1) Which of the following values could NOT represent a correlation coefficient? p=0.008 &p=-1...

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1) Which of the following values could NOT represent a correlation coefficient? à p=0.008 下列数据哪一个不代表 &p=-1 c. p=1.02 p=0 2) Considering having a bivariate normal distribution. If the correlation coefficient of the two variables is equal to zero, which one is correct? .... a. The two variables have a non-linear relationship. We cannot conclude the two variables are independent of each other. c. We can conclude the two variables are independent of each other. d. We need more information to make any conclusions here. 3) Which of the following is an unbiased point estimate of the population variance? a. 0 b. X (C) 5² 4) In an attempt to increase business on Monday nights, a restaurant offers a free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday was 140. A random sample of Mondays while the offer was in effect is selected and numbers of diners are recorded. The owner wants to use this sample to find the probability that the mean number of customers on Monday nights has increased (hence, P(X> 140)). The following histogram and boxplot present the distribution of the population. Would the use of central limit theorem be appropriate in this situation? Frequency R a. 420 150 Nutreer of Laers Number of Diners Yes, central limit theorem can be used to find the probability since sample size is large enough. b. No, central limit theorem would not be appropr sample size is too small and considering the skewed distribution of the population. No, central limit theorem would not be appropriate since the population is not large enough. d. None of above. 1 1) Which of the following values could NOT represent a correlation coefficient? à p=0.008 下列数据哪一个不代表 &p=-1 c. p=1.02 p=0 2) Considering having a bivariate normal distribution. If the correlation coefficient of the two variables is equal to zero, which one is correct? .... a. The two variables have a non-linear relationship. We cannot conclude the two variables are independent of each other. c. We can conclude the two variables are independent of each other. d. We need more information to make any conclusions here. 3) Which of the following is an unbiased point estimate of the population variance? a. 0 b. X (C) 5² 4) In an attempt to increase business on Monday nights, a restaurant offers a free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday was 140. A random sample of Mondays while the offer was in effect is selected and numbers of diners are recorded. The owner wants to use this sample to find the probability that the mean number of customers on Monday nights has increased (hence, P(X> 140)). The following histogram and boxplot present the distribution of the population. Would the use of central limit theorem be appropriate in this situation? Frequency R a. 420 150 Nutreer of Laers Number of Diners Yes, central limit theorem can be used to find the probability since sample size is large enough. b. No, central limit theorem would not be appropr sample size is too small and considering the skewed distribution of the population. No, central limit theorem would not be appropriate since the population is not large enough. d. None of above. 1

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1 Correlation coefficient always lies between 0 to 1 So c is correct answer 2 When cor... View the full answer