3.To determine whether chocolate or vanilla ice cream is more popular, the owner ofthe Zootie ice cream shop takes a random sample of vanilla and chocolate ice cream sales forseveral days. For the 14 days sampled, an average of 25 people bought vanilla and 30 peoplebought chocolate each day. The standard deviations were 1.9 and 2.3, respectively. Thedistribution of sales of both flavors is assumed to be normal, but the variances are unknown. Forboth a and b, use a significance level of 0.05.a)Determine whether there is statistical evidence that the variances in ice cream salesfor vanilla and chocolate are equal.b) Based on your answer in part a, conduct an appropriate hypothesis test to determine if vanillaand chocolate differ in average daily sales.

Answered: Image /qna-images/answer/797a771c-7b78-4eed-b372-7bf04bf538b8.jpg

Answered: 3. To determine whether chocolate or…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The length of songs in the Big Hair playlist of a Statistics professor's mp3 player varies from song to song. This variation can be modeled by the normal distribution, with a mean song length of �=4.3 minutes and a standard deviation of �=0.65 minutes. (Note that a song that has a length of 4.5 minutes is a song that lasts for 4 minutes and 30 seconds.)The professor decides to shuffle the playlist, which means that the mp3 player will randomly pick a song within this particular playlist and play it next.(a) What is the probability that the next song to be played is between 3.9 and 4.85 minutes long? Answer to four decimals. (b) What proportion of all the songs in this playlist are longer than 5 minutes? Use four decimals in your answer. (c) 20% of all the songs in this playlist are at most how long, in minutes? Enter your answer to two decimals. minutes(d) There are 247 songs in the Big Hair playlist. How many of these would you expect to be longer than 5 minutes in length? Use two…
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