Low birth weight is a term used to describe babies who are born weighing less than 5 pounds, 8 ounces (2,500 grams). Some studies suggest that women who have their first baby at age 35 or older are at increased risk of having a baby with low birth weight. A researcher chose a random sample of 125 women age 35 or older who were pregnant with their first child and followed them through the pregnancy. The mean weight of the 125 newborns was 3111.4 grams with a standard deviation of 501.3 grams. Is there evidence to suggest low birth weight for newborns who are the first child for women over the age of 35? What type of error might have been made?
Low birth weight is a term used to describe babies who are born weighing less than 5 pounds, 8 ounces (2,500 grams). Some studies suggest that women who have their first baby at age 35 or older are at increased risk of having a baby with low birth weight. A researcher chose a random sample of 125 women age 35 or older who were pregnant with their first child and followed them through the pregnancy. The mean weight of the 125 newborns was 3111.4 grams with a standard deviation of 501.3 grams. Is there evidence to suggest low birth weight for newborns who are the first child for women over the age of 35? What type of error might have been made?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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THIS IS NOT A GRADED QUESTION SO PLEASE PLEASE ANSWER PLEASE PLEASE AT LEAST TRY TO ANSWER PLEASE ANSWER SUPER FAST
For the first image attached please do the calculations similar to the second image attached
Please do hypothesis testing for the image attached please do the 13 step write up I provided
Hypothesis Testing (13 Step Write Up for FRQs)
1. State the parameter, u or p.
2. State Ho
3. State Ha
4. State a.
5. Check the assumptions.
6. State the distribution.
7. State the name of the test.
8. State the df, if applicable.
9. Write the formula for the test statistic.
10. Write the formula for the test statistic with your specific numbers plugged in.
11. Calculate the P-value.
12. Draw a picture of the distribution with the appropriate area shaded.
13. State your conclusion - Do you reject or fail to reject Ho? Do you have or not have sufficient evidence for Ha?
- State and interpret Type 1 and Type 2 errors.
- Results are statistically significant if the null is rejected
Please please answer everything please I would really appreciate if you could please answer it it's super important and urgent. Please please answer super super fast please answer as fast as possible the fastest you can please
If it’s not hypothesis testing please use the four steps in a Cl write-up
1. Assumptions
2. Title
3. Construction of Cl
4. Interpretation
- Interpret Interval - We are % confident..
- Interpret Level - The CI Level is in reference to the accuracy of the method you are using, not the probability that the Cl you just constructed is good or bad.
- We are estimating parameters without running a census, i.e. taking statistics from out sample, adding/subtracing a MOE, and making guesses (inferences) about the population.
Transcribed Image Text:Ninety minutes are allowed for students to complete
the multiple-choice section of a national exam. A
random sample of 28 students selected from the
students at a large high school took a practice exam,
and the time (in minutes) that it took each student to
complete the multiple-choice section was recorded.
The times are given below.
58
97
64
57
Your Answer:
Data from Students
Time to Complete the Multiple Choice Section
76
66
71
75
12.
5. Assumptions:
10. t=
74
1. Random Sample
95
60
74
80
77
3. s= 10.772 minutes
68
Is there evidence at the 5% level of significance that
the mean time to complete the multiple-choice
sections for students at this school is less than 76
minutes?
52
2. Boxplot Roughly symmetric, no outliers
6. t distribution
7. 1 Sample t Mean Hypothesis Test
8. df = 27
9. t = 2
88
63
70
71
74
83
1. = true average completion time for the multiple choice section of an
exam
2. Ho = 76
:
3. Ha < 76
:
4. a = 0.05
63
81
65
73
71
82
Vi
72.429-76
= -1.754
10.772
√28
11. P value = P(t < -1.754) = tcdf (-1E99, -1.754, 27) = 0.045
=-1.7544 IP=.0454
13. Because our P-value <a, we reject Ho. We have sufficient evidence
that the true average completion times for the multiple choice section is
less than 76 minutes.
Transcribed Image Text:Low birth weight is a term used to describe babies
who are born weighing less than 5 pounds, 8 ounces
(2,500 grams).
Some studies suggest that women who have their
first baby at age 35 or older are at increased risk of
having a baby with low birth weight. A researcher
chose a random sample of 125 women age 35 or
older who were pregnant with their first child and
followed them through the pregnancy. The mean
weight of the 125 newborns was 3111.4 grams with
a standard deviation of 501.3 grams.
Is there evidence to suggest low birth weight for
newborns who are the first child for women over
the age of 35?
What type of error might have been made?
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