25 questions

ovterq23
timer Asked: Apr 23rd, 2018

Question Description

For the following conjecture, determine what would the null and alternative hypotheses be.

Conjecture: The average age of community college students is 24.6 years.

a) LaTeX: \:\:\mu=24.6μ=24.6

b) LaTeX: \:\:\mu\ne24.6μ24.6

c) LaTeX: \:\:\mu data-verified=24.6">μ>24.6

d) LaTeX: \:\:\mu\ge24.6μ24.6

e) LaTeX: \:\:\mu<24.6μ<24.6

f) LaTeX: \:\:\mu\le24.6μ24.6

The null hypothesis is

The alternative hypothesis is

Flag this QuestionQuestion 21 pts

For the following conjecture, determine what would the null and alternative hypotheses be.

Conjecture: The majority of college students have credit cards.

a) LaTeX: \:\:p=0.5p=0.5

b) LaTeX: \:\:p\ne0.5p0.5

c) LaTeX: \:\:p data-verified=0.5">p>0.5

d) LaTeX: \:\:p\ge0.5p0.5

e) LaTeX: \:\:p<0.5p<0.5

f) LaTeX: \:\:p\le0.5p0.5

The null hypothesis is

The alternative hypothesis is

Flag this QuestionQuestion 31 pts

For the following conjecture, determine what would the null and alternative hypotheses be.

Conjecture: The average pulse of male marathon runners is less than 70 beats per minute.

a) LaTeX: \:\:\mu=70μ=70

b) LaTeX: \:\:\mu\ne70μ70

c) LaTeX: \:\:\mu data-verified=70">μ>70

d) LaTeX: \:\:\mu\ge70μ70

e) LaTeX: \:\:\mu<70μ<70

f) LaTeX: \:\:\mu\le70μ70

The null hypothesis is

The alternative hypothesis is

Flag this QuestionQuestion 41 pts

For the following conjecture, determine what would the null and alternative hypotheses be.

Conjecture: The proportion of homes with extinguishers is 0.80.

a) LaTeX: \:\:p=0.80p=0.80

b) LaTeX: \:\:p\ne0.80p0.80

c) LaTeX: \:\:p data-verified=0.80">p>0.80

d) LaTeX: \:\:p\ge0.80p0.80

e) LaTeX: \:\:p<0.80p<0.80

f) LaTeX: \:\:p\le0.80p0.80

The null hypothesis is

The alternative hypothesis is

Flag this QuestionQuestion 51 pts

Find the critical value(s), assuming that the normal distribution applies.

Two-tailed test, alpha = 0.01

a) LaTeX: z=\pm2.57z=±2.57

b) LaTeX: z=+2.57z=+2.57

c) LaTeX: z=-2.57z=2.57

d) LaTeX: z=\pm2.05z=±2.05

e) LaTeX: z=+2.05z=+2.05

f) LaTeX: z=-2.57z=2.57

The critical value(s) is

Flag this QuestionQuestion 61 pts

Find the critical value, assuming that the normal distribution applies.

Right-tailed test, alpha = 0.02

a) LaTeX: z=\pm2.57z=±2.57

b) LaTeX: z=+2.57z=+2.57

c) LaTeX: z=-2.57z=2.57

d) LaTeX: z=\pm2.05z=±2.05

e) LaTeX: z=+2.05z=+2.05

f) LaTeX: z=-2.57z=2.57

The critical value(s) is

Flag this QuestionQuestion 71 pts

Find the critical value, assuming that the normal distribution applies.

Alpha = 0.005 LaTeX: H_1\:\:\:p<0.78H1p<0.78

a) LaTeX: z=\pm2.57z=±2.57

b) LaTeX: z=+2.57z=+2.57

c) LaTeX: z=-2.57z=2.57

d) LaTeX: z=\pm2.05z=±2.05

e) LaTeX: z=+2.05z=+2.05

f) LaTeX: z=-2.57z=2.57

The critical value(s) is

Flag this QuestionQuestion 81 pts

The critical region is defined by the critical values \pm1.75±1.75. The value of the statistic is 1.8. Would you reject or fail to reject the hypothesis?

