Hi, I am struggling with the below questions, hopefully, it won't be much trouble to solve your help will be greatly appreciated and I'll be sure to leave a thumbs up :)
References:
Appendix Table: https://www.webassign.net/aswsbe13/appendix-b.pdf
Distribution Table: https://www.webassign.net/tparise/beta/stats/distributionIndex.html
1)
Automobile repair costs continue to rise With the average cost now at $367 per repaint Assume that the cost for an automobile repair is normally distributed with a standard deviation of $83. Answer the following questions about the cost of automobile repairs. (a) What is the probability that the cost will be more than $430? (Round your answer to four decimal places.) |:| (b) What Is the probability that the cost will be less than $280? (Round your answer to four decimal places.) E (c) What is the probability that the cost will be between $230 and $430? (Round your answer to four decimal places.) |:| (d) If the cost for your car repair is in the lower 5% of automobile repair charges, what is your maximum possible cost in dollars? (Round your answer to the nearest cent.) $|:| Alexa is the popular virtual assistant developed by Amazon. Alexa interacts with users using articial intelligence and voice recognition. It can be used to perform dailyr tasks such as making todo lists, reporting the news and weather, and interacting with other smart devices in the home. In 2018, the Amazon Alexa app was downloaded some 2,800 times per day from the Google Play store.+ Assume that the number of downloads per day of the Amazon Alexa app is normally distributed with a mean of 2,800 and standard deviation of 860. (a) What is the probability there are 1,900 or fewer downloads of Amazon Alexa in a day? (Round your answer to four decimal places.) |:| (b) What is the probability there are between 1,600 and 2,600 downloads of Amazon Alexa in a day? (Round your answer to four decimal places.) E (c) What is the probability there are more than 2,900 downloads of Amazon Alexa in a day? (Round your answer to four decimal places.) |:| (d) Suppose that Google has designed its servers so there is probability 0.02 that the number of Amazon Alexa app downloads in a day exceeds the servers' capacity and more servers have to be brought online. How many Amazon Alexa app downloads per day are Google's servers designed to handle? [Round your answer to the nearest integer.) \\:| downloads per day A group conducted a survey of 13,000 brides and grooms married in the United States and found that the average cost of a wedding is $22,853. Assume that the cost of a wedding is normally distributed with a mean of $22,858 and a standard deviation of $5,600. (a) What is the probability that a wedding costs less than $20,000? (Round your answer to four decimal places.) E (b) What is the probability that a wedding costs between $20,000 and $31,000? [Round your answer to four decimal places.) E (c) What is the minimum cost [in dollars) for a wedding to be included among the most expensive 5% of weddings? (Round your answer to the nearest dollar.) 1*: Suppose that the mean daily viewing time of television is 8.35 hours. Use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household (a) What lS the probability that a household views television between 5 and 11 hours a day? (Round your answer to four decimal places.) E (b) How many hours of television viewing must a household have in order to be in the top 4% of all television viewmg households? (Round your answer to two decimal places.) (c) What lS the probability that a household views television more than 4 hours a day? (Round your answer to four decimal places.) E
