Many students face the problems when they start studying the Statistics and Probability subject. Trying to understand a lot of different aspects they feel stressed and that doesn’t have a beneficial effect on their health. Students have a great deal of statistics and probability questions that they puzzle over every day. Our service will provide every client with the statistics and probability answers. We promise to do our best to help you solve your statistics and probability problems, just let us know your problem and you will get the best statistics and probability answers ever!
Ask Your question
Need a fast expert's response?Submit order
and get a quick answer at the best price
for any assignment or question with DETAILED EXPLANATIONS!
Search & Filtering
75 86 84 85 97
94 84 83 83 89
88 77 76 76 82
72 105 94 94 83
81 97 93 93 79
a) Determine the range of the measurements.
b) Dividing the range by 7, the number of subintervals selected, and rounding, we have a class interval width of 5. Using 70.5 as the lower limit of the first interval, construct a frequency histogram and cumulative frequency curve.
c) Find the mean, median and standard deviation for the data set.
From the histogram constructed and also the measures of central tenency calculated, what can you conclude about the distribution of the data?
A group of second year Forestry students conducted an experiment to compare the germination time (in days) for pine seeds sown in a green house with those sown outside the green house. Ten (10) seeds of pine were sown in the green house and ten (10) other seeds of pine were sown outside the green house. The number of days it took each seed to germinate was recorded and the following were the results.
Greenhouse 41 35 33 36 40 46 31 37 34 30
Outside 52 57 62 55 64 57 56 55 60 59
Calculate the mean, variance and standard error of the mean for each data set.
Test for equality of variances for the two data sets. Use α=0.10.
Do the data provide sufficient evidence to indicate that the mean germination time for seeds sown in the greenhouse was less than for seeds sown outside? Use α=0.05.
State three assumptions which are common for both tests conducted in b) and c).
1. 3 or more defective
2. 4 or less defective
It is claimed that the average weight of a bag of biscuits is 250 grams with a standard deviation 20.5 grams. Would you agree to this claim if random sample of 50 bags of biscuits showed a average weight of 240 grams, using a 0.05 evel of significance?