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8th-ed Chapter 06, Section 6.1, Problem 016b Find the area under the standard normal curve between z = -2.50 and z = 0. Round your answer to four decimal places. A the tolerance is +/-2%Chapter 06, Section 6.4, Problem 041 The management of a supermarket wants to adopt a new promotional policy of giving a free gift to everyr customer who spends more than a certain amount per visit at this supermarket. The expectation of the management Is that after this promotional policv is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $16. If the management wants to give free gifts to at most 12.1% of the customers, what should the amount be above which a customer would receive a free gift? Round your answer to two decimal places. A customer should spend at least 3 to receive a free gift. Chapter 0'}, Section 7.2, Problem 014 The living spaces of all homes In a city have a mean of 2200 square feet and a standard deviation of 360' square feet. Let E be the mean living space for a random sample of 30 homes selected from this city. Flnd the mean of the sampling distribution of I. Enter an exact answer. mean of E = square feet Flnd the standard deviation of the sampling distribution of I. Round your answer to one decimal place. standard deviation of f = square feet Chapter 07, Section 7.3, Problem 024 The amounts of electricity bills for all households In a particular city have an approximately normal distribution with a mean of $105 and a standard deviation of 327. Let I be the mean amount of electricity bills for a random sample of 23 households selected from this city. Find the mean and standard deviation of E. Round your answers to the neart integer, if required. ra=$ 63:3 Comment on the shape of the sampling distribution of I. The sampling distribution of} " skewed to the left approximately normal skewed to the right Click If you would like to ' on: Qpen Show Work