Question (A)
If one wants to test whether there is difference in mean scores before and after an test, they should use two sample independent t-test since the scores before and after the test are independent
So Asnwer is Option D
Question (B)
The probability density function of uniform disitrbution is f(x) = 1 / (b - a)
So shape of the density function will be straight horizontal line between a and b
Answer is Option B
Multiple Choice Questions Choose the one alternative that best completes the statement or answers the question...
If one wants to test whether there is a difference in mean scores before and after an exam, which will be an appropriate test to use? a) one sample z test b) one sample t test c) paired t test d) two sample independent t test If X is a random variable following a Uniform(a,b) distribution, which option represents an approxi- mate shape of its density function? a) straight vertical line between a and b b) straight horizontal line between...
2. If X is a random variable following a Uniform(a,b) distribution, which option represents an approxi- mate shape of its density function? a) straight vertical line between a and b b) straight horizontal line between a and b c) symmetric U shaped curve between a and b d) symmetric inverse U shaped curve between a and b
If X is a random variable following a Uniform(a,b) distribution, which option represents an approxi- mate shape of its density function? a) straight vertical line between a and b b) straight horizontal line between a and b c) symmetric U shaped curve between a and b d) symmetric inverse U shaped curve between a and b
Section MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question. Using the following uniform density curve, answer questions 1 and 2 T Pd 125 1) What is the probability that the random variable has a value greater than 32 A) 0.575 1) g0625 B) 0500 D) 0.750 2) What is the probability that the random variable has a value between 0.1 and 0.8? A) 0.213 2) B) 0.088 90338 D) 0.038 Find the indicated...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 5) Monopoly is a market structure in which: A) one firm makes up the entire market. B) many firms produce differentiated products. C) many firms produce identical products. D) a few firms dominate the market. 6) A market structure in which one firm makes up the entire market is: A) perfect competition. B) an oligopoly. C) monopolistic competition. D) a monopoly. 7) The demand curve...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 9) The home care nurse reviews the following medication order for a client: Take 2 t ampicillin oral suspension every 6 hours. How many T of the medication will the client take in 1 day? 9) A) 3 1/3 B) 2 1/3 C) 2 D) 2 2/3
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Determine whether the alternative hypothesis is left-tailed, right-tailed, or two-tailed. H: H=78 H: A < 78 A) two-tailed B) left-tailed C) right-tailed
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 15) 15) A local bank needs information concerning the checking account balances of its customers. A random sample of 15 accounts was checked. The mean balance was $686.75 with a standard deviation of $256.20. Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed. A) ($238.23, $326.41) B) ($487 31, $563.80) © ($513.17, $860.33) D) ($326.21, $437.90)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 21) 21) "Demand-pull inflation" refers to A) any inflation that is originally caused by a rightward shift of the AD curve but is maintained at a constant level by monetary validation. B) only the inflation that results from an expansionary monetary policy. C) any inflation that is originally caused by a rightward shift of the AD curve but is accelerating due to monetary validation. D)...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question 24) Find the critical value. 24) Source DF SS MS F P treatments 3 13.500 4.500 5.17 0.011 16 13.925 0.870 19 27.425 Total C) 3.06 A) 8.70 B) 3.24 D) 5.42 25) What can you conclude about the equality of the population means? Use level of significance of 25) 0.05 SourceDF SS MS F treatments 3 13.500 4.500 5.17 0011 16 13.925 0.870 Total...