Search & Filtering
Adam is building a doorway and wants the height of the door to be three standard deviations above the mean Canadian height. How high must the door be if the mean is 210 cm with a standard deviation of 10 cm?
A population consists of the five measurements
2 , 6 , 8 , 0 , and 1 . How many different samples
of size n = 2 can be drawn from the population.
Construct a table for the possible samples and
sample mean.
If the population consists of numbers 1, 2, 3, 4, 5, 6 and 7, find the mean of the samples of size 2 without replacement. Construct a sampling distribution.
tourists enter a popular game reserve at an average rate of one every five minutes. what is the probability that it takes more than twenty minutes until the first tourist arrives?
Perpetrators of a crime who have been given the maximum sentence of 10 years are believed by a fiscal to have been sentenced to no more than 7 years on average. A random sample of 20 of these crime offenders reveals a mean sentence of 7.6 years with a standard deviation of 2.4 years. Is the fiscal correct in his suspicions at 0.05 level of significance?
. A nutritionist is promoting a diet plan for shedding up to 5kg weights within a month without any involvement in comprehensive daily exercises. Some overweight persons had lost 4.1, 2.7, 6.6, 9, 3.8, 6.0, 4.2, 2.0, 3.0, 3.2, 6.3, 2.4, 4.4, 6.2 and 4.5 kgs in a month after following the diet plan. At 5% level of significance, determine whether the efficacy of the diet plan is currently being overrated
Consider a population of Senior High School consisting of the values 1, 2, 3,4, 5, and 6.
Compute the following:
1. population mean
2. population variance
3. population standard deviation
4. illustrate the probability histogram of the sampling distribution of the means
Find the area to the left of critical value = 2.500 when the sample size is 29. [Hint: One-tailed test]
What are the critical values of for area in two tails when the sample size is 29 with confidence level of 98%?
The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tests positive, given that he or she did not have the disease.
