Describe the population of interesthow many of the students

Assignment Help Basic Statistics

Reference no: EM13620620

Some students that attend college students work full or part time. How much did your working college friends each earn last month? Listed below is the amount earned last month by each student in a sample of 35 college students.

0	0	105	0	313	453	769
415	244	0	333	0	0	362
276	158	409	0	0	534	449
281	37	338	240	0	0	0
142	0	519	356	280	161	0

a.) Describe the population of interest.

b.) How many of the students in the sample worked last month?

c.) Describe the variable, amount earned by a working college student last month, using one graph, one measure of central tendency, and one measure of dispersion.

d.) Find evidence to show that the assumptions used for the Student%u2019s t-distribution have been satisfied.

e.) Estimate the mean amount earned by a college student per month using a point estimate and a 95% confidence interval.

f.) Based on records from the US Department of Education it is estimated that college students earn an average of $350. Does the sample show sufficient reason to reject the claim? Use %u03B1 = 0.05

2. A researcher collects data on two independent samples. The first group consists of 20 human subjects, has a sample mean of 4.21, and a standard deviation of 1.4. The second group consists of 20 subjects, has a sample mean of 3.15, and a standard deviation of 1.8. Test the null hypothesis that there is no difference between the population means of the two groups at the .01 level of significance. Indicate a) the observed value of the test statistic, b) the critical value(s), c) whether you reject or fail to reject the null hypothesis.

3. A researcher collects data on two independent samples. The first group consists of 20 human subjects, has a sample mean of 4, and a variance of 5. The second group consists of 10 subjects, has a sample mean of 6, and a variance of 9. Test the null hypothesis that there is no difference between the population means of the two groups at the .10 level of significance. Indicate a) the observed value of the test statistic, b) the critical value(s), c) whether you reject or fail to reject the null hypothesis.

Reference no: EM13620620

Questions Cloud

One recent study has shown that x rays with a wavelength of : one recent study has shown that x rays with a wavelength of 0.0050 can produce significant numbers of mutations in

Morton mercado the cfo of kanton company carefully : morton mercado the cfo of kanton company carefully developed the estimates of the firms total funds requirements for

Your finance text book sold 54000 copies in its first year : your finance text book sold 54000 copies in its first year. the publishing company expects the sales to grow at a

The two most prominent wavelengths in the light emitted by : the two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 rm nm red and 486 rm nm

Describe the population of interesthow many of the students : some students that attend college students work full or part time. how much did your working college friends each earn

What is the potential difference measured across the plates : the capacitor is disconnected from the battery and its plates moved so the distance between them is tripled.a. what is

For a normal distribution with a zero mean and standard : for a normal distribution with a zero mean and standard deviation of one use 10 random variables samples to compute the

How much petroleum coke must be added per 100 lb of basic : a particular manufacturer of charcoal briquettes is contracted to create a product that contains no more than 0.1 mass

Hooper printing inc has bonds outstanding with 10 years : hooper printing inc. has bonds outstanding with 10 years left to maturity. the bonds have an 7 annual coupon rate and

User Account

All Pages