multiples choice

1.If the average derived from a specific sample is $43,000 then x= 43,000 is the ..............of the population means

a)Deviation

b)Estimate

c)Point

d)Static point

2.In a sample of 500 students, 80 prefer online resources versus printed materials. The standard error for the sample proportion is

a)0.002

b)0.018

c)0.014

d)0.040

3.A range valued use to estimate a population parameter of interest is called

a)Estimate error

b)Confidence interval

c)Standard error

d)Probability of success

4.In a sample of 25, the mean is x= 86.92 with a standard deviation of s =9.87. Assuming the results follow a normal distribution, construct the 90% confidence interval for population mean. The t table = 1.711

a)90% confidential interval is 86.92 + 3.86

b)90% confidential interval is 90.30

c)90% confidential interval is between 83.54 and 90.30

d)90% confidential interval is 86.82 +1.711

5.If the confidence coefficient is 0.85, what is the implied probability of error a?

a)0.15

b)0.85

c)1

d)0.05

6.In a sample of 50 iPhones, 13 had over 100 apps downloaded. Construct a 99% confidence interval for the population proportion of all iPhones that obtain over 100 apps. Assume Z0. 005 = 2 .576

a)0.13+0.16

b)0.13 + 0.09

c)0.26 + 0.15

d)0.26 + 0.16

7.According to the United States census Bureau, the average single-family home constructed in 2016 was 2,438 square feet. Carmen wondered if families in her area still want a smaller home in comparison to the average. She randomly selected 45 people and ask what the idea square footage of a home is for them. from the responses she calculates the sample mean equals 1,550 square feet with sample standard deviation of 54 square feet. Calculate the value of statistic.

a)-1.32

b)2.31

c)-2.45

d)1.32

8.What does a =0.01 reflect?

a)There is 1% change of rejecting a true null hypothesis

b)There is 1% change of accepting a true null hypothesis

c)Without an identified m there is no significant meaning

d)The 1% is the highest significant level

9.In 2019 Quinnipiac university poll of registered voters, 52% oppose making all US public collages free. The Glangariff group in Mexican collected data from 600 voters, where 342 support a taxpayer -funded free collage program. Calculate the value of test statistic

a)2.09

b)2.45

c)12.02

d)2.04

10.A p value of 0.07698 was reported for a study with a 10% significance level. Should the null hypothesis be accepted or rejected?

a)Accept the null hypothesis because the p value = 0.07698 is part of a = 0.10

b)Accept the null hypothesis because the p value = 0.07698 is less than a = 0.10

c)Rejected the null hypothesis because the p value = 0.07698 is less than a = 0.10

d)Not enough information to determine