Your medical research team is investigating the standard deviation of the cost of a​ 30-day supply of a certain heart medication. A pharmaceutical company thinks that the standard deviation of the cost is less than $17. You want to support this claim. How would you write the null and alternative​ hypotheses? H0​: ▼   sigma not equals 17σ≠17 sigma equals 17σ=17 sigma less than or equals 17σ≤17 sigma less than 17σ<17 sigma greater than or equals 17σ≥17 sigma greater than 17σ>17 Ha​: ▼   sigma less than or equals 17σ≤17 sigma not equals 17σ≠17 sigma greater than or equals 17σ≥17 sigma greater than 17σ>17 sigma equals 17σ=17 sigma less than 17

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