Log inSign up for FREE
Library

Lesson 5.6 Normal Model HW due 2/21

Last updated over 1 year ago
10 questions
Required
1

The weights of newborn babies are normally distributed with a mean of 6.7 pounds and a standard deviation of 1.2 pounds.
Give the normal model for this situation, check our notes for the correct notation.

Required
3
The weights of newborn babies are normally distributed with a mean of 6.7 pounds and a standard deviation of 1.2 pounds.

a. z-score for a 7 lb baby = _______
b. What proportion of babies weigh less than 7 lbs?_______
c. What proportion of babies weight more than 7 lbs? _______
Required
5
The weights of newborn babies are normally distributed with a mean of 6.7 pounds and a standard deviation of 1.2 pounds.
What proportion of babies will weigh between 5.8 and 8.3 pounds?

a. The z score for a 5.8 pound baby = _______
b. What proportion of babies weigh less than 5.8 lbs?_______
c. The z score for an 8.3 pound baby = _______
d. What proportion of babies weigh less than 8.3 lbs? _______
e. What proportion of babies weigh between 5.8 and 8.3 pounds? _______
Required
1

The weights of boxer puppies is normally distributed with a mean of 15.6 grams and a standard deviation of 2.3 grams.
Give the Normal Model for this situation. Check our notes for the correct notation.

Required
3
The weights of boxer puppies is normally distributed with a mean of 15.6 grams and a standard deviation of 2.3 grams.
a. What is the z score for a 15 gram puppy? _______ Remember to round to two places past the decimal point.
b. What proportion of boxer puppies weigh less than 15 grams?_______
c. What proportion of boxer puppies weigh more than 15 grams? _______
Required
5
The weights of boxer puppies is normally distributed with a mean of 15.6 grams and a standard deviation of 2.3 grams. We are interested in the proportion of puppies that weigh between 10.6 and 18.5 grams.
a. What is the z score for a 10.6 gram puppy? _______ Remember to round to two places past the decimal point.
b. What proportion of boxer puppies weigh less than 10.6 grams?_______
c. What is the z score for an 18.5 gram puppy?_______
d. What proportion of boxer puppies weigh less than 18.5 grams? _______
e. What proportion of boxer puppies weight between 10.6 and 18.5 grams? _______
Required
1

Following a normal distribution, the mean number of sunflower seeds harvested from a sunflower is 349 seeds with a standard deviation of 29 seeds.
Give the Normal Model for sunflower seeds. Check our notes for the correct notation.

Required
2
Following a normal distribution, the mean number of sunflower seeds harvested from a sunflower is 349 seeds with a standard deviation of 29 seeds.
a. What is the z score for a sunflower that produces 375 seeds? _______
b. What percent of sunflowers will produce less than 375 seeds? _______
Required
2
Following a normal distribution, the mean number of sunflower seeds harvested from a sunflower is 349 seeds with a standard deviation of 29 seeds.
a. What is the z score for a sunflower that produces 315 seeds? _______
b. What percent of sunflowers will produce more than 315 seeds? _______
Required
3
Following a normal distribution, the mean number of sunflower seeds harvested from a sunflower is 349 seeds with a standard deviation of 29 seeds.
Find the proportion of sunflowers that will produce from 300 to 400 seeds.
a. What percent of sunflowers will produce less than 300 seeds? _______
c. What percent of sunflowers will produce less than 400 seeds? _______
d. What percent of sunflowers will produce from 300-400 seeds? _______