I need help with questions 14 to 22 The statement P (comfortable intersection ha

Question

I need help with questions 14 to 22 The statement P (comfortable intersection happy at work) reads as the probability of a. Being comfortable or happy at work b. Being comfortable if happy at work c. Being comfortable and happy at work d. Being happy at work if you're comfortable A Z score of 0 means that the value a. Is to the right of the mean. b. Is far from the mean c. is close to the mean d. Is equal to the mean Knowing that standard error is calculated using the formula SE = SD/Squareroot n, increasing the sample size should a. Increase standard error b. Decrease standard error c. Change (positive or negative) the standard error d. Not affect the standard error Probabilities are always a. Positive b. Negative c. Annoying d. None of the above A researcher is interested in studying how caffeine intake affects test performance, and states his research hypothesis H_1: Consuming caffeine will improve test scores What kind of hypothesis test would the researcher use? a. One-tailed hypothesis test. (Right) b. One-tailed hypothesis test. (Left) c. Two-tailed hypothesis test. d. There's not enough information. In a normal distribution _____% of all data is within 1 SD from the mean a. 68% b. 95% c. 99.7% d. 100% In a sample distribution, the mean of the sample is equal to the population mean. a. True b. False When two probabilities add up to 1, they are called a. Complimentary b. Supplementary c. Elementary d. Complementary According to the Central Limit Theorem, as sample size increases, the sampling distribution becomes _____ in shape. a. Normal b. Skewed c. Flat d. Bimodal

Explanation / Answer

14)

P( confortable happy at work ) reads that probabity of being confortable and happy at work (B)

15)

z score of mean is (mean-mean)/standard deviation = 0

so A z score of 0 means that the value is equal to to the mean

16)

SE = SD/n

SE is inversely proportional to n as n is in denominator

so increasing sample size should decrease standard error

17)

values of porbabilties can be [0,1]

so it can be either 0 or positive

so answer is NOne of the these

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