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Author Question: What type of car is more popular among college students, American or foreign? One hundred fifty-nine ... (Read 142 times)

tiara099

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on: Feb 14, 2020

Question 1

A marketing research company is estimating which of two soft drinks college students prefer. A random sample of 341 college students produced the following 95% confidence interval for the proportion of college students who prefer one of the colas: What additional assumptions are necessary for the interval to be valid?
◦ The sample was randomly selected from an approximately normal population.
◦ No additional assumptions are necessary.
◦ The sample proportion equals the population proportion.
◦ The population proportion has an approximately normal distribution.

Question 2

What type of car is more popular among college students, American or foreign? One hundred fifty-nine college students were randomly sampled and each was asked which type of car he or she prefers. A computer package was used to generate the printout below for the proportion of college students who prefer American automobiles.

SAMPLE PROPORTION = .396226
SAMPLE SIZE = 159

UPPER LIMIT = .46418
LOWER LIMIT = .331125

Is the sample large enough for the interval to be valid?
◦ No, the population of college students is not normally distributed.
◦ Yes, since n and n are both greater than 15.
◦ No, the sample size should be at 10% of the population.
◦ Yes, since n > 30.
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by tiara099 on Feb 14, 2020

scottmt

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Reply #1 on: Feb 14, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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tiara099

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Reply 2 on: Feb 14, 2020
:D TYSM

mohan

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Reply 3 on: Yesterday
Excellent

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