Question

In: Statistics and Probability

Use the Empirical Rule to answer the questions below: The distribution of weights for newborn babies...

Use the Empirical Rule to answer the questions below:

The distribution of weights for newborn babies is approximately normally distributed with a mean of 7.4 pounds and a standard deviation of 0.8 pounds.

1. What percent of newborn babies weigh more than 8.2 pounds? %

2. The middle 95% of newborn babies weigh between and pounds.

3. What percent of newborn babies weigh less than 5.8 pounds? %

4. Approximately 50% of newborn babies weigh more than pounds.

5. What percent of newborn babies weigh between 6.6 and 9.8 pounds? %

Expert Solution

The empirical rule states that:

1. What percent of newborn babies weigh more than 8.2 pounds?

2. The middle 95% of newborn babies weigh between and pounds?

and

3. What percent of newborn babies weigh less than 5.8 pounds?

4. Approximately 50% of newborn babies weigh more than pounds?

5. What percent of newborn babies weigh between 6.6 and 9.8 pounds?

orchestra answered 2 years ago

The distribution of weights of newborn babies is bell shaped with a mean of 3200 grams...

The distribution of weights of newborn babies is bell shaped with a mean of 3200 grams and standard deviation of 450 grams. a. what percentage of newborn babies weigh between 2300 and 4100 grams? I have already done part A Part b asks What percentage of newborn babies weigh less then 2300 grams? I need to know how to do that on a ti84 plus calculator

Weights of newborn babies in a certain state have normal distribution with mean 5.33 lb and...

Weights of newborn babies in a certain state have normal distribution with mean 5.33 lb and standard deviation 0.65 lb. A newborn weighing less than 4.85 lb is considered to be at risk, that is, has a higher mortality rate. (a) A baby just born in this state is picked at random. The probability that the baby is at risk is about (a) 0.43 (b) 0.33 (c) 0.23 (d) 0.13 (e) 0.53 (b) The hospital wants to take pictures of...

Now, don't use the Empirical Rule to answer the same three questions. Be more precise and...

Now, don't use the Empirical Rule to answer the same three questions. Be more precise and use the Normal CDF table, giving the percentage (all to 2 decimal places) of PE ratios that fall between. The price-earnings (PE) ratios of a sample of stocks have a mean value of 10.25 and a standard deviation of 2.6. If the PE ratios have a bell shaped distribution D. 7.65 and 12.85. Percentage = % E. 5.05 and 15.45. Percentage = % F. 2.45 and...

The weights for newborn babies is approximately normally distributed with a mean of 5lbs and a...

The weights for newborn babies is approximately normally distributed with a mean of 5lbs and a standard deviation of 1.5lbs. Consider a group of 1,000 newborn babies: How many would you expect to weigh between 4-7lbs? How many would you expect to weigh less than 6lbs? How many would you expect to weigh more than 5lbs? How many would you expect to weigh between 5-10lbs?

The weights for newborn babies is approximately normally distributed with a mean of 6.9 pounds and...

The weights for newborn babies is approximately normally distributed with a mean of 6.9 pounds and a standard deviation of 1.1 pounds. Consider a group of 1200 newborn babies: 1. How many would you expect to weigh between 6 and 9 pounds? 2. How many would you expect to weigh less than 8 pounds? 3. How many would you expect to weigh more than 7 pounds? 4. How many would you expect to weigh between 6.9 and 10 pounds?

The weights of American newborn babies are normally distributed with a mean of 119.54 oz (...

The weights of American newborn babies are normally distributed with a mean of 119.54 oz ( about 7 pounds 8 ounces) and a population standard deviation of .61 oz. A sample of 11 newborn babies is randomly selected from the population. (a) find the standard error of the sampling distribution. Round your answer to 4 decimal places. (b) Using your answer to part (a), what is the probability that in a random sample of 11 newborn babies, the mean weight...

The weights for newborn babies is approximately normally distributed with a mean of 6.4 pounds and...

The weights for newborn babies is approximately normally distributed with a mean of 6.4 pounds and a standard deviation of 1.4 pounds. Consider a group of 1100 newborn babies: 1. How many would you expect to weigh between 4 and 8 pounds? 2. How many would you expect to weigh less than 7 pounds? 3. How many would you expect to weigh more than 6 pounds? 4. How many would you expect to weigh between 6.4 and 10 pounds?

he weights for newborn babies is approximately normally distributed with a mean of 5.1 pounds and...

he weights for newborn babies is approximately normally distributed with a mean of 5.1 pounds and a standard deviation of 1.4 pounds. Consider a group of 1500 newborn babies: 1. How many would you expect to weigh between 3 and 6 pounds? 2. How many would you expect to weigh less than 5 pounds? 3. How many would you expect to weigh more than 4 pounds? 4. How many would you expect to weigh between 5.1 and 8 pounds? Get...

2. The weights of American newborn babies are normally distributed with a mean of 119.54 oz...

2. The weights of American newborn babies are normally distributed with a mean of 119.54 oz (about 7 pounds 8 ounces) and a population standard deviation of 0.67 oz. A sample of 14 newborn babies is randomly selected from the population. (a) Find the standard error of the sampling distribution. Round your answer to 4 decimal places. (b) Using your answer to part (a), what is the probability that in a random sample of 14 newborn babies, the mean weight...

Some sources report that the weights of full-term newborn babies in a certain town have a...

Some sources report that the weights of full-term newborn babies in a certain town have a mean of 99 pounds and a standard deviation of 0.60.6 pounds and are normally distributed.a. What is the probability that one newborn baby will have a weight within 0.60.6 pounds of the meanlong dash—that is, between 8.48.4 and 9.69.6 pounds, or within one standard deviation of the mean?b. What is the probability that the average of ninenine babies' weights will be within 0.60.6 pounds...