Question

March 17 - April 1 | -0.17 |

March 18 - April 2 | -0.29 |

March 19 - April 4 | -0.29 |

March 20 - April 5 | -0.71 |

March 22 - April 6 | -0.58 |

March 24 - April 10 | -1.64 |

March 25 - April 12 | -1.88 |

March 27 - April 13 | -1.88 |

March 28 - April 15 | -2.5 |

March 30 - April 16 | -2.78 |

Mean = | -1.238 |

Standard Deviation = | 1.024 |

Do the following.

D) For each country test at 5% level if the mean for March is different from the mean for April using 10 paired samples

Answer #1

H0: There is no significance difference between the means of march month and april month

H1: There is significance difference between the means of march month and april month

Let the los be alpha = 5%

Critical t: ±2.2622 at 5% los and df = 10-1 = 9

P-Value: 0.0041

since t value is not in t critical values and P-value < alpha 0.05 so we reject H0

Thus we conclude that there is significance difference between the means of march month and april month

Data set for ages of students in stats class:
17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,19,
20, 20, 20, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23,
24, 25, 25, 25, 26, 26, 27, 28, 28, 28, 28, 29, 29, 32, 36, 42
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A study was conducted to see if students’ writing skills
continue to improve as the academic year progresses. English 101
students were asked to write essays throughout the year in
September, December, March and June. The scores were compared to
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a significant improvement?
The appropriate test for this problem is:
one-way ANOVA
repeated measurements
Student
September
December
March
June
1
17
23
21
24
2
25
21
21...

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____________________________________________
The results of a sample of 372 subscribers to Wired
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What is the probability that another sample of 372 subscribers
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____________________________________________
Develop a 95% confidence interval for the population mean
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10-12 5
13-15 9
16-18 12
19-21 4
22-24 10
The mean for that distribution is:
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- 18.22
- 17.38
- 16.15
The mode of this distribution is:
-23
-15
-17
-12

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Data from Mill 2: 13, 13, 13, 15, 18, 18, 18, 19, 19,
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7520
a) Calculate the mean and standard deviation for Mill
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b) Calculate the mean and standard deviation for Mill
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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
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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
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Cassie:
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I 8, 28, 12, 18, 22
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The computer-science aptitude score, x, and the
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x
5
15
21
12
23
22
14
19
18
17
19
18
7
5
6
21
19
10
18
13
y
19
19
24
36
27
26
25
28
17
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21
24
18
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21
22
20
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