At an assembly plant for light trucks, routine monitoring of the quality of welds yields thefollowing data:The results are presented in the following table.Observed ValuesNumber of WeldsHigh QualityModerateLow QualityQualityDay ShiftEvening ShiftNight Shift467191424451713425412917a) State the appropriate null hypothesis?b) Compute the table of expected values under the null hypothesis.c) Compute the value of the Chi-square statistics.d) Find the P-value. What doyou conclude?

The chi-square test of independence is used to test whether there is any significant relationship…

Answered: At an assembly plant for light trucks,…

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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A magazine claims that the mean amount spent by a customer at Burger Stop is greater than the mean amount spent by a customer at Fry World. The results for samples of customer transactions for the two fast food restaurants are shown below. At a= 0.10, can you support the magazine's claim? Assume the population variances are equal. Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e) below. Burger Stop X, = $9.13 Fry World X2 = $8.50 5, = $0.78 52= $0.68 n= 17 n2 =8 (a) Identify the claim and state Ho and H. Which is the correct claim below? O A. "The mean amount spent by a customer at Fry World is greater than the mean amount spent by a customer at Burger Stop." B. "The mean amount spent by a customer at Burger Stop is greater than the mean amount spent by a customer at Fry World." Oc. "The mean amount spent by a customer at Burger Stop is not equal to the mean amount spent by a customer at Fry World." O D. "The…
a) which for these data is 32.1470, 42.3520, or 10.0674 c) that minimizes the error sum of squares, total sum of squares, or regression sum of squares…for which these data is 32.1470, 42.3520, or 10.0674
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Some frozen food dinners were randomly selected from this week's production and destroyed in order to measure their actual calorie content. The claimed calorie content is 200. Here are the calorie counts for each frozen dinner selected: 191 189 198 210 207 203 209 215 209 204 200 194 Assume the distribution of calories is normal. (a) The test statistic (z/t) is Use two decimals. (b) Does the sample indicate that the mean calorie content is 200? Set a = (c) Find the P-value of the test in (a)-(b). 0.07 ? Yes No
A) find the critical value(s) round to 3 decimal places B) find the standard test statistic . Round to 3 decimal places
5. Given the diameter of 100 rods produced by particular machine: Diameter (cm) | No. of rods 0.48 – 0.53 17 0.54 0.59 25 0.60 – 0.65 0.66- 0.71 37 46 0.72 0.77 23 From data above: (a) Calculate mean. (b) Compute median. (c) Calculate mode. (d) Calculate Pearson's coefficient of skewness an interpret your finding.

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