Mathematics, 20.05.2020 12:58 Brucechavez3334
Sunspots have been observed for many centuries. Records of sunspots from ancient Persian and Chinese astronomers go back thousands of years. Some archaeologists think sunspot activity may somehow be related to prolonged periods of drought in the southwestern United States. Let x be a random variable representing the average number of sunspots observed in a 4-week period. In a random sample of 40 such periods from Spanish colonial times, the sample mean is x¯ = 47.0. Previous studies of sunspot activity during this period indicate that σ = 35. It is thought that for thousands of years, the mean number of sunspots per 4-week period was about µ = 41. Sunspot activity above this level may (or may not) be linked to gradual climate change. Do the data indicate that the mean sunspot activity during the Spanish colonial period was higher than 41? Use α = 0.05. (a) State the appropriate null and alternate hypothesis. (b) Compute the value of test statistic. (c) Using P-value method, state a conclusion.
Answers: 3
Mathematics, 21.06.2019 20:20, deonnaturner68p7hz7y
The surface area of the triangular prism is .
Answers: 1
Mathematics, 22.06.2019 04:30, mxrvin1350
What is the measure of angle lkj ? round to the nearest whole degree
Answers: 1
Sunspots have been observed for many centuries. Records of sunspots from ancient Persian and Chinese...
Business, 20.09.2020 08:01
Mathematics, 20.09.2020 08:01
History, 20.09.2020 08:01