Question

1. Suppose we suspected an unusual distribution of blood groups in patients undergoing a certain surgical procedure. The data below gives the results for 100 patient’s blood type:

O A B AB

35 25 30 10

We want to test the hypothesis that the population served by the hospital that performs the surgery is 30% group O, 20% group A, 40% group B, and 10% group AB. Test at an alpha level of 0.05. Find the test statistic.

a 3.68

b 1.98

c 9.49

d 4.58

2. Use the following set of observed frequencies to test the independence of the two variables. Variable one has values of 'A' and 'B'; variable two has values of 'C', 'D', and 'E'.

C | D | E | |

A | 12 | 10 | 8 |

B | 20 | 24 | 26 |

Using *a* = 0.05, the estimates of the expected frequency
in row 1 (A) column 1 (C) when the two variables are independent is
_______.

a 9.6

b 12

c 16

d 10

3. For the following ANOVA table, the df Treatment value is ___________.

Source of Variation | SS | df | MS | F |

Treatment | 150 | |||

Error | 40 | 20 | ||

Total | 23 |

a 43

b 3

c 1.15

d 460

4. A researcher is interested in using a chi-square test of independence to determine if age is independent of minutes spent reading. Age is divided into four categories while minutes spent reading is classified as high, medium, low. The number of degrees of freedom for this test is 12

a true

b false

5. Each person in a random sample of 54 students living in the
dorms at a large university was asked whether he or she preferred
to study in the dorm room, in the dorm’s study lounge, or at the
university library. The resulting data is summarized in the table
below.

Dorm Room | Study Lounge | Library |

14 | 17 | 23 |

In a hypothesis test to determine if there is evidence that the three locations are not equally preferred by students at the university who live in the dorms, what is the expected count for the library category?

a. 54

b. 18

c. 20

d. 12

e. 10

Answer #1

Que.1

Observation table:

Oi | Pi | Ei=N*Pi | (Oi-Ei)2/Ei |

35 | 0.3 | 30 | 0.8333333 |

25 | 0.2 | 20 | 1.25 |

30 | 0.4 | 40 | 2.5 |

10 | 0.1 | 10 | 0 |

N = 100 | 4.5833333 |

Test statistic,

Que.2

Observation table:

C | D | E | Total | |

A | 12 | 10 | 8 | 30 |

B | 20 | 24 | 26 | 70 |

Total | 32 | 34 | 34 | 100 |

Que.3

df (treatment) = df(Total) - df(error) = 23 - 20 = 3

Que.4

False.

Degrees of freedom = (r-1) (c-1) = (4-1) (3-1) = 6

Que.5

Expected count = N *P(library) = 54 *(1/3) = 18

Where N = 14 +17 +23 = 54

Suppose a cognitive psychologist conducts a study on the effects
of long-term substance use on short-term memory. The researcher
recruits a total of 30 participants, where 10 participants are
identified as marijuana users, 10 participants are alcohol users,
and 10 participants identify as using no substances. Participants
in each group were given a list of 20 nouns to memorize for 15
minutes. Participants were then given a 15- minute break and then
asked to write down/recall as many of the...

A study of reading comprehension in children compared three
methods of instruction. The three methods of instruction are called
Basal, DRTA, and Strategies. As is common in such studies, two
pretest variables were measured before any instruction was given.
One purpose of the pretest was to see if the three groups of
children were similar in their comprehension skills prior to the
start of the study. The READING data set described in the Data
Appendix gives two pretest measures that...

1- Chemotherapy may cause patients to experience GI
problems because:
a.The chemotherapy drug increases blood flow to the
tumor
b.The chemotherapy drug causes an allergic
reaction
c.The chemotherapy drug affects rapidly-dividing
epithelial cells
d.The chemotherapy drug is difficult to
metabolize
2- The primary goal of medical nutrition therapy for
cancer patients is:
a.To ensure adequate intake of fluids
b.To ensure adequate micronutrient intake
c.To prevent cachexia
D. To increase body weight
3- Which of the following nutrient recommendations for
HIV...

1. For a pair of sample x- and y-values, what is the difference
between the observed value of y and the predicted value of y? a) An
outlier b) The explanatory variable c) A residual d) The response
variable
2. Which of the following statements is false:
a) The correlation coefficient is unitless. b) A correlation
coefficient of 0.62 suggests a stronger correlation than a
correlation coefficient of -0.82. c) The correlation coefficient,
r, is always between -1 and 1....

I. Solve the following problem:
For the following data:
1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6 n = 12
b) Calculate
1) the average or average
2) quartile-1
3) quartile-2 or medium
4) quartile-3
5) Draw box diagram (Box & Wisker)
II. PROBABILITY
1. Answer the questions using the following
contingency table, which collects the results of a study to 400
customers of a store where you want to analyze the payment
method.
_______B__________BC_____
A...

MATHEMATICS
1. The measure of location which is the most likely to
be
influenced by extreme values in the data set is the a. range
b.
median c. mode d. mean
2. If two events are independent, then a. they must be
mutually
exclusive b. the sum of their probabilities must be equal to one
c.
their intersection must be zero d. None of these alternatives
is
correct. any value between 0 to 1
3. Two events, A and B,...

Question 1.) The client has a diagnosis
of primary hypertension (HTN). Which sign and symptom would the
client complain of? Select one:
a. nosebleeds
b. blurred vision
c. headache
d. No sign or symptoms
Question 2.) A 75-year-old male is
brought to the emergency department. He is complaining of chest
pain, headaches, and blurred vision. He states that he has a
history of hypertension but has not been taking his medication. He
has been under a great deal of stress...

1. A city official claims that the proportion of all commuters
who are in favor of an expanded public transportation system is
50%. A newspaper conducts a survey to determine whether this
proportion is different from 50%. Out of 225 randomly chosen
commuters, the survey finds that 90 of them reply yes when asked if
they support an expanded public transportation system. Test the
official’s claim at α = 0.05.
2. A survey of 225 randomly chosen commuters are asked...

PLEASE READ THE ARTICLES ATTACHED AND ANSWER THE
FOLLOWING QUESTION. THE ARTICLES ARE BOTH LISTED
PLEASE PROVIDE DETAILED EXPLANATIONS.
PLEASE WRITE ONE REFLECTION COMBINING BOTH
ARTICLES.
The purpose of the Article Reflection is to deepen your
engagement with the topic of Epidemiology. It will give you the
opportunity to reflect on the current real-life epidemiological
issues at hand and help to bring meaning to them.
ARTICLE 1:
A group of students knew they had covid-19. They hosted
a party over...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 42 minutes ago

asked 50 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago