The number of semester hours of college credit taken by first-time candidates for a certain professional exam has a Normal distribution with a mean of 120 hours and a standard deviation of 16 hours. Consider a random sample of n first-timecandidates for the exam and let x represent the mean number of hours of college credit taken for the sample. Complete parts a through e below.Click the icon to view the table of normal curve areas......a. Describe the shape of the sampling distribution of x.A. The shape is Normal distribution only when sample size is greater than 30B. The shape is Normal distribution for any sample sizeO C. is always the same as the distribution of the populationD. The shape is skewed rightb. If 16 first-time candidates for the exam are randomly selected, what is the probability that the mean number of hours of college credit taken by these students x is between 118 and 122 hours?P(118 < x <122) = (Round to four decimal places as needed.)c. If 64 first-time candidates for the exam are randomly selected, what is the probability that the mean number of hours of college credit taken by these students x is between 118 and 122 hours?P(118 < x <122) :d. Which of the following is the correct graph of the probabiity density functions of x , assuming red = sample size 16, green = sample size 64.(Round to four decimal places as needed.)%3DO A.0+108 112116120124128 132 0+108 112116120124 128 132OC.0+108 112116120 124 128 132B.

As per our guidelines, we are allowed to answer first three sub-parts only. Thanks Mean , μ = 120…

Answered: The number of semester hours of college…

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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Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence to conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u. 2 Ha represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H.. Ho: H - X Cost of batteries by type The claim the V hypothesis. Group size 35 Group size 65 Group size 24/ 24F 91 99 111 119 126 O 91 144 174 180 278 79 84 126 140 140 (b) Find the critical value, Fo. and identify the rejection region. The rejection region is F Fo, where Fo- (Round to two decimal places as needed.) (c) Find the test statistic F. F= (Round to two decimal places as…
Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…
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A population has a mean p= 75 and a standard deviation o= 6. Find the mean and standard deviation of a sampling distribution of sample means with sample size n= 36. (Simplify your answer.)
The annual salary for one particular occupation is normally distributed, with a mean of about $132,000 and a standard deviation of about $16,000. Random samples of 26 are drawn from this population, and the mean of each sample is determined. Find the mean and standard deviation of the sampling distribution of these sample means. Then, sketch a graph of the sampling distribution.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately nothing% of vehicles travel between 65 miles per hour and 71 miles per hour.
Find the weighted estimate, p to test the claim that p, = p2. Use a = 0.05. The sample statistics listed below are from independent samples. n, = 50, x, = 35, and = 60, x, = 40 O A. 0.682 O B. 0.238 C. 1.367 D. 0.328
Draw the normal curve using the data given b. x = 83. s = 6 a.x = 30. s = 8 %3D
Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations. The students in Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score. 600 626 347 356 608 349 357 624 470 482 O 491.7 O 472.5 O 476 O 481.9 A Moving to another question will save this response. K Qu PrtScnR Home F9 PgUp F3 F4 F5 F6 End F7 F10 F12 F11 %23 2$ & 4 7 9. E T Y U // LLI
Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations. The students in Hugh Logan's math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the mean score. 572 529 346 346 557 356 359 592 470 482

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