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GENERAL DIRECTIONS: This is a 35-item fest, read each direction carefully written in every type of test. NO ERASURES, any erasures consider invalid. 1. Multiple Choices. Encircle the letter of the correct answer. If the answer is not in the choices, write the correct answer at the side of the question/s. 1. It is represent a part of a whole. Similar to probability. It can be expressed as a percentage. decimal, or fraction. a. Proportion b. Percentage C. Estimate d. Point Estimate 2. Is a single used to approximate a population parameter. a. Proportion b. Percentage c. Estimate d. Point Estimate 3. also known as the student's t-distribution, is used when making references about the mean of a small sample when the standard deviation of the population is not known. a. Probability distribution b. Sampling distribution c. t-distribution d. probability . It is the interval defined within the true population where members of the sample are expected to be found. a. Confidence level b. Confidence interval c. Degrees of freedom d. Margin of error 5. It is expressed as percent, it sets a portion of the sample to be included within a known range of the true population. a. Confidence level b. Confidence interval c. Degrees of freedom d. Margin of error 6. A statistical method applied in making decisions using experimental data. a. Testing b. Hypothesis testing c. Hypothesis d. Parameters 7. It is proposed explanation, assertion or assumption about a population parameter or about the distribution of a random variable. a. Testing b. Hypothesis testing c. hypothesis d. parameters8. It is denoted by alpha refers to the degree of significance in which we accept or reject the null hypothesis. a. Null hypothesis b. Level of significance c. Alternative hypothesis d. Degree of freedom 9. The is contrary to the null hypothesis, which shows that observations are the result of a real effect. a. Null hypothesis b. Level of significance C. Alternative hypothesis d. Degree of freedom 10. It is a hypothesis that an initial claim based on previous analyses, which the researcher tries to reject. a. Null hypothesis b. Level of significance C. Alternative hypothesis d. Degree of freedom II. Find the required area under the t-distribution given the following conditions. 11. Area to the left of t = 2.92,df = 2 12. Area to the right of t = -1.796, df = 11 13. Area from t = -1.74 to t = 2.567, df = 17 Formulate the null hypothesis and alternative hypothesis. 1. The average power consumption of air conditioner is at most 2,700 watts as claimed by the owner. A survey made by an electric power company found out that the mean consumption is 3, 000 with standard deviation of 225