Question

To test the effectiveness of a lesson, a teacher gives randomly selected students a pretest and follow-up test. The results are given below.

Student | A | B | C | D | E | F | G | H |
---|---|---|---|---|---|---|---|---|

Before | 6 | 8 | 5 | 4 | 3 | 5 | 4 | 7 |

After | 9 | 10 | 8 | 7 | 6 | 8 | 7 | 10 |

(a) At the 0.025 significance level, test the claim that the lesson was effective.

Original claim is made by Answer hypothesis.

Original claim is: u_{d} Answer 0.

Test statistic: Answer

Critical value: Answer

P-value: Answer

Initial conclusion: We Answer the null hypothesis.

Final conclusion: There Answert enough evidence to support the
claim.

(b) Construct a 95% confidence interval for the difference between
the two proportions.

Answer< p_{men} - p_{women}<Answer

Answer #1

No data was given for part (b).

In a survey, 500 men and 500 women were randomly selected. Among
the men, 52 had been ticketed for speeding within the last year,
whereas 27 of the women had been ticketed for speeding during the
same period (based on data from R. H. Bruskin Associates).
(a) At the 0.01 significance level, test the claim that women
have lower rate of speeding tickets.
Original claim is made by the Answer hypothesis.
Original claim is: pwomen - pmenAnswer
0.
Test statistic:...

True OR False Question
A teacher gives a 30-point test to 10 students. The
scores are shown here. Find the percentile rank of the score of 6,
8, 12, 12,12, 15, 17, 18, 25, 30
The percentile Rank for the score of 25 is 85% or 85
Percentile.
TRUE
FALSE

Suppose a teacher gives her statistics class a four-question,
multiple-choice quiz at the beginning of the semester to measure
how well prepared they were for the class. The accompanying table
shows the number of students who had 0, 1, 2, 3 and 4 questions
correct. Using α = 0.05, perform a chi-square test to determine if
the number of correct answers per student follows the binomial
probability distribution.
Number of
Correct Answers
per Student
Frequency
0
5
1
6
2...

A telephone company claims that the service calls which they
receive are equally distributed among the five working days of the
week. A survey of 110 randomly selected service calls was
conducted. Is there enough evidence to refute the telephone
company's claim that the number of service calls does not change
from day-to-day?
Days of the Week
Mon
Tue
Wed
Thu
Fri
Number of Calls
26
22
19
24
19
Copy Data
Step 1 of 10:
State the null and...

The number of hours10 students spent studying for a test and
their scores on that test are shown below. Is there enough
evidenceto conclude that there is a significant linear correlation
between the data. Use alpha=0.05
hours, x: 0 1 2 3 4 5 6 7 8 Test score, Y: 35 42 51 57 63 70 76
78 82 93 Setup the hypothesis for the test? identify the critical
value(s) calculate the test statistic? what is your conclusion?

Suppose a candy company representative claims that colored
candies are mixed such that each large production batch has
precisely the following proportions: 20%20% brown, 20%20% yellow,
10%10% red, 10%10% orange, 10%10% green, and 30%30% blue. The
colors present in a sample of 459459 candies was recorded. Is the
representative's claim about the expected proportions of each color
refuted by the data?
Color
brown
yellow
red
orange
green
blue
Number of Candies
44
67
67
78
44
159
Step 1 of...

Do students who take SAT coaching classes improve their test
scores? Seven students were selected randomly from all of the
students who completed an SAT coaching class in a given year. For
each student, the first SAT score (before the class) and the second
SAT score (after the coaching class) were recorded. The data is
summarized below:
Student 1 2 3 4 5 6 7 First SAT score 920 820 960 920 1060 860
1010 Second SAT score 1030 800...

Randomly selected students were given five seconds to estimate
the value of a product of numbers with the results shown below.
Estimates from students given
1×2×3×4×5×6×7×81×2×3×4×5×6×7×8:
200, 1500, 1000, 10000, 1560, 856, 200, 2040, 200, 45000
Estimates from students given
8×7×6×5×4×3×2×18×7×6×5×4×3×2×1:
550, 450, 500, 3500, 2000, 350, 400, 49000, 25000, 40320
Use a 0.050.05 significance level to test the claim that the two
populations have the same mean.
(a) The test statistic is

Past enrollment data indicates that 21% of the students taking
elementary statistics at FHSU come from families of size six or
larger. Is the enrollment in this semester's virtual class
significantly greater than this claim, as measured statistically?
Justify your answer through a formal hypothesis testing procedure
on proportions with a 10% level of significance. It is required
that you give needed hypotheses and related statistical values
below as well as statistical computations to the right (again feel
free to...

A highway department executive claims that the number of fatal
accidents which occur in her state does not vary from month to
month. The results of a study of 131 fatal accidents were recorded.
Is there enough evidence to reject the highway department
executive's claim about the distribution of fatal accidents between
each month?
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Fatal Accidents
8
7
13
18
13
7
10
14
8
7
18...

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