Introduction to non-Calculus based Statistics Home work 7

Name:

Section: _______

Complete your answers logically in the spaces provided. Give final answers/conclusions in complete sentences in context of the question. 1. Carry out complete 5 steps of hypothesis testing using traditional method and alongside that, show p-value estimates that confirm your conclusions on any ttests that are carried out for this question. Below is data on number of tree species in 12 unlogged forest plots and 9 similar plots logged 8 years ago. Unlogged Logged 22 17 18 4 22 18 20 14 15 18 21 15 13 15 13 10 19 12 13 19 15

a. Test at the 5% significant level that mean number of species in logged plots is significantly lower than the mean number of species in unlogged plots after 8 years. (5 marks)

Home work 7

1

MATH1050 Y –B FW2012

Introduction to non-Calculus based Statistics

b. Identify the outlier. If it is removed, does your conclusion change for the 5% significant level test in a. (carry out the final test again assuming no change in your conclusion about your test on variances in part a.) (5 marks)

2. Exercises 8-3; Question number 14 of the text (Triola). The Alberta government records freezing dates for over a hundred locations around the province. Based on average last frost dates for spring, a researcher has proposed dividing the province into early last-frost locations and late last-frost locations. Refer to Data set 17 of the text book in Appendix B. (in the CD). Use the day of year columns to test, at the 0.01 significance level, the claim that the late last frost locations have a different mean date for last spring frost than the early last-frost locations.(Use calculators to find the mean, standard deviation and variances etc)

Home work 7

2

MATH1050 Y –B FW2012

Introduction to non-Calculus based Statistics

a. Conduct the hypothesis test using the traditional method. (5 marks)

...Name: Lindsey Weber
Exercise2: Skeletal Muscle Physiology: Activity 5: Fatigue in Isolated Skeletal Muscle Lab Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. When skeletal muscle twitches fuse so that the peaks and valleys of each twitch become indistinguishable from each
other, the muscle is in a state known as
You correctly answered: d. complete (fused) tetanus.
2. When the stimulus frequency reaches a value beyond which no further increase of skeletal muscle force can occur, the
muscle has reached its
You correctly answered: c. maximal tetanic tension.
3. A decline in a muscle's ability to maintain a constant level of force, or tension, after prolonged, repetitive stimulation is
called
You correctly answered: c. fatigue.
4. Which of the following is not thought to be a contributing factor to the development of fatigue?
You correctly answered: a. buildup of Ca2+ in the muscle fibers
02/17/14
page 1
Experiment Results
Predict Question:
Predict Question: If the stimulator is briefly turned off for defined periods of time, what will happen to the length of time that
the muscle is able to sustain maximal developed tension when the stimulator is turned on again?
Your answer : b. The length of the rest period will proportionately increase the length of time for sustained muscle tension.
Stop & Think Questions:
Why does the stimulated muscle force...

...Exercise2: Skeletal Muscle Physiology: Activity 1: The Muscle Twitch and the Latent Period Lab Report Pre-lab Quiz Results You scored 20% by answering 1 out of 5 questions correctly. 1. Skeletal muscles are connected to bones by Your answer : c. ligaments. Correct answer: b. tendons. 2. Skeletal muscles are composed of hundreds to thousands of individual cells called Your answer : b. myofibrils. Correct answer: c. fibers. 3. The term motor unit refers to Your answer : b. all of the activated muscle fibers within one skeletal muscle. Correct answer: c. one motor neuron and all of the skeletal muscle fibers it innervates. 4. The motor neuron and muscle fiber intersect at what is called You correctly answered: d. the neuromuscular junction. 5. A twitch is Your answer : c. multiple contractile responses to a series of action potentials. Correct answer: a. one contractile response to a single action potential.
03/01/13
page 1
Experiment Results Predict Question: Predict Question: Will changes to the stimulus voltage alter the duration of the latent period? Your answer : a. Yes, changing the stimulus voltage will change the latent period duration proportionately. Stop & Think Questions: What is the period of time that elapses between the generation of an action potential and the start of muscle tension development in a muscle fiber? Your answer : d. the recess period Correct answer: c. the latent period What...

...Web Calculator Exercise2
Daniel Alvarado
Liberty University
Z test & One sample t-test
1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a mean SAT score of 1030 is obtained. The average score for public high school student is 1000 (σ= 200).
a. Is this a one- or two tailed test?
This test is a one – tailed test, because the researcher wants to know that students who attend private high school will have a higher Sat score, which makes the alternative hypothesis a prediction in favor of the private school over the public high school.
b. What are H0 and Ha for this study?
The Hₒ foe the study is that the mean of the private school will be less than the mean from the public school.
The Hₐ for this study is that the mean of the public school is higher than the mean for the public school.
c. Compute Z obt
To compute the Z obt we take the 200 which is the standard diviation and the 90 which is the sample size and plug in to the formula for standard error: 200divided by the square root of 90 = 21.082
d. What is the Z critical value (Z cv ) using a 0.05 alpha level?
Z cv for 005 alpha level is -1.6449
e. Should H0 be rejected? What should...

...Exercise2: Skeletal Muscle Physiology: Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. During a single twitch of a skeletal muscle You correctly answered: b. maximal force is never achieved. 2. When a skeletal muscle is repetitively stimulated, twitches can overlap each other and result in a stronger muscle contraction than a stand-alone twitch. This phenomenon is known as You correctly answered: c. wave summation. 3. Wave summation is achieved by You correctly answered: a. increasing the stimulus frequency (the rate of stimulus delivery to the muscle). 4. Wave summation increases the force produced in the muscle. Another way to increase the force produced by a muscle is to You correctly answered: d. increase the number of activated motor units.
02/20/13
page 1
Experiment Results Predict Question: Predict Question 1: As the stimulus frequency increases, what will happen to the muscle force generated with each successive stimulus? Will there be a limit to this response? Your answer : d. As the stimulus frequency increases, the muscle force generated by each successive stimulus will first increase and then decrease as the stimulus frequency becomes very high. Predict Question 2: In order to produce sustained muscle contractions with an active force value of 5.2 grams, do...

...In dealing with non-pooled statistics in two different scenarios, or samples in this case. One is Standard Deviations and Assumed Equal. You can be somewhat certain that the populations have nearly equal standard deviations, and then you should use a pooled-t method. If you were really uncertain then you would use a non-pooled t-method. And with the SRS’s separate samples or normal populations, large samples are not satisfied; then the non-pooled-t methods should not be used.
As for two population means using paired samples. In each paired sample there will be a member of one population and then a member of the second group. For the simple random paired sample each one that is already selected.
Confidence intervals for one population proportion. The margin of error is quite simple; it explains how precise your estimates can be. The book states that; “the margin of error of an estimator represents the precision with which it estimates the parameter in question.” This section talks about proportions of sample (p) and population (p) determine the margin of error and then briefly mentions the sample sizes of estimating (p).
There are also hypotheses test for one population proportion. The one proportion z-test is also known as the one sample z-test for a population and the one variable proportion test. The proportion z-test can be performed by figuring out if the hypothesis is right, left, or two-tailed. Once you have figured out that you can move onto...

...Cleveland, Texas, Houston, San Francisco, and Kansas City.
2.
Difference
163
55
-5
88
51
16
-214
Wins
0.599
0.537
0.531
0.481
0.494
0.506
0.383
Construct a scatter plot, find the value of the linear correlation coefficient r, and find the critical values of r from Table VI, Appendix A, p. A-14, of your textbook Elementary Statistics.
Use α = 0.05.
Is there sufficient evidence to conclude that there is a linear correlation between the proportion of wins and the above difference?
The null hypothesis is = 0 which shows the linear correlation is not significant.
The alternative hypothesis where it is
using the p-value:
p-value =2p(t>test statistic)
=2p(t>3.9833)
=2[1-p(t 3.9833)]
=2(0.005248)
=0.010496
Clearly this shows that the p-value is less than 0.05 which shows the linear relationship is not significant.
3. Given below is a control chart for the temperature of a freezer unit in a restaurant. The owner of the restaurant is deciding whether or not to buy a new unit. The two charts display the temperature for the past two weeks. Write a paragraph analyzing the control charts and argue whether the owner should buy a new unit or not. (5-6 sentences).
I would counsel the owner to purchase the new unit. The two charts below show a large variation in temperatures. When storing food for freshness large variations in temperature over time can allow bacteria growth and cause food spoilage. The large warm spike in...

...Both Adonis and Attis may be considered "resurrection gods." True
What are the two names for Aphrodite that are linked with the islands of Cythera and Cyprus? (Spell them carefully.) Cytherea and Cypris
According to one tradition, Aphrodite is the daughter of Zeus and _____. Dione
What is the distinction between Aphrodite Urania and Aphrodite Pandemos? Urania: sprung from Uranus alone ; Pandemos: sprung from Zeus and Dione
According to our textbook, Aphrodite is the goddess of love, beauty, and _____. marriage
What item does Aphrodite possess that makes her irresistible? a magical golden girdle
Describe briefly the birth of Aphrodite as depicted on the Ludovisi throne. (If you are ever in Rome, stop by the Terme Museum to see her.) Aphrodite was born through
the foam of the sea, being the beautiful daughter of Zeus and the sea nymph Dione and was dressed by two attendants.
The sculptor _____ was responsible initially for portraying Aphrodite in the nude. Praxiteles
By what more common name do we know the Aphrodite of Melos? Venus de Milo
To what European museum and city must one travel to see the Aphrodite of Melos? Going to Paris and seeing her in the Louvre
The Charites are also called the _____. Graces
The Graces are generally _____ in number. Three
The Seasons are also called the _____. Horae
Images of the phallic fertility god _____ were found in gardens and house entrances. Priapus
What is the mythological...

...Chapter 6Activity6-26-3
Please View Videos or discussions in Mastering Biology relating to Ch6 Sec 2 and 3
http://www.pearsonmylabandmastering.com/northamerica/masteringbiology/
Use of Test Books and notes will be very helpful.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) When solid sodium hydroxide is added to water, the solution gets hot. This is an example of a(n) 1) _______
A) endergonic process.
B) exergonic process.
C) enzyme-catalyzed process.
D) release of activation energy.
E) conversion of kinetic energy to potential energy.
2) Why is photosynthesis considered an endergonic reaction? 2) _______
A) Activation energy is not required.
B) Photosynthesis does not comply with the physical laws of the universe.
C) Sugar has less energy than the sun.
D) Protein catalysts are not needed.
E) Low-energy reactants are converted to high-energy products.
3) Activation energy is necessary for all ________ reactions. 3) _______
A) exergonic B) endergonic C) coupled D) chemical
4) An ________ chemical reaction releases energy, whereas an ________ reaction requires an input of energy. 4) _______
A) exergonic; endergonic
B) endergonic; exergonic
C) enzymatic; endergonic
D) endergonic;...