height. The researchers hypothesized that parents tend to underestimate their youngest child’s size because the youngest child is the baby of the family and everybody else is the family appears bigger compared to the baby. The sample of 33 parents who were surveyed underestimated their youngest child’s height by 7.3 cm, on average; the standard deviation...
Let be a standard normal random variable. Use the calculator provided, or this table, to determine...
Let be a standard normal random variable. Use the calculator provided, or this table, to determine the value of P (c is less than or greater to Z is less than or greater to -0.87) =0.1570. Carry your intermediate computations to at least four decimal places. Round your answer to two decimal places
The director of research and development is testing a new medicine. She wants to know if...
The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.0250.025 level that the medicine relieves pain in less than 305305 seconds. For a sample of 1717 patients, the average time in which the medicine relieved pain was 299299 seconds with a standard deviation of 2525. Assume the population distribution is approximately normal. 1. State the null and alternative hypotheses. 2. Find the value of the test statistic. Round...
In a recent survey of high school students, it was found that the amount of time...
In a recent survey of high school students, it was found that the amount of time spent on reading books per week was normally distributed with a mean of 28 minutes. Assume the distribution of weekly reading time follows the normal distribution with a population standard deviation of 2 minutes. Suppose we select a sample of 16 high school students. What can we say about the shape of the distribution of the sample mean time? What can we say about...
The director of research and development is testing a new medicine. She wants to know if...
The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.05 level that the medicine relieves pain in more than 375 seconds. For a sample of 17 patients, the average time in which the medicine relieved pain was 383 seconds with a standard deviation of 20. Assume the population distribution is approximately normal. Step 1 of 3: State the null and alternative hypotheses. Step 2 of 3: Find the...
Question 11 A retailer finds that the demand for a very popular board game averages 100...
Question 11 A retailer finds that the demand for a very popular board game averages 100 per week with a standard deviation of 20. If the seller wishes to have adequate stock 90% of the time, how many of the games must she keep on hand? a. 139.2 b. 125.6 c. 132.9 d. 100.0 e. 195.0 Question 13 A new car salesperson knows that he sells cars to one customer out of 20 who enter the showroom. The probability that...
A small hair salon in Denver, Colorado, averages about 85 customers on weekdays with a standard...
A small hair salon in Denver, Colorado, averages about 85 customers on weekdays with a standard deviation of 17. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $5 discount on 6 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 6 weekday period jumps to 99. a. What is the probability to get a sample...
The director of research and development is testing a new medicine. She wants to know if...
The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.025 level that the medicine relieves pain in more than 318 seconds. For a sample of 7 patients, the average time in which the medicine relieved pain was 324 seconds with a standard deviation of 23. Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. Step 2 of 5: Find the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT