Question

You are conducting an experiment on the effectiveness of a reading intervention with young children and want to report the descriptive results to your colleagues. Some of the children received the intervention, and some did not. What do the average, and standard deviations tell you about the results? This has to be done in Excel.

No Intervention | Intervention |

18 | 17 |

16 | 15 |

17 | 21 |

15 | 24 |

16 | 12 |

14 | 16 |

22 | 14 |

21 | 25 |

7 | 19 |

24 | 24 |

23 | 21 |

19 | 25 |

12 | 9 |

20 | 9 |

23 | 13 |

Answer #1

Assuming that the population standard deviation is
unknown, calculate the 95% confidence interval of the
population mean.
The following is the data. Calculating Process should be shown
by Excel (Formulas). What formulas in statistics are used?
7
21
23
24
18
16
2
19
11
6
3
13
17
9
5
12
13
17
4
14
15
25
12
24
22
14
14
20
15
11
26
17
21
11
4
13
16
14
13
14
25
23
9
15...

6. Using the class data (see Blackboard file - "Class Survey
Data - PSS-10 and GAS") calculate the correlation between the GAS –
Goal disengagement and the GAS – Goal reengagement scores. Write
the results in a statistical statement.
7. Using the class data calculate the correlation between the
GAS – Goal disengagement and the PSS-10 scores. Write the results
in a statistical statement.
8. Using the class data calculate the correlation between the
GAS – Goal reengagement scores and...

Part A. In the past it has been found that the arrival time have
a population mean value of μ = 13 and a population standard
deviation of σ = 6.26. Using the given data, test whether this mean
has changed. Use the critical value approach to test the
hypothesis. The significance level alpha is set at 0.05 . The
original data of time taken is given below. Show the process by
using excel (Formulas).
Part B. Test the hypothesis...

Administrators want to know the effectiveness of the Orange
Grove Elementary reading program. The average reading comprehension
score is 22 for children of comparative age. The data below are
reading comprehension scores from a sample of children from Orange
Grove Elementary. Scores range from 0 - 40 with higher scores
indicating better reading comprehension. What can be concluded with
α = 0.05?
id
reading
35
36
37
38
39
40
41
42
43
44
45
10
11
12
13
14...

Please use excel:
To assess the effectiveness of a cola video ad, a random sample
of 38 individuals from a target audience was selected to
participate in a copy test. Participants viewed two ads, one of
which was the ad being tested. Participants then answered a series
of questions about how much they liked the ads. An adindex measure
was created and stored in Adindex; the higher the adindex value,
the more likeable the ad. Compute descriptive statistics and
perform...

Consider the following data:
25
24
18
20
21
18
16
20
23
17
15
13
19
23
24
20
16
26
21
24
15
22
16
12
20
23
19
26
20
25
21
19
21
25
23
26
21
19
20
14
(a)
Develop a frequency distribution
using classes of 12-14, 15-17, 18-20, 21-23, and 24-26.
Class
Frequency
12-14
15-17
18-20
21-23
24-26
Total
(b)
Develop a relative frequency
distribution and a percent frequency distribution using the classes...

The results of a sample of 372 subscribers
toWiredmagazine shows the time spent using the Internet
during the week. Previous surveys have revealed that the population
standard deviation is 10.95 hours. The sample data can be found in
the Excel test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
Develop a 95% confidence interval for the population mean
If the editors of Wiredwanted to have the...

. Studies are often done by pharmaceutical companies to
determine the effectiveness of a treatment program. Suppose that a
new AIDS antibody drug is currently under study. It is given to
patients once the AIDS symptoms have revealed themselves. Of
interest is the average length of time in months patients live once
starting the treatment. Two researchers each follow a different set
of 40 AIDS patients from the start of treatment until their deaths.
The following data (in months) are...

Studies are often done by pharmaceutical companies to determine
the effectiveness of a treatment program. Suppose that a new AIDS
antibody drug is currently under study. It is given to patients
once the AIDS symptoms have revealed themselves. Of interest is the
average length of time in months patients live once starting the
treatment. Two researchers each follow a different set of 40 AIDS
patients from the start of treatment until their deaths. The
following data (in months) are collected....

____________________________________________
The results of a sample of 372 subscribers to Wired
magazine shows the time spent using the Internet during the week.
Previous surveys have revealed that the population standard
deviation is 10.95 hours. The sample data can be found in the Excel
test data file.
What is the probability that another sample of 372 subscribers
spends less than 19.00 hours per week using the Internet?
____________________________________________
Develop a 95% confidence interval for the population mean
____________________________________________
If the editors...

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