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WorksheetsQUIZ: Intro & Hypothesis Z-Test
Total questions: 10
Worksheet time: 12mins
Which of the following shows a left-tailed test?
H1: x̄ < 15
H0: x̄ < 15
H1: x̄ > 15
H0: x̄ > 15
The weight of the average 6th grade boy is 89 lbs. The principal of the school feeds them steak for first semester to see if their weight changes. What are the null and alternate hypotheses?
H0: μ = 89
H1: μ = 89
H0: μ = 89
H1: μ > 89
H0: μ = 89
H1: μ < 89
H0: μ = 89
H1: μ ≠ 89
Find the critical value(s) for a two-tailed test with α = 0.05
z = -1.64
z = 1.64
z = ±0.06
z = ±1.96
In a recent survey, the average amount of money
students have in their pockets is $5.40 with a standard
deviation of $1.20. A teacher feels that the average
amount is actually higher. She surveys 80 randomly
selected students and finds the average amount is
$5.50. What are the null and alternate hypotheses?
H0: x̄ = $5.40
H1: x̄ ≠ $5.40
H0: x̄ = $5.40
H1: x̄ > $5.40
H0: x̄ = $5.40
H1: x̄ < $5.40
H0: x̄ > $5.40
H1: x̄ = $5.40
In a recent survey, the average amount of money
students have in their pockets is $5.40 with a standard
deviation of $1.20. A teacher feels that the average
amount is actually higher. She surveys 80 randomly
selected students and finds the average amount is
$5.50. Which test should be used?
z-test
t-test
z-test for proportion
χ2-test
In a recent survey, the average amount of money
students have in their pockets is $5.40 with a standard
deviation of $1.20. A teacher feels that the average
amount is actually higher. She surveys 80 randomly
selected students and finds the average amount is
$5.50. At α = 0.05, what is the p-value for this test?
p = 0.456
p = 0.772
p = 0.228
p = 0.229
In a recent survey, the average amount of money
students have in their pockets is $5.40 with a standard
deviation of $1.20. A teacher feels that the average
amount is actually higher. She surveys 80 randomly
selected students and finds the average amount is
$5.50. At α = 0.05, do we accept or reject the null hypothesis?
Accept H0
Reject H0
In a recent survey, the average amount of money
students have in their pockets is $5.40 with a standard
deviation of $1.20. A teacher feels that the average
amount is actually higher. She surveys 80 randomly
selected students and finds the average amount is
$5.50. At α = 0.05, test the teacher’s claim that the
average amount of money is actually higher than $5.40.
There is enough evidence to reject the claim
There is not enough evidence to reject the claim
There is enough evidence to support the claim that the average amount of money is higher
There is not enough evidence to support the claim that the average amount of money is higher
The average cost of a speeding ticket is $155. The population standard deviation is $10.78. A random sample of 35 speeding ticket court cases showed that the mean cost was $152.59. At the 0.05 significance level, is that less than $155?
Yes, there is a significant difference
Yes, there is not a significant difference
No, there is a significant difference
No, there is not a significant difference
