A consulting firm wants to study communication deficiencies in the health care industry. A random sample of 66 healthcare clinicians reveals the following:Time wasted in a day due to outdated communication technologies: X = 36 minutes, S = 9 minutes. Twenty-ninehealth care clinicians cite inefficiency of pagers as the reason for the wasted time.Complete parts (a) and (b) below.a. Construct a 90% confidence interval estimate for the population mean time wasted in a day due to outdatedcommunication technologies.sus Π(Round to two decimal places as needed.)b. Construct a 99% confidence interval estimate for the population proportion of health care clinicians who citeinefficiency of pagers as the reason for the wasted time.Σπς(Round to four decimal places as needed.) The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.65 inches and a standarddeviation of 0.06 inch. A random sample of 12 tennis balls is selected. Complete parts (a) through (d) below.a. What is the sampling distribution of the mean?O A. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will also be approximately normal.B. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will not be approximately normal.C. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will be the uniform distribution.D. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 cannot be found.b. What is the probability that the sample mean is less than 2.64 inches?P(X

Question

A consulting firm wants to study communication deficiencies in the health care industry. A random sample of 66 healthcare clinicians reveals the following:Time wasted in a day due to outdated communication technologies: X = 36 minutes, S = 9 minutes. Twenty-ninehealth care clinicians cite inefficiency of pagers as the reason for the wasted time.Complete parts (a) and (b) below.a. Construct a 90% confidence interval estimate for the population mean time wasted in a day due to outdatedcommunication technologies.sus Π(Round to two decimal places as needed.)b. Construct a 99% confidence interval estimate for the population proportion of health care clinicians who citeinefficiency of pagers as the reason for the wasted time.Σπς(Round to four decimal places as needed.) The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.65 inches and a standarddeviation of 0.06 inch. A random sample of 12 tennis balls is selected. Complete parts (a) through (d) below.a. What is the sampling distribution of the mean?O A. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will also be approximately normal.B. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will not be approximately normal.C. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 will be the uniform distribution.D. Because the population diameter of tennis balls is approximately normally distributed, the sampling distributionof samples of size 12 cannot be found.b. What is the probability that the sample mean is less than 2.64 inches?P(X<2.64)=(Round to four decimal places as needed.)c. What is the probability that the sample mean is between 2.63 and 2.67 inches?P(2.63 < X<2.67) =(Round to four decimal places as needed.)

Accepted Answer

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