a tunnel is in the shape of a parabola. the maximum height is 30 feet and it is 18 feet wide at the base. what is the vertical c
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Answer:
The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance
Null hypothesis is accepted
Alternative hypothesis is rejected
A researcher wants to study the average miles run per day for marathon runners is 25
Step-by-step explanation:
<u><em>Step(i):</em></u>-
Given sample size 'n' = 36
Given mean of the sample x⁻ = 22.8 miles
Given mean of the Population 'μ' = 25
Given standard deviation of the Population 'σ' = 10
<u><em>Null hypothesis:-H₀: μ = 25</em></u>
<u><em>Alternative Hypothesis:H₁:μ ≠ 25</em></u>
Level of significance = 3 % or 97%
The critical value Z₀.₉₇ = 1.881
<u>Step(ii):</u>-
Test statistic
Z = -1.325
|Z| = |-1.325| = 1.325
The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance
Null hypothesis is accepted
Alternative hypothesis is rejected
<u>conclusion:-</u>
A researcher wants to study the average miles run per day for marathon runners is 25