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A two-tailed test is performed at a 5% level of significance. The p-value is determined to be 0.09. The null hypothesis
Read the z statistic from normal distribution table and circle the correct answer. A one-tailed test (lower tail) at a .063 level of significance; z =
To compare the users of the Twitter to those of Facebook, the sociologist asked another 10 students to point out the number of times they log in to their Facebook account each and every month. The a
Investor ABC has two stocks: A and B. Each stock might raise in value, decrease in value, or remain unchanged. Suggest the experiment of investing in the two stocks and observing the change (if any)
A survey of 254 landscaping companies showed that 155 of them advertised in newspaper A, 152 advertised in newspaper B, and 110 advertised in both. Determine the probability that a landscaping compa
Thirty percent of workers in company XYZ take public transportation daily to go to work. In a sample of ten workers, what is the probability that
Customers arrive at the specific ATM at the rate of 30 customers per hour. Determine the probability of three customers arriving in a five minute-time interval?
Mozart music is administered to each individual in the sample for 20 minutes. After which each individual is given the spatial task. The average score for treated sample is M = 86 with SS = 288. Al
A process is in control with the normally distributed output distribution with mean 1,000 and standard deviation 100. The upper and lower specification limits for the process are 1,020 and 980, res
Throughout the regular season of the NBA, the great Larry Bird made 3,960 free throws out of 4,471 attempts for a career free throw percentage of 88.6%. As of March 21/11, British Columbia's own Ste
Ask your classmates for their individual grooming time per day (unless you're an 8:00am class), and use the data to estimate the true mean grooming time for your school with 95% confidence.
A soda compay desires to stimulate sales in this economic climate by giving customers a chance to win a small prize for every bottle of soda they buy.
There're 7 seniors and 3 juniors in the statistics club, and team of 5 will be radomly chosen to attend the Joint Statistical Meetings in San Diego.
A trucking firm suspects that variance for a certain tire is greater than 1,000,000. To check the claim, the firm puts 101 of these tires on its trucks and gets a standard devation of 1200 miles. If
Describe the appropriate null and alternative hypotheses for testing whether the proportion of male students who admit to cheating is higher than that of female students.
The Empirical Rule states that for a bell-shaped distribution, approximately 95 percent of data should lie within
It is said that sufferers of the cold virus experience symptoms for 7 days. But, the amount of time is actually normally distributed random variable whose mean is 7.5 days as well as whose standard
If two variables show the positive linear relationship in a scatter diagram:
A standard deck of playing cards has the total of 52 cards. 4 out of these cards are kings, 4 cards are queens, 4 cards are jacks and 4 cards are aces. Determine the chances of drawing a single jack
Is it true that There is no hard-and-fast rule regarding the number of classes that must be used when establishing a frequency distribution for a continuous variable.
Compute degress of freedom and identify the critical t value in each of the following circumstances:
They say the claim is based on a study of 300 people. Which of the following statistical methods was most likely used to arrive at the company's conclusion?
A researcher believes that accidents on built-up roads should occur on any day of the week with equal frequency. At the ????0.05 level, what is the researcher's conclusion?
In spite of what may seem obvious, medical research has shown that being cold isn't related to catching a cold. Suppose that in one such study, 40 subjects were exposed to cold viruses.
Compute the probability that the final selection of 2 or fewer subset members were all One A Day multiple vitamin users. Compute the probability that the final selection of more than 1 subset members