229 CP 21
Two Sample Tests and Comparing the Means of Two Related Samples
An experimental design for a paired t test has 25 pairs of identical twins. How many degrees of freedom
are there in this t test?
N(number of participate)-1=24
Target vs Walma
Question: A couple of days ago, Simon found a $20 bill on the ground and was pleased. Today,
the $20 bill fell out of his pocket. When he realized this, Simon was very upset. Simon was more
upset about the loss of the $20 than he was happy about finding i
Question: Howie and Nicole had four cups of coffee right before their final exam. As the final
was being passed out both Howie and Nicole experienced shaky hands and increased heart
beat. Howie concluded that he was very nervous and Nicole thought that sh
1. In its standardized form, the normal distribution
has a mean of 0 and a standard deviation of 1.
has a mean of 1 and a variance of 0.
has an area equal to 0.5.
cannot be used to approximate discrete probability distributions.
Question: Who is likely to experience the greatest life satisfaction and the best health?
Student answered: a) Moses, who is happily married
Correct answer is: a) Moses, who is happily married
Question: All of the following changes in adolescents cause th
Question: Regular cardiovascular exercise has been shown to contribute to
all of the following conditions EXCEPT:
Correct answer is: c) reduced storage of negative memories
Question: A health care provider who uses the biopsychosocial model
what was the problem of the two wills that Augustine experienced prior to becoming
Answer: Augustine is struggling with several religious and faith problems throughout his life. In
his early stage of life, he embraces the ide
1. Basil of Caesarea: - father of eastern Monasticism
- developed a kind of monasticism that might be described an urban monasticism
- close to cities and villages where the monastic community could provide various forms of
2. John Cassian:
1. Compare and contrast the theologies of Martin Luther and John Calvin. Be
sure to focus on their main themes.
Martin Luther and John Calvin are both influential theologians and reformers from the 16th
century. Their ideas, in some ways, are similar. The
Between the Pains
Theme: risk, big decision
Like any other Ernest Hemingway story, the language in Hills Like White Elephants
remains as barebones as possible. He uses simple words to emphasize
229 CP 17 Problems
Hypothesis Testing with the t test
If the sample of n = 16 selected from a normal population, = 56 and S = 12, what is the value of tstat if
you are testing null Hypothesis H0 : ?
t Test for Hypothesis of the Mean
Question: Karim likes to try new things. Recently he started skydiving, but he has also tried
tango dancing, joined a soccer league, and tried learning a new language. Karim may have
been born with a gene that caused him to have low levels of:
Why shouldn't we infer causality from correlation?
there are two reasons, one if because of the third variable, and the other is directionality problem
the third variable that could cause both varibles
directionality means a problem with 2 var
There are four forms of individual performances in a group setting
social facilitation: presence of others can help the individual perform better
social inhibition: presence of others cause the individual perform worse
social loafing: when one
1. PTSD: post traumatic stress disorder, is an anxiety disorder that may develop after
exposure to a terrifying event
2. psychotherapy: a planned, emotionally charged, confiding interaction between
a trained, socially sanctioned healer and a sufferer
229 CP 16 Problems
Hypothesis Testing Methodology
If you use a 0.05 level of significance(95% confidence level) in a two-tailed hypothesis test. What
decision will you make if Zstat = -0.76?
Using commonly use chart! Because -0.76 is between 1.96 and -
229 CP 18 Problems
Hypothesis Testing and One Tailed Tests
In a one-tailed hypothesis test where you reject H0 only in the upper tail, what is the p-value if Zstat =
Look up p value table: p-value=1-0.9772=0.0228 why using 1 minus 0.9772
229 CP 19 Problems
Z Test of Hypothesis for the Proportion
If, in a random sample of 400 items, 88 are defective, what is the sample proportion of defective
In problem 2, if the null hypothesis is that 20% of the items in a popu
229 CP 20 Problems
Two Sample Tests and Comparing the Means of Two Independent Samples
Assume that you have a sample of n1 = 8, with the sample mean X1 = 42, and a sample standard
deviation S1 = 4, and you have an independent sample of n2 = 15 from ano
CH 1 SOLUTIONS TO END-OF-CHAPTER EXERCISES
Answers to Thinking Critically Questions
1. When economists assume that people are rational, they assume that people use all available
information as they act to achieve their goals, weighing the benefits and cos