A random sample of 210 parents were asked how muchthey spent on their child's last birthday gift. This sampleresulted in a mean of $50 and a standard deviation of$5. Construct a 95% confidence interval for the meanamount of money parents spend on their child's birthdaygift.Note on rounding:For part (A) enter only a lowercase "t" or a lowercase "z"for the first available blank answer. Round the criticalvalue to three decimal places as needed.For part (B) round all numerical answers to two decimalplaces exactly. Do not enter $ in your answers.A. The criticalB. With a 95% confidence, the mean amount of moneyparents spend on their child's birthday gift isbetween $and $Assume you know the population standard deviation, o0%SENED A random sample of 210 parents were asked how muchthey spent on their child's last birthday gift. This sampleresulted in a mean of $50 and a standard deviation of$5. Construct a 95% confidence interval for the meanamount of money parents spend on their child's birthdaygift.Note on rounding:For part (A) enter only a lowercase "t" or a lowercase "z"for the first available blank answer. Round the criticalvalue to three decimal places as needed.For part (B) round all numerical answers to two decimalplaces exactly. Do not enter $ in your answers.A. The criticalB. With a 95% confidence, the mean amount of moneyparents spend on their child's birthday gift isbetween $and $Assume you know the population standard deviation, o0%SENED

Answered: B. With a 95% confidence, the mean…

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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Español A decade-old study found that the proportion, p, of high school seniors who believed that "getting rich" was an important personal goal was 80%. A researcher decides to test whether or not that percentage still stands. He finds that, among the 240 high school seniors in his random sample, 185 believe that "getting rich" is an important goal. Can he conclude, at the 0.10 level of significance, that the proportion has indeed changed? Perform a two-tailed test. Then complete the parts below. SEE Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) 00 (a) State the null hypothesis H, and the alternative hypothesis H,. H, :0 H :0 (b) Determine the type of test statistic to use. O=0 OSO O20 (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) O

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B. With a 95% confidence, the mean amount of money parents spend on their child's birthday gift is between $ and $