Flag this QuestionQuestion 91 pts

The critical region is defined by the critical value -2.33. The test statistic value is -1.7. Would you reject or fail to reject the hypothesis?

Flag this QuestionQuestion 101 pts

If

LaTeX: H_0\:\:\:p=0.2H0p=0.2, LaTeX: H_1\:\:\:p\ne0.2H1p0.2

then the test we use for hypothesis testing is

Flag this QuestionQuestion 111 pts

If

LaTeX: H_0\:\:\:p=0.2H0p=0.2, LaTeX: H_1\:\:\:p data-verified=0.2">H1p>0.2

then the test we use for hypothesis testing is

Flag this QuestionQuestion 121 pts

Use the given information to find the p-value: the test statistic is a left-tailed test and z=-1.25 (normal distribution).

Round your answer to nearest thousandths.

Flag this QuestionQuestion 131 pts

Use the given information to find the p-value: the test statistic is a two-tailed test and z=-2.75 (normal distribution).

Round your answer to nearest thousandths.

Flag this QuestionQuestion 141 pts

Use the given information to find the p-value: the test statistic is z=2.30 (normal distribution) and

LaTeX: H_1\:\:\:p data-verified=0.7">H1p>0.7

Round your answer to nearest thousandths.

Flag this QuestionQuestion 151 pts

If p-value is 0.001 and LaTeX: \alpha=0.01α=0.01 would you [decision]

Flag this QuestionQuestion 161 pts

If p-value is 0.07 and LaTeX: \alpha=0.01α=0.01 would you [decision]

Flag this QuestionQuestion 171 pts

The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:

LaTeX: H_0\:\:\mu=40000\:\:\:H_1\:\:\mu data-verified=40000">H0μ=40000H1μ>40000

Suppose that the true mean is $40000 and the dean rejects the null hypothesis. Is this

a) correct decision

b) Type I error

c) Type II error

Flag this QuestionQuestion 181 pts

The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:

LaTeX: H_0\:\:\mu=40000\:\:\:H_1\:\:\mu data-verified=40000">H0μ=40000H1μ>40000

Suppose that the true mean is $50000 and the dean rejects the null hypothesis. Is this

a) correct decision

b) Type I error

c) Type II error

Flag this QuestionQuestion 191 pts

The dean of CCP wants to determine whether the mean starting salary of graduates of the is greater than $40000. She will perform the test with the following hypotheses:

LaTeX: H_0\:\:\mu=40000\:\:\:H_1\:\:\mu data-verified=40000">H0μ=40000H1μ>40000

Suppose that the true mean is $50000 and the dean does not reject the null hypothesis. Is this

a) correct decision

b) Type I error

c) Type II error

Flag this QuestionQuestion 201 pts

A test of hypotheses LaTeX: H_0\:\:\mu=15\:H0μ=15 versus LaTeX: H_1\:\:\:\mu\ne15H1μ15 was performed. The p-value was 0.027. Fill in the blank: If LaTeX: \mu=15μ=15, then the probability of observing a test statistic as extreme as or more extreme than actually observed is

Flag this QuestionQuestion 211 pts

A hypothesis test result in a p-value of 0.007. Which is the best conclusion?

Flag this QuestionQuestion 221 pts

We never conclude that null hypothesis is true.

Flag this QuestionQuestion 231 pts

When we reject a null hypothesis, we are certain that the alternative hypothesis is true.

Flag this QuestionQuestion 241 pts

If a null hypothesis is rejected with a significance level of 0.05, it is also rejected with a significance level of 0.01?

Flag this QuestionQuestion 251 pts

If a null hypothesis is rejected with a significance level of 0.01, it is also rejected with a significance level of 0.05?

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