1.) The question is followed by two statements labeled 1 and 2 where certain data are given. You don't really have to compute for an answer; but rather you have to decide whether the given data in the statements are sufficient for answering the question: The owner of a chain of fruit shake would like to study the correlation between atmospheric pressure and sales during the summer season. A random sample of 12 days is selected. Does it appear there is a significant relationship between atmospheric pressure and sales?1. There is no significant correlation between atmospheric pressure and total sales of fruit shake. 2. The coefficient of correlation, r = 0.93 and the critical value r = 0.576.

a.) Statement 1 alone is sufficient, but statement number 2 alone is NOT sufficient to answer the question asked.

b.) Statement 2 alone is sufficient, but statement 1 alone is NOT sufficient to answer the question asked.

c.) Statements 1 and 2 together are sufficient to answer the question but neither alone is sufficient

d.) Each statement is sufficient by itself to answer the question asked.

e.) Statements 1 and 2 together are NOT sufficient to answer the question asked and additional data specific to the problem is needed.

2.) Which of the following statements describes the sampling distribution of the sample means? I. The mean is equal to the population mean. II. The standard deviation is equal to the standard deviation of the sample divided by the standard deviation of the population. III. The sampling distribution will tend to have a normal distribution regardless of the shape of the population.

a.) I and II

b.) I and III

c.) II and III

d.) I, II, and III

3.) If one-tailed test for a proportion is being performed and the upper critical value is +2.33 and the test statistic or computed value is equal to+1.37, then _____

a.) the null hypothesis should not be rejected

b.) the alternative hypothesis should not be rejected

c.) the null hypothesis should be rejected

d.) the sample size should be decreased

4.) Compare the following statements: I. The form of the null hypothesis varies depending on the test being conducted. II. The confidence level determines the sample size to be used in the study.

a.) Both statements are correct.

b.) Both statements are incorrect.

c.) Only the first statement is correct.

d.) Only the second statement is correct.

5.) f the level of significance of a hypothesis increased from 0.01 to 0.05, the probability of committing a type II error _____.

a.) also increases from 0.01 to 0.05

b.) decreases

c.) increases then decreases

d.) will not change

6.) The question is followed by two statements labeled 1 and 2 where certain data are given. You don't really have to compute for an answer; but rather you have to decide whether the given data in the statements are sufficient for answering the question: Is there a significant evidence that the alcohol had an effect on birth weight at a significance level of 0.05? 1. The degrees of freedom is 12.2. The average monthly consumption of alcohol by pregnant women is 25 liters

a.) Statement 1 alone is sufficient, but statement number 2 alone is NOT sufficient to answer the question asked.

b.) Statement 2 alone is sufficient, but statement 1 alone is NOT sufficient to answer the question asked.

c.) Statements 1 and 2 together are sufficient to answer the question but neither alone is sufficient

d.) Each statement is sufficient by itself to answer the question asked.

e.) Statements 1 and 2 together are NOT sufficient to answer the question asked and additional data specific to the problem is needed.

7.) A weather forecaster stated that the average temperature during January in Cebu is less than 28 degrees Celsius. A sample of 35 days in January was taken. What is the correct set of hypotheses?

a.) Ho: 28C; H1: < 28C

b.) Ho: 28C; H1: > 28C

c.) Ho: 28C; H1: = 28C

d.) Ho: < 28C; H1: > 28C

8.) A local gym charges Php300 of monthly membership fee plus Php50 per hour for aerobics class. What is the linear regression equation that describes the relationship between the total monthly cost and the number of class hours per month?

a.) y = 50x + 300

b.) y = 300x + 50

c.) y = 250x + 50

d.) y = 350x + 50

9.) When n is smaller than 30, then the t-distribution _____.

a.) is taller and narrower than the normal distribution

b.) is identical in shape

c.) is flatter and more spread out than the normal z-distribution

d.) cannot be specified, making hypothesis tests impossible

10.) Suppose data are normally distributed with a mean of 120 and a standard deviation of 30. Between what two values will approximately 68% of the data fall?

a.) 30 and 210

b.) 60 and 180

c.) 90 and 150

d.) 105 and 